Image Convert Ninja

Welcome to the Image Convert Ninja documentation!

Here you will find all the information you need to know about using this tool.

Image Viewer

Image Viewer lets you see the images you upload right on the page. You don’t need any extra software or plug-ins. The tool uses the power of your device’s GPU (using WebGL), so it is as good as, or even better than, some desktop image viewers.

You can use Image Convert Ninja because of Image Viewer alone, without using the format conversion features at all. You can also use it on mobile devices like smartphones and tablets, which usually don’t have good image viewer software. They usually only have a standard photo gallery app. For instance, Image Convert Ninja's Image Viewer can handle TIFF, HDR or EXR formats, which most mobile photo viewers don’t support.

Controls Lock

When you open your first image, and it is loaded in the Image Viewer, you can start working with it.

By default, the Image Viewer controls are locked. This is on purpose to make sure that the zoom and pan features in the Image Viewer don’t accidentally mess with the page scrolling.

For example, if the Image Viewer controls are unlocked, when you move the mouse over the Image Viewer and then try to scroll the page using the wheel, you’ll zoom in and out of the image in the Image Viewer instead of scrolling the page. Likewise, on a mobile device, when you swipe with your finger over the Image Viewer with the controls unlocked, you’ll move the image instead of scrolling. This can be confusing at first, that’s why the controls are locked by default.

If you want to unlock the Image Viewer controls, use the padlock icon in the bottom-left corner of the Image Viewer.

Panning

To pan or move the image in any direction inside the Image Viewer, you can click or tap on the image and drag it to where you want. You can use the left mouse button or your finger if you are on a mobile device.

Zooming

To zoom in or out, you can scroll the mouse wheel or use pinch gestures on the image. You can do this on any part of the Image Viewer.

Reset View

Double-click or double-tap anywhere in the Image Viewer to fit an image into the current frame of the Image Viewer viewport.

Full Page Mode

Browser's classic full-screen mode takes over the entire display, which can be intrusive and inconvenient, especially on mobile browsers. For instance, on mobile devices, like iPad, a swipe-down gesture instantly exits full-screen mode, making image navigation challenging. To avoid the classic full-screen issues like this, Image Convert Ninja uses Full Page Mode instead. Unlike full-screen, Full Page Mode doesn’t cover the entire screen but adjusts page layout to fill the available page space, keeping browser controls accessible. This way, it avoids triggering the browser’s full-screen mode, simply rearranging the page layout to maximize space for the Image Viewer and image conversion controls.

To enter Full Page Mode, click the square icon in the top-left corner of the Image Viewer. This action will expand the entire Image Convert Ninja app to occupy all available space within your browser viewport.

To exit this mode, simply click the same button again or use the Escape key on your keyboard.

In Full Page Mode, the conversion controls will be displayed in a floating panel on the right side, overlaying the Image Viewer and providing easy access without taking up extra space.

Please note that Full Page Mode is not available on small screen devices, such as smartphones in portrait mode, since the Image Viewer already utilizes the full width of the screen.

Another thing to note is that when you enter Full Page Mode, you'll likely want to zoom and pan the image in the Image Viewer. Therefore, entering Full Page Mode will automatically unlock the Image Viewer controls if they are locked, ensuring you can immediately interact with the image without additional steps.

If the browser height is too small, there is a chance that the image conversion control panels at the right side will overflow the view. In this case, make sure your browser height is tall enough, or consider this as an indicator that Full Page Mode may not be suitable for your current browser window size.

Live Preview

When you upload an image, the Image Viewer displays the original image for a moment. Meanwhile, the image conversion starts in the background. When the conversion is complete, the converted image replaces the original in the viewer, so you can see the result immediately. Each time you change the conversion parameters, the process restarts in the background and the new image appears as soon as the conversion is complete. This means you can see the conversion results in near real-time (depending on the image settings and your device's performance), hence the name "Live Preview".

This is a unique feature that you probably won't find in any other image conversion software.

The live preview feature in Image Convert Ninja enables you to effortlessly find the optimal balance between image quality and file size. This feature eliminates the need for guesswork and repeated saving and checking of images.

