Convert PNG to JPEG XL for dramatically smaller lossless files- free, browser-based.
Open JXL ConverterJPEG XL lossless compression produces files approximately 35% smaller than PNG while maintaining identical quality. For large PNG files (screenshots, design assets, medical images), converting to JXL can save significant storage space.
At quality 100, JXL operates in lossless mode- every pixel is preserved exactly. At lower quality settings, JXL uses lossy compression for even smaller files with minimal visual impact.
| Format | File Size | Quality | Compatibility | Use Case |
|---|---|---|---|---|
| PNG | Large | Lossless | Universal | Graphics, logos, screenshots |
| JXL | Smaller (35% less) | Lossless or lossy | Safari 17+, growing | Efficient storage, next-gen web |
| WebP | Medium | Lossless or lossy | 97%+ browsers | Web delivery |
Open the PNG to JPEG XL converter
Click the button above or go directly to /tools/jxl. No signup required- the tool is free and works instantly in your browser.
Drop your files
Drag and drop your PNG files onto the upload area, or click to browse. You can convert up to 20 files at once on the free plan (500 on Pro).
Download your JPEG XL files
Click Download on each file or use Download All as ZIP to save everything at once. All processing happens in your browser- nothing is uploaded to a server.
Complete privacy
Your files never leave your device. All conversion happens inside your browser using the Canvas API and WebAssembly.
Instant results
No upload, no queue, no waiting for a server. Conversion starts the moment you drop your files.
True batch processing
Convert up to 20 files at once on free (500 on Pro) and download them all as a ZIP. No signup required.
Always free
Core conversion tools are free forever. No watermarks, no file size caps on common formats, no account required.
Is JXL lossless like PNG?
Yes, JXL supports lossless compression. At quality 100, every pixel is preserved identically. The resulting file is about 35% smaller than the equivalent PNG.
Does JXL support transparency?
Yes. JPEG XL fully supports alpha channels (transparency), unlike JPEG. Converting transparent PNGs to lossless JXL preserves the alpha channel.
Should I convert my PNG assets to JXL?
If your target audience uses Safari 17+ or you can serve JXL with fallbacks, yes. JXL saves ~35% over PNG losslessly. For universal compatibility today, WebP lossless is a safer bet.
Ready to convert? It takes less than 10 seconds.
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