PNG to JXL Converter

Convert PNG images to next-generation JPEG XL format - up to 60% smaller files with lossless compression, transparency support, and HDR. Combine with our PNG Compressor or PNG to WebP converter for flexible web optimization.

Drop your PNG files here

or click to browse files

PNG Batch Upload Lossless
Max 20MB per file • Up to 10 files
Browser Support: Safari 17+ (native), Firefox/Chrome (enable via flags). Use our JXL File Viewer to preview converted files.
Related Tools:
JXL to JPG JPG to JXL PNG to AVIF PNG to WebP Compress PNG

How to Convert PNG to JXL

  1. Upload your PNG images by dragging and dropping or clicking the upload area - batch up to 10 files at once.
  2. Choose Lossless for pixel-perfect archival quality, or Lossy and set your quality level (85% recommended for web use).
  3. Select encoding effort - higher effort produces smaller files but takes more time. Quality (Effort 7) is ideal for most use cases.
  4. Enable Preserve transparency if your PNG has transparent areas. You can also use our PNG Background Remover to add transparency first.
  5. Click Convert to JXL and download your files individually or as a ZIP archive. Use our Image Resizer if you need to resize before converting.
Tip: For web delivery, pair JXL with a WebP or AVIF fallback for browsers without JXL support.

Why JPEG XL Over PNG?

30-60% Smaller Files

JXL achieves significantly better compression than PNG in lossless mode - same quality, much less storage and bandwidth.

Progressive Decoding

JXL images display progressively as they load - unlike PNG which shows nothing until fully downloaded. Great for web performance.

HDR and Wide Gamut

Full HDR, wide color gamut (Display P3, Rec.2020), and 32-bit depth support for professional photography and digital art.

Full Transparency Support

Complete alpha channel support - logos, UI assets, and graphics with transparent backgrounds convert perfectly. Also supports our PNG to ICO workflow for icons.

Encoding Settings Guide

Lossless

Preserves every pixel exactly as in the original PNG. Files typically 30-60% smaller. Perfect for archival, design assets, or images requiring further editing. Transparency fully preserved.

90-100%

Near-lossless quality. Best for photography where slight compression is acceptable. Visually indistinguishable from the original to the human eye. Ideal before converting to JPG to JXL.

75-85%

Excellent balance for web use. Imperceptible quality loss with 70-85% file size reduction vs. PNG. Recommended for most web images, UI assets, and social media.

50-70%

Good for thumbnails, previews, and decorative images where some quality reduction is acceptable. Dramatic file size savings. Pair with Image Resizer for maximum optimization.

Frequently Asked Questions

JPEG XL achieves 30-60% smaller file sizes than PNG in lossless mode with identical quality. This means faster page loads, reduced bandwidth costs, and smaller storage requirements. JXL also supports progressive decoding - images begin displaying while loading, unlike PNG. Use alongside our PNG Compressor if you need to stay in PNG format.

Yes - JPEG XL fully supports alpha channel transparency. Enable "Preserve transparency" in settings to maintain all transparent areas. Perfect for logos, icons, and UI assets. You can also use our PNG Background Remover to add or refine transparency before converting.

Higher effort produces smaller files but takes longer to encode. Effort 3 (Fast) is good for quick batch conversions. Effort 7 (Quality) provides excellent compression and is recommended for most use cases. Effort 9 (Maximum) is best for archival or storage-critical situations - expect 3-5x longer encoding time.

Safari 17+ has native JXL support built in. Firefox and Chrome require enabling experimental flags. JXL is growing rapidly and is excellent for applications where you control the environment. For broader web compatibility, consider generating WebP or AVIF fallbacks alongside your JXL files.

Files are stored only temporarily during conversion and automatically deleted within 4 hours. We do not keep permanent copies or use your images for any other purpose. Download your converted files promptly after conversion.

Yes - our converter supports batch processing of up to 10 PNG files at once. Simply drag and drop multiple files or select them from the file browser. All files use the same quality settings. Download them individually or as a single ZIP archive with a helpful README included.