With Live Preview, you can experiment with different settings and instantly see the results, allowing you to achieve the perfect quality-size balance for your needs.

Instant Results

When you load an image, Image Convert Ninja immediately converts it based on your current settings, displaying the result live in the Image Viewer. This allows you to tweak settings and see the outcome almost instantly, depending on the image size and your device's performance.

To preview provided image "as is" without conversion impact and retain transparency, choose the lossless PNG format.

Size Prediction

As you adjust the image settings, Image Convert Ninja predicts the final file size, providing crucial information on how much space your saved image will occupy. This size indicator is conveniently located right at the yellow Save Image Button.

Input

To begin, you'll need to open an image.

When you add your first image, Ninja's Image Viewer will display it almost instantly or after a brief loading period, depending on the image's format, size, and your device's performance. You might see a spinning icon while it loads. Once loaded, you can start using the tool.

Basic information about the opened image will be displayed at the top of the Input pane.

Example: Input: car.png | 1.2 MB | 1 920 x 1 080px

In this example, "car.png" is the name of the uploaded image, "1.2 MB" is its original file size before conversion, and "1 920 x 1 080 px" represents the original image resolution.

Using Input panel you can load images into Image Convert Ninja in several ways, as described below.

By Open / Change Image Button

The most straightforward method is to click the big blue OPEN IMAGE button. On desktop, it's located at the top right. On narrower screens, such as mobile phones, it is located directly below the Image Viewer - a large rectangular area with a cool blue Ninja logo.

Click this button, and it will open a standard file dialog box for your browser and OS where you can locate your image file.

Once the image is loaded, you will see it in the Image Viewer viewport instead of the Image Convert Ninja logo. The text on this button will change from OPEN IMAGE to CHANGE IMAGE to indicate that you can add another image. You can change the current image with another one as many times as you want. No need to reload the page.

By Clipboard

You can transfer an image to the Image Viewer using the clipboard.

First, copy the image to the clipboard from a screenshot app, editor, browser, or other sources. Use corresponding app context menu or hotkeys Ctrl + C / ⌘ + C.

Once the image data is in the clipboard, return to Image Convert Ninja and paste it using:

• Hotkeys: Ctrl + V on Windows or ⌘ + V on Mac.
• Paste button: Click the blue PASTE button with clipboard icon.

With the Paste from Clipboard option, Image Convert Ninja provides the easiest way to save images from the clipboard. For example, when using some screenshot tools, especially those built into operating systems, you can copy the screen image to the clipboard, but saving it to the right folder on your computer and in the right format can be a real pain. With Image Ninja, this process becomes as simple as possible. Copy from anywhere, paste it here and you're done!

By Link

To use an image from the web with Image Convert Ninja, you can provide a direct link to the image.

1. In the dropdown menu next to the Clipboard button, select the second option: Enter Image URL. The button on the left will change to a By Link button.

2. Click the By Link button to open a dialog box where you can paste or type the image URL. This feature is particularly handy for mobile devices.

Additionally, you can paste or drop links in the same way you would with files.

By Base64 Text

If you have an image encoded in Base64 format as plain text, you can paste it directly using the paste hotkey or the By Base64 Text button.

1. In the dropdown menu next to the Clipboard button, select the third option: Enter Base64 Image. The button on the left will change to By Base64 Text.

2. Click the By Base64 Text button to open a dialog box where you can paste the Base64 image code as plain text. The Image Convert Ninja will automatically convert base64 text to an image for further use.

By Drag and Drop

Another approach is to use drag and drop. You can grab an image and drop it directly onto the Image Viewer viewport.

If you are on a mobile device, this option isn't available for most devices, simply because most mobile operating systems only allow one app to be displayed at a time, preventing you from dragging something from one app window and dropping it into another app window.

Input Formats

Image Convert Ninja supports all major web formats as well as additional formats that are typically considered desktop-only.

Web formats

These are formats used on web pages as online images. They include JPEG, WebP, AVIF, PNG, APNG, GIF, SVG, BMP, and ICO.

Some of these formats, such as PNG, GIF, WebP, AVIF, and SVG, may contain an alpha channel. The checkerboard backdrop will be visible in the Image Viewer viewport through the parts of the image affected by the alpha.

