PNG to JXL Converter
Convert PNG and animated APNG images to JPEG XL (.jxl) with full alpha transparency. Achieve 35–50% smaller lossless files or up to 80% smaller lossy files.
Drop .PNG / .APNG files or a .ZIP archive here
Batch processing supported • Drag & drop files, paste from clipboard (Ctrl+V), or browse
Conversion Settings
75–85 matches visually lossless JPEG
1 = Fast (Lightning) • 7 = Default (Squirrel)
Dedicated JPEG XL Format Converters
Choose a specialized tool for converting to or from JPEG XL (.jxl)
Convert Images to JXL
Convert JXL to Other Formats
Superior PNG & APNG Compression with JPEG XL
PNG uses legacy DEFLATE compression from the 1990s. JPEG XL's Modular mode replaces PNG with context-adaptive predictors and ANS entropy coding, shrinking lossless PNG screenshots, UI assets, and illustrations by 35% to 50% while keeping every RGBA pixel identical.
100% Local Privacy
Powered by WebAssembly (`libjxl`). Your images are processed inside your browser tab and never uploaded to any cloud server.
Reversible JPEG Recompression
Losslessly transcode existing `.jpg` files into `.jxl` (~20% smaller) and reconstruct the exact bit-for-bit `.jpg` whenever needed.
Batch & ZIP Archive Workflow
Drop dozens of images or a `.zip` archive at once. Download converted files individually or bundled in a single `.zip`.
Animation & Alpha Support
Full support for multi-frame animations and alpha transparency across JXL, APNG, GIF, WebP, and AVIF.
Format Capabilities Matrix
| Format | Lossless | Alpha | Anim |
|---|---|---|---|
| JPEG XL | Yes + JPG | Yes | Yes |
| AVIF | Yes | Yes | Yes |
| WebP | Yes | Yes | Yes |
| PNG / APNG | Only | Yes | APNG |
| JPG | No | No | No |
| GIF | 256-col | 1-bit | Yes |
Powered by libjxl (v0.7 WebAssembly) and client-side WebCodecs/WASM image pipelines.
Frequently Asked Questions
Is alpha transparency preserved when converting PNG to JXL?
Yes. JPEG XL natively supports 8-bit and 16-bit alpha channels in both lossless Modular mode and lossy VarDCT mode.
Does PNG to JXL preserve animated APNG files?
Yes! Multi-frame APNG animations are automatically detected and encoded as multi-frame animated JPEG XL (.jxl) files with frame timings preserved.
Should I choose Lossless or Lossy for PNG to JXL?
Enable "Lossless Encoding" when archiving pixel-exact graphics or sprites. Leave it unchecked at Quality 82–90 for web photography and UI graphics where a 70% size reduction is desired.