JXL to WebP Converter

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Convert your JXL (JPEG XL) images to the efficient WebP format, ideal for web optimization.

✓ Batch Conversion✓ Lossless & Lossy WebP✓ Transparency Control✓ Optional Resizing✓ Filename Customization✓ Client-Side Processing

Click to select JXL files or drag & drop

(Max 10MB per file. Client-side conversion may take time.)

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Why Convert JXL to WebP?

While JXL (JPEG XL) is a cutting-edge image format, WebP is currently more widely adopted across the web and offers excellent optimization benefits:

  • Broader Browser Support: WebP is supported by all major modern web browsers, making it a safer choice for ensuring images display correctly for all users.
  • Superior Compression: WebP generally provides much better compression than older formats like JPEG and PNG, leading to significantly smaller file sizes for web delivery.
  • Faster Websites: Smaller image files mean your web pages load faster, improving user experience, reducing bandwidth, and potentially boosting SEO.
  • Transparency Support: Like JXL, WebP fully supports an alpha channel for true transparency, allowing for smooth integration of images with complex backgrounds.
  • Lossless & Lossy Options: WebP offers both lossless compression (for perfect fidelity) and lossy compression (for maximum file size reduction), giving you flexibility.

Key Features of This Converter

Flexible WebP Output

  • • **Batch JXL to WebP:** Convert multiple JXL files simultaneously.
  • • **WebP Compression Modes:** Choose between Lossless or Lossy WebP output.
  • • **Quality Adjustment (Lossy):** Control the compression quality (0-100%) for lossy WebP.

Customization & Control

  • • **Transparency Control:** Choose to preserve transparency (default) or flatten it against a customizable background color.
  • • **Optional Resizing:** Resize images by width, height, or percentage before converting.
  • • **Filename Customization:** Add prefixes or suffixes to your output WebP filenames.
  • • **Download Options:** Download files individually or as a ZIP archive.
  • • **Client-Side Processing:** All processing is done directly in your browser; files are not uploaded.

How to Convert JXL to WebP

  1. Upload JXL Files: Drag and drop your JXL images, or click to select files. The tool will decode them in your browser.
  2. Adjust Settings (Optional):
    • **WebP Options:** Select Lossless or Lossy mode. For Lossy, adjust the quality slider.
    • **Transparency:** Choose whether to preserve transparency (default) or flatten it with a background color.
    • **Resize:** If needed, enable resizing and set new dimensions or a percentage.
    • **Naming:** Add a prefix or suffix for the output filenames.
  3. Convert: Click the Convert JXLs to WebP button.
  4. Download: Download your converted WebP files.

Frequently Asked Questions

What is JXL (JPEG XL)?

JXL (JPEG XL) is a royalty-free raster-graphics file format that supports both lossy and lossless compression. It is designed to be a universal image format, offering better compression than JPEG, GIF, and PNG, while also supporting features like animation, transparency (alpha channel), and progressive decoding.

Will the WebP file be smaller than the original JXL?

It depends. JXL is designed to be highly efficient, often achieving smaller file sizes than WebP, especially for photographic content. If your original JXL was highly compressed (lossy) or contained features that WebP doesn't optimize as well, the resulting WebP might be larger. However, for many use cases, especially with WebP's lossy mode, you can achieve significant file size reductions compared to other older formats.

What happens to transparency in JXL files when converting to WebP?

Both JXL and WebP formats fully support transparency (alpha channel). By default, this tool will preserve the transparency from your JXL file in the output WebP. You have an option to "Flatten Transparency" if you prefer to fill transparent areas with a solid background color.

Are my images uploaded to a server?

No, all image decoding and conversion are performed directly in your web browser using JavaScript and WebAssembly. Your files are not sent to any external server, ensuring your privacy and security.

Why does it take a moment to load JXL files?

Browsers do not natively support JXL. This tool uses a client-side WebAssembly library (`@jsquash/jxl`) to decode the JXL file into raw pixel data that the browser's canvas can understand. This decoding process happens entirely in your browser and can take a few seconds depending on the file size and the performance of your device. The WebAssembly module itself is loaded dynamically on demand.

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