The APNG and GIF formats can contain animation. However, Image Convert Ninja will only show the first frame and ignore the rest.

Desktop Formats

These types of files are often found exclusively in desktop software, but the online Image Convert Ninja tool can open HEIC, HEIF, 8-bit TIFF, 32-bit HDR, and 32-bit EXR files right in your browser.

Maximum Input Resolution

Browsers themselves limit the maximum input image size that can be loaded into memory.

For desktop browsers based on Chromium, this limit is about 32K pixels. For Firefox and mobile browsers, this limit is lower and depends on the browser.

This means that if you upload an image that exceeds this limit, the browser will refuse to use it at all.

Additionally, Image Convert Ninja uses WebGL and treats images as textures, so the maximum resolution it can process is additionally limited by the browser's Maximum Texture Size property.

For desktop browsers based on Chromium, it is about 16K pixels (16384px on the larger side). In Firefox, this limit is 8K pixels (8192px on the larger side). For mobile devices, texture size limit can be even lower.

This means that even if you upload, say, a 30K image, the browser may reduce the input resolution to 16K, 8K, or less.

Tuning

The Tuning panel offers detailed image customization options. It contains several collapsed panes, with the Quality panel expanded by default. Clicking on any collapsed panel will expand it while collapsing all other panels.

Flip & Rotate

The Flip & Rotate pane lets you mirror or rotate your image.

Flip

• Click the L/R button for a horizontal flip (swap left and right image sides).
• Click the T/B button for a vertical flip (swap top and bottom image sides).

Click the button again to undo the flip.

Rotate

• Click the -90° button to rotate counter-clockwise by 90 degrees.
• Click the 90° button to rotate clockwise by 90 degrees.

Click the button again to undo the rotation.

Crop

The Crop pane in Image Convert Ninja provides access to the image Cropper - dedicated editor designed for precise image cropping. Together with the ability to open virtually any image format, this tool provides unparalleled flexibility and performance for online image cropping.

To begin cropping:

1. Click the Specify Crop Area button to open the Cropper dialog.
2. In the Cropper, a blue selection box overlay will appear on your image. Drag and resize this box to define your desired crop area.
3. Click the Apply Crop Area button to apply the selected crop.

Image Convert Ninja will instantly update the Image Viewer with a Live Preview of the cropped image and display the updated file size in the Output panel.

The Specify Crop Area button will change to Edit Crop Area, indicating that the Cropper retains your crop data. Click this button again to edit the previously applied crop area[2].

To revert the image to its original size, click the reset button featuring the icon.

Crop Area Limit

• None: The crop area can move freely beyond the image boundaries.
• Image: The crop area is confined within the original image boundaries and cannot extend beyond its edges.

Overview

The Crop Area Limit feature is designed to enhance your cropping experience by ensuring that the crop area does not extend beyond the image, thus preventing any blank spaces in the final cropped result. By default, the crop area is restricted within the Image boundaries, offering a straightforward approach to cropping.

In Image limit mode, you don’t need to worry about precision since the crop area remains confined within the image, making it easier to achieve your desired composition.

If you prefer more flexibility, you can select the None option, which allows the crop area to extend beyond the image edges. However, with this option, it's important to be cautious, as moving the crop area outside the image boundaries can lead to unintended results.

Cropper Dialog Controls

• Use Pan mode to move the image outside the crop box while the crop box remains in place.

• Use Draw mode to draw a new crop area by dragging outside the crop box.

• Use the Aspect input to set a fixed aspect ratio for the crop box. By default, crop box aspect is Flexible, so you free to draw freeform crop boxes.

• Use the Rotation input to adjust the image rotation angle with 1° precision.

Once you've made your adjustments, click the Apply Crop Area button to apply the selected crop to your image. You can also apply the crop area by double-clicking on the crop box.

Resolution

The Resolution pane allows you to adjust the size of the converted image. Enter the desired width or height in pixels, then click Apply or press Enter.

Image Convert Ninja immediately displays a Live Preview of the resized image in the Image Viewer and updates the file size in the Output panel.

