JXL
jpegxl.app
Static & Animated JXL to AVIF

JXL to AVIF Converter

Transcode JPEG XL (.jxl) images and animations into AVIF (.avif) locally in your browser using WebAssembly.

Drop .JXL files or a .ZIP archive here

Batch processing supported • Drag & drop files, paste from clipboard (Ctrl+V), or browse

Select Files or .ZIP

Conversion Settings

78

Dedicated JPEG XL Format Converters

Choose a specialized tool for converting to or from JPEG XL (.jxl)

Convert Images to JXL

JPG to JXL

Lossless JPEG recompression & VarDCT

JPG → JXL
PNG to JXL

Static PNG & APNG with transparency

PNG → JXL
WebP to JXL

Static & animated WebP to JXL

WebP → JXL
AVIF to JXL

Static & animated AVIF to JXL

AVIF → JXL
GIF to JXL

Shrink animated GIFs by up to 80%

GIF → JXL

Convert JXL to Other Formats

JXL to JPG

Bit-exact JPEG reconstruction & lossy JPG

JXL → JPG
JXL to PNG

Lossless PNG & animated APNG output

JXL → PNG
JXL to WebP

Convert static & animated JXL to WebP

JXL → WebP
JXL to AVIF

Transcode JXL to AV1 Image Format

JXL → AVIF
JXL to GIF

Animated JXL to 256-color GIF

JXL → GIF

Transcode JPEG XL to AVIF in Your Browser

Need AVIF versions of your JPEG XL assets for an HTML <picture> element or CDN pipeline? Our browser-based JXL to AVIF converter decodes your .jxl files via libjxl and encodes them to AV1 Image File Format (.avif) without uploading anything to a server.

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

FormatLosslessAlphaAnim
JPEG XLYes + JPGYesYes
AVIFYesYesYes
WebPYesYesYes
PNG / APNGOnlyYesAPNG
JPGNoNoNo
GIF256-col1-bitYes

Powered by libjxl (v0.7 WebAssembly) and client-side WebCodecs/WASM image pipelines.

Frequently Asked Questions

Are alpha transparency and animation preserved from JXL to AVIF?

Yes, both alpha transparency and multi-frame sequences are supported when converting JXL to AVIF.

What AVIF quality setting is recommended?

Quality 75–82 offers an excellent balance of visual fidelity and compact file size for web delivery.