Compress JXL

Compress JPEG XL images online for free. JXL offers superior compression compared to traditional formats. Reduce file sizes while maintaining excellent quality with our adjustable settings. Need to convert first? Try our JXL to JPG converter or PNG to JXL converter.

Drop your JXL files here

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JXL JPEG XL Batch Upload
Max 25MB per file - Up to 10 files
Related Tools:
JXL to JPG JXL to PNG JPG to JXL PNG to JXL JXL Analyzer Compress AVIF Compress WebP

How to Compress JXL Images

  1. Upload your JXL images by dragging and dropping or clicking the upload area. You can select up to 10 files at once for batch processing.
  2. Choose compression mode: Select lossy for maximum file size reduction or lossless for perfect quality preservation with optimized encoding.
  3. Adjust quality and effort: Set the quality level for lossy mode. Higher effort means better compression but slower processing.
  4. Optional resize: Enable resizing to reduce dimensions along with compression for even smaller files.
  5. Compress and download: Click the compress button and download individual files or all as a ZIP archive.
Pro tip: Use our JXL Analyzer first to check your image properties, or convert from other formats using our JPG to JXL or PNG to JXL converters.

Effort Levels Explained

1-3

Fast encoding. Quickest processing time but less optimal compression. Good for quick previews or when processing many files. Similar to our fast JPG compressor mode.

4-6

Balanced. Good trade-off between speed and compression ratio. Suitable for most use cases including web images and general photography.

7-9

Maximum compression. Best file size reduction but slower processing. Ideal for archival, final production, or when storage space is critical. Compare with our PNG compressor for lossless needs.

JXL vs Other Modern Formats

JXL

JPEG XL offers the best overall compression for both lossy and lossless modes. Supports HDR, animation, progressive decoding, and can losslessly transcode existing JPEGs. Limited browser support currently.

WebP

WebP has excellent browser support and good compression, but JXL typically achieves 20-30% better compression at the same quality. Try our WebP compressor for broader compatibility.

AVIF

AVIF offers similar compression to JXL but with slower encoding and no progressive decode. Good for photos. See our AVIF compressor for this format.

Quality Settings Guide

90-100%

Near-lossless quality with minimal compression. Best for source files, professional photography, and archival. Consider our Image Upscaler if you need to enhance resolution.

75-89%

High quality with good compression. Excellent for most photography, web galleries, and general use. Artifacts are typically invisible.

60-74%

Good balance of quality and file size. Perfect for web images, social media, and content delivery. Use our Image Resizer to further optimize.

Below 60%

Aggressive compression with visible artifacts. Only use when file size is critical, such as thumbnails or mobile-first designs.

Frequently Asked Questions

JPEG XL is a next-generation image format designed to replace legacy JPEG. It offers significantly better compression, HDR support, animation, and both lossy and lossless modes. While browser support is still growing, it's excellent for archival and progressive enhancement. Learn more in our JXL converters guide.

Results vary by image content, but you can typically expect 20-60% file size reduction for lossy compression at equivalent visual quality, and 10-30% for lossless re-encoding. Images with smooth gradients compress better than those with fine details.

Effort controls the encoding time vs compression efficiency trade-off. Higher effort (7-9) produces smaller files but takes longer. Lower effort (1-3) is faster but produces larger files. For final production, use high effort; for quick work, use lower values.

Yes! JPEG XL fully supports alpha channels for transparency, making it suitable for logos, icons, and graphics with transparent backgrounds. It's a great alternative to PNG compression for transparent images.

JXL browser support is currently limited. Safari has partial support, and other browsers may require flags. For web use, consider converting to WebP or using JXL with fallbacks. It's excellent for apps, archival, and progressive enhancement.

Yes, each file can be up to 25MB in size, and you can upload up to 10 files at once for batch processing. For larger files, consider using the resize option to reduce dimensions, which also reduces processing time.

Absolutely! Use our JPG to JXL, PNG to JXL, or WebP to JXL converters to convert images to JPEG XL format. You can also convert JXL back to other formats with our JXL converter tools.