You can modify the resolution multiple times. To revert to the last applied change, click Reset Last. To restore the original image size, click Reset Init, then apply the changes by clicking Apply.

Aspect Lock

By default, the tool maintains the image’s original aspect ratio. Changing one dimension automatically adjusts the other.

To modify dimensions independently, click the Aspect Lock button between the Width and Height fields. Be aware that unlocking the aspect ratio can distort the image if the new proportions differ significantly from the original.

Filter

Image filtering is the process of intelligently calculating new pixel values based on surrounding pixels. When resizing an image, particularly during downsizing, simple pixel reduction can lead to aliasing, jagged edges, and loss of detail. Filtering algorithms mitigate these issues by smoothing transitions between pixels and preserving image details.

While filtering enhances image quality, it may slightly increase processing time.

Image Convert Ninja offers three filtering options to accommodate various needs:

None

• No filtering applied
• Fastest processing time
• Downsizing may result in pixelation and aliasing
• Default option, suitable for most situations when images are not resized

Soft

• Blends adjacent pixels for a softer appearance
• Produces blurrier, less defined image details
• Ideal for portraits and nature photographs
• Consider when downsizing images

Crisp

• Combines smoothing with edge enhancement
• Produces sharper, more defined image details
• Best for images with text, logos, or distinct edges
• Consider when downsizing images

You can control the strength of the filtering effect using the Filter Intensity slider, which has three levels: 1, 2, and 3. The default value is 1, with higher values resulting in stronger filtering effects.

Filtering occurs at the pixel level, meaning that for lower-resolution images, the effect will be more pronounced. In contrast, for higher-resolution images, the effect may be less noticeable.

The Crisp filter set to a value of 2 produce most appealing results in most cases.

Quality (Compression)

The Quality pane allows you to choose how much you want to reduce the size of the image file by reducing its quality. Using the slider or the input field, you can set the compression level from 0% to 100%. The lower the compression level, the smaller the file size, but the worse the quality. The higher the level, the larger the file size, but the better the quality.

The Quality panel is only active when you've chosen a compressible format to save your image, such as JPEG, WebP or AVIF. These formats use an image data compression technique, which means they discard some details of the image to reduce its size. All other output formats are lossless formats, which means they preserve all the details of the image, but at the expense of its size. That's why the Compression / Quality panel is grayed out when you choose lossless output formats.

The Image Convert Ninja is a wonderful image compressor and image size reducer, combined with the Live Preview feature, it allows you to find the perfect balance between image quality and file size.

Output

The Output panel is where you can select conversion format and choose where to save converted image to your device on to copy it ti clipboard. This panel also provides helpful information about the converted image.

Example: Output: car_(r1920x1080_q80).avif | 187.5 KB | in 15.37s

In this example:

• car_(r1920x1080_q80).avif: The new name of the converted image.
• 187.5 KB: The size of the converted image.
• 15.37s: The total time taken to perform the conversion.

Format Selector

This is a drop-down list with available formats for saving the image. Here you can choose between compressible and lossless formats. The default format is JPEG. If you select one of the compressible formats, the Compression / Quality panel will become active, where you can also choose the desired compression level.

Copy to Clipboard

This feature allows you to copy the converted image to your clipboard with a single click, making it easier to transfer images between applications without needing to save and manually upload them. Simply copy the image to your clipboard and then paste it into another website, messenger (like WhatsApp or Telegram), or any other app that accepts images.

This functionality is perfect for quick sharing and efficient multitasking, enhancing productivity by simplifying the process of using and distributing images.

Copy to Clipboard: Copy Image

By default, the Copy Image option is selected.

The Copy Image button will copy the converted image data to your clipboard as an image, allowing you to share this image with other apps that support pasting images from the clipboard.

Copy to Clipboard: Copy Base64

When Copy Base64 is selected, the button copies the image as a Base64-encoded URL to the clipboard. You can use this feature to insert an image into HTML or CSS code [background: url(Base64 image string goes here...)], or to share it online without saving it as a file. This button is only active when you've selected JPEG, WebP, or PNG as the output format.

Save (Download) Image Button

Click the Save Image Button to download it directly to your device. Thanks to the Live Preview magic, your image is already pre-converted, so saving happens in a flash!

