Skip to main content
Rebytify Rebytify
Free · Private · Browser-based

Bulk JPG to JXL Converter

Batch-convert JPG photos to JPEG XL at once - free, no signup, and no upload. Encoding happens locally in your browser. JXL is designed as the successor to JPG: at the same visual quality it typically produces files 30-60% smaller, with fewer blocky artefacts and support for HDR and wide colour. Note that this tool re-encodes the decoded pixels, so it is a lossy-to-lossy step; for a bit-exact, reversible JPEG recompression you need a dedicated tool such as cjxl.

Drop images here

or browse files

PNG, JPG, WebP, AVIF, HEIC, JXL · Larger batches may take longer to process

Target size

Output format

JPG→JXL·Conversion happens entirely in your browser

Other conversions

PNG to JPGPNG to WebPPNG to AVIFPNG to JXLJPG to PNGJPG to WebPJPG to AVIFWebP to PNGWebP to JPGWebP to AVIFWebP to JXLAVIF to PNGAVIF to JPGAVIF to WebPAVIF to JXLHEIC to PNGHEIC to JPGHEIC to WebPHEIC to AVIFHEIC to JXLJXL to PNGJXL to JPGJXL to WebPJXL to AVIF

Frequently asked questions

How much smaller is JXL than JPG?
At equivalent visual quality JXL is commonly 30-60% smaller than JPG for photographs, depending on content and settings.
Is this the lossless JPEG recompression?
No. Rebytify decodes your JPG to pixels and encodes new JXL data, so there is a small generational loss at lossy settings. The lossless transcode, which is reversible back to the original JPG, is a feature of the cjxl command line tool.
Which quality should I choose?
Around 85 is a good starting point for photographs. Use the target file size option if you need to hit a specific limit.