While Saving

The button will change to "Converting..." with a loading indicator. Once ready, a standard file save dialog will appear, allowing you to choose a destination on your device.

Preserving Transparency

Transparency (alpha channel) in uploaded images will be maintained in the Image Viewer and during saving. To retain transparency, during saving, choose a format that supports it (all formats except JPEG).

Saving a transparent image as a JPEG will convert transparent pixels to white, resulting in a white background.

File Naming

From Clipboard

Images taken from the clipboard do not have an initial name, so they will be given a unique name using current date and time.

Example: Passing an image from clipboard and saving it as JPEG on May 24, 2024, at 5:03:52 PM, will produce filename as: "Clipboard Image May 24, 2024 at 17-03-52.jpg".

From File or URL

Images converted from a file or URL do have an initial name. Therefore, the saved file will inherit the name of your uploaded image, with only the extension changed.

Example: Uploading "car.png" and choosing WEBP format will save the file as "car.webp".

In case if you change the compression quality, resolution, or both, a corresponding suffix will be added to the filename.

Example: Uploading "car.png" with a resolution of 1920x1080px, choosing WEBP format with 80% quality, as well as downsizing it to 1000x563px will result in a filename: "car_(r1000x563_q80).webp".

If a flip or rotation is applied, a corresponding suffix will be added to the filename.

Example: If you flip the image horizontally and rotate it 90 degrees clockwise, the filename will be: "car_(fx_cv).webp".

Stripping Image Metadata

Image metadata - embedded information within an image, often includes details about the capturing device, its camera specifications, the operating system, editing software, and even the location where it was taken. While this information can be helpful in some cases, it can also pose privacy concerns. If you want to remove metadata from an image without altering its visual content, Image Convert Ninja is the perfect tool for the job.

Unlike other methods that depend on explicitly removing metadata, Image Convert Ninja achieves this by simply ignoring it entirely. The tool focuses exclusively on manipulating the pixel data of an image, without even reading the metadata from the source image you provide. Essentially, Image Convert Ninja neither accesses nor reinserts metadata during the image reading/saving process.

To remove metadata using Image Convert Ninja, simply upload the desired image, choose the preferred output format, and save it. The resulting image will retain its original visual characteristics while being devoid of embedded metadata.

Output Formats

You can save/convert images to the formats listed below.

Compressible

Lossless

PNG, GIF, BMP and ICO.

Maximum Output Resolution

By default, Image Convert Ninja is set up to limit the maximum output resolution to 16384px on the larger side. However, this limit is not enforced by the browser. Different browsers have their own internal limits, defined by combination of hardware, operating system, and the browser itself.

In short, the browser limits the total number of pixels (width*height) of the so-called "Drawing Buffer", used by Image Convert Ninja during the conversion process, which is regulated by the maximum memory allocated to the browser tab with the page. If combination of width & height exceeds this limit, browser will limit the output Drawing Buffer.

Example: On macOS (MacBook Air M1 16Gb), the maximum width for 16/9 aspect images is around:

• 7680 pixels for Chrome
• 8192 pixels for Firefox
• 16000 pixels for Safari

These values can vary depending on the specific device and system configuration.

Another important thing is that this limit is not exposed by any browser API. So Image Convert Ninja cannot know it in advance until the limit is exceeded.

Let's say you opened a 20K image. Image Convert Ninja will request the browser API to perform a conversion of the full 20K, but the browser will limit it to, let's say, 8K. The output image will be 8K.

Image Convert Ninja will then compare the actual (8K) size with the internal (16K) limit and set a new, actual limit for the current image. This will affect the maximum resolution you can set for this image in the resolution input fields in the Tuning panel > Resolution pane. You will also see a notification sign at the right side of the Resolution pane title with the actual limit specified.

General

Performance

Image Convert Ninja is a powerful web-based program that works with images by using the power of your device. It makes use of both the CPU and the GPU. This implies that the speed of uploading, processing, and saving images is directly determined by the speed of your device and the size of the images you use.

If you are opening a very large image of several hundred megabytes, Image Convert Ninja will handle it, but it will take some time.

If you are dealing with a very large image, the processing may take several seconds, which exceeds the process execution time limit of your browser. In response to this, your browser may think that Image Convert Ninja is "frozen" and not working properly. Then it will show you a prompt that says "Page not responding" and ask you to "Wait" or "Exit" the page. In this case, you don't need to do anything, just wait for the image to load. The browser will close this window by itself.

Security

Image Convert Ninja is technically a client-side only program that runs exclusively in your browser. It does not use a server to process images, but instead uses the power of your device. Since all image processing takes place locally in your browser, Image Convert Ninja is completely private and secure. It doesn't even require an internet connection, except for the one-time download of this page. No one but you know what images you are viewing or converting here.

About

Why Ninja?

The Image Convert Ninja logo features a cartoon ninja breaking a board labeled "Image" into three pieces: .JPEG, .WebP, and .PNG. This symbolizes the tool's ability to take one image and convert it to different formats.

The ninja represents speed and accuracy, highlighting Image Convert Ninja as a fast and efficient way to view and convert images online. It also symbolizes stealth and secrecy, ensuring that your images are safe and private. Moreover, the ninja's mastery of many skills represents the tool's versatility, from adjusting brightness and compression levels to copying images as base64 code and displaying them in high resolution.

Finally, the ninja character adds a fun and friendly element. Image Convert Ninja is designed to be easy and enjoyable to use, with a simple and intuitive interface that requires no learning curve for non-professional users. Just open it, and you will immediately understand how to use it, even if it is your first time.

To sum it up, Image Convert Ninja is a fast, easy, secure, and fun way to view and convert images online.

History

In 2022, Image Convert Ninja was launched as a 32-bit online image viewer. The goal was to provide a cross-platform service for opening HDR or EXR files on Windows, Linux, macOS, iOS, or Android devices, bringing the desktop app experience to the web and mobile devices.

It soon became clear that this tool could do much more. It was expanded to view all common 8-bit image formats, and later it was “upgraded” to be used not only for viewing but also for converting images. Thus, what was originally an online HDR file viewer has evolved into a comprehensive online image converter and viewer, offering users a number of features and benefits that no one else provides for free.

Image Convert Ninja aims to fill a gap in free online image processing services by providing functionality that is both extensive and accessible to non-professional users. Unlike other services that are either too limited or too complicated, Image Convert Ninja offers a balanced solution.

Feedback

Feel free to reach out with any questions, feedback, or suggestions. Your input is invaluable in helping improve Image Convert Ninja.

Thank you for using Image Convert Ninja. Enjoy fast, secure, and high-quality online image conversion and viewing!

Updates

v7.9.0 (Oct 9, 2024 Update): Enhanced Full Screen Mode

Full Page Mode: The traditional full-screen mode has been replaced with an improved Full Page Mode. Rather than taking over the entire screen, the app now rearrange page layout to full entire page space. This enhancement is especially mobile-friendly, as mobile browsers don’t fully support true full-screen mode. It's particularly beneficial for using Image Convert Ninja on tablets.

This new approach also enhances functionality by displaying all image controls as the right side floating panel. This allows you to not only view but also interact with and edit images directly while in Full Page Mode, offering a more immersive user experience.

v7.8.0 (Oct 6, 2024 Update): Filtering Intensity Control

• Filter Intensity: The Filter pane now includes a Filter Intensity slider, giving you more control over the strength of interpolation filters. You can choose between intensity levels 1, 2, and 3 to fine-tune the sharpness or smoothness of your images.

  • Crisp filter: Adjust intensity to sharpen images and enhance edges.
  • Soft filter: Adjust intensity to blur images for a softer, more subtle effect.

In addition to enhanced resizing, you can now also use filtering for sharpening or blurring images without changing their resolution, providing greater flexibility in image adjustments.

v7.7.0 (Oct 4, 2024 Update): Enhanced Interpolation Filtering

• Filter: The new Filter pane now provides Crisp and Soft interpolation filtering options to achieve better image quality when downsizing images.

v7.6.0 (Oct 2, 2024 Update): Crop Area Limit

• Enhanced Cropping: The Cropper enhanced with crop area limit, that ensures that the crop area is not goes outside image boundaries, and cropping result will not have blank areas. This alow you be more productive, when cropping, not waisting time to targeting on image borders.

v7.5.1 (Sep 24, 2024 Update): Enhanced Smooth Interpolation for Image Resizing

• Smoother Resizing: Advanced smooth interpolation feature for image resizer. This enhancement significantly reduces noticeable pixelation in resized images, ensuring a more visually appealing result.

v7.4.0 (Aug 20, 2024 Update): Enhanced Image Creation and Base64 Support

• New Base64 Text to Image Conversion: The Input panel now includes a By Base64 Text feature, allowing you to easily create an image from a Base64 string. Simply enter a Base64 image code into the text field, and Image Convert Ninja will instantly generate an image from it.

• Improved Base64 Support: Enhanced Base64 handling capabilities, providing better detection and support for various Base64 image formats.

• Enhanced Image Type Detection: The application now offers improved image type detection when dropping or pasting files, URLs, or Base64 strings. This feature automatically recognizes the image format, streamlining the conversion process.

v7.3.0 (Aug 13, 2024 Update): Cropper's Image Rotation

• Rotation: The Cropper tool has been enhanced with a new Rotation feature, allowing you to precisely rotate an image by any angle in 1-degree increments.

v7.2.0 (Aug 12, 2024 Update): Crop Box Aspect Ratio

• Aspect Ratio Input: The Cropper tool enhanced with a new Aspect Ratio feature, allowing you to precisely control the proportions of your crop area.

v7.1.0 (Aug 10, 2024 Update): Draw and Pan Modes for more Precise Cropping

The Cropper has been enhanced with two new tools for more precise image cropping:

• Draw mode switch: Create custom crop areas by dragging a selection box over the desired image region.

• Pan mode switch: Easily adjust the position of an image under the crop area, allowing for pixel-perfect placement.

v7.0.0 (Aug 06, 2024 Update): Image Cropper

• Free Online Image Cropper: You can now crop images with precision using an intuitive editor. This important addition completes Image Convert Ninja's toolset covering all essential image conversion needs.

• HDR Exposure Removed: To simplify the user interface, the HDR Exposure adjustment pane has been hidden in the Tuning panel. HDR and EXR images will now open with their default exposure settings.

v6.1.0 (Jul 31, 2024 Update): Image Rotation

In this update, you can now rotate images in 90° increments clockwise and counter-clockwise in a single click.

v6.0.0 (Jul 30, 2024 Update): Image Flipper

In this update, the new Flip feature has been introduced, allowing you to easily flip images horizontally and vertically. The Flip pane includes buttons for flipping Left/Right and Top/Bottom, providing more control over image orientation.

v5.0.0 (Jul 27, 2024 Update): Image Resizing Feature & Collapsible Panes

• Image Resizing: You can now easily adjust the resolution of your images to your desired dimensions. This feature is perfect for optimizing image size and meeting the specific requirements for various platforms and services. With Image Convert Ninja's powerful resize feature, you can easily resize images while preserving the aspect ratio or change the aspect ratio completely. Now, Image Convert Ninja is also an image ratio converter.

• Collapsible Panes: Introducing collapsible panes in the Tuning panel. This UI enhancement allows you to save space by collapsing settings sections that are not in use, helping you to focus on the current feature without distractions.

v4.2.0 (Jun 26, 2024 Update): AVIF & WebP with Variable Compression

• AVIF variable compression level: AVIF is now a compressible format. Previously listed as lossless, you can now choose the compression level for AVIF format, making Image Convert Ninja a fully-featured online AVIF converter / compressor.

• WebP enhances for iOS and Safari: Adjustable compression levels for WebP output are now supported on iOS devices, including iPads and iPhones, as well as on MacOS Safari browser.

• User Interface Enhancements: The UI now displays more information about input and output images, including names and conversion time and resolution.

v4.1.0 (Jun 13, 2024 Update): Copy Image Button

• Copy Image to Clipboard: You can now directly copy the converted image to your clipboard with a single click.

• User Interface Enhancements: Key UI buttons have been rearranged, resized, and recolored for a better user experience.

v4.0.0 (Jun 06, 2024 Update): Live Preview Introduced

• Real-time Conversion Feedback: Now, you can see the conversion results directly in the Image Viewer as you adjust the settings, providing immediate visual feedback.

• Final Image Size Prediction: The Live Preview feature now includes an accurate prediction of the converted file size based on your selected settings. This ensures that your image meets the required size specifications before you save it.

• Instantaneous Saving: Image Convert Ninja now saves images instantly, thanks to background conversion processes that occur in real-time behind the scenes prior to saving.

• User Interface Enhancements: Minor UI changes have been made for a more intuitive and seamless user experience.

v3.5.0 (May 24, 2024 Update): Full Transparency Support

• Improved Transparency Handling: Image Convert Ninja now preserves transparency (alpha channel) when saving converted images in any supported formats except JPEG. Transparency is not supported when saving in JPEG format. Saving a transparent image as JPEG will result in a white background. So it's now a fully functional transparent image converter.

v3.4.0 (May 01, 2024 Update)

• HEIC and HEIF support is here! Convert your favorite iPhone photos and other HEIC/HEIF images to more widely compatible formats with Image Convert Ninja. Now you can use Image Convert Ninja as a universal online HEIC / HEIF converter. With Image Convert Ninja you can instantly convert heic to jpg, convert heic to png, and so on.

v3.3.0 (Apr 24, 2024 Update)

• Image form link support. Now you can easily use web images by simply providing a link. Just provide a link to the image and Image Convert Ninja will download and show it to you so you can convert and save it in any format. Use paste hotkeys, dragging and dropping, utilize the add image from Link button.

• The Paste image from clipboard button added.

v3.2.0 (Apr 15, 2024 Update)

• The Image Convert Ninja now supports inserting images from the clipboard by hotkeys, which allows you to quickly and easily transfer image data.

• The interface of Image Convert Ninja has been further refined for improved usability and aesthetics.

v3.1.0 (Sep 17, 2023 Update)

• The Image Viewer has been enhanced with a full-screen mode feature. Now you can switch it to full screen mode in one click.

• The whole Image Convert Ninja documentation has been rewritten from scratch to make it more concise, less verbose, and more user-friendly.

v3.0.0 (Sep 10, 2023 Update)

• The layout of the Image Ninja interface and all its individual elements have been totally redone.

• The Image Viewer is now on the left, while the control panels are on the right. Only on tiny screens does the Image Viewer take up the full browser window, and all the panels will relocate themselves beneath the Image Viewer automatically.

• On medium and large screens, Image Ninja automatically adapts its layout to the available screen space. This way, all Ninja's components are visible at once. This eliminates the need to scroll to get to any part of the interface, whether you want to open a new image or save a converted one.

v2.2.1 (Aug 31, 2023 Update)

• The Image Viewer shows the given image against a checkerboard background. If you provide an image with transparency capabilities, i.e. PNG, GIF, WEBP, AVIF or SVG, the checkerboard backdrop will also be visible through the areas of the image affected by the alpha channel.

• The ability to use the mouse wheel to change the Tone Mapping Exposure and Compression sliders has been removed. This will prevent you from accidentally altering the sliders positions when scrolling the page with the mouse wheel.

• Fixed a bug with the image exposure unexpectedly being reset while navigating the page.

v2.1.0 (Mar 17, 2023 Update)

• Image Viewer navigation controls like Zoom and Pan are now locked by default. This will improve the experience of using Image Viewer on mobile devices by allowing users to easily scroll the page by swiping up and down, including across Image Viewer, without interfering with controls.

• Image Viewer now has a button with a lock icon in the bottom-left corner. You may use it to lock and unlock Image Viewer controls.

v2.0.0 (Mar 11, 2023 Update)

• The tool has been renamed from "Online Image Converter HDR" to "Image Convert Ninja". Having said that, this program is clearly now more about converting images than viewing them. But, Ninja continues to view images.

• The Image Viewer itself has been significantly redesigned. Separate "Full Screen" and "Reset View" buttons have been removed. The full-screen mode capability has been eliminated entirely. Reset View, on the other hand, has developed into a double-click option. By double-clicking anywhere on the Image Viewer, you can now simply reset the view.