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Part of:Image Formats Explained: JPG, PNG, WebP, AVIF and More

JPG to JXL Converter

Convert JPG to JXL in your browser including reversible lossless recompression that shrinks 20 to 30 percent and restores the exact JPG.

  • No file limits
  • No registration
  • Free forever
  • Images never leave your browser
JPGJXL
Bulk uploadTurn on to pick several images at once

Drop images here

or paste from clipboard (Ctrl/⌘ + V)

Supported formats: JPG, PNG, WebP, AVIF, SVG

Processing…

Your images never leave your browser

All processing happens locally on your device. Nothing is uploaded to a server, stored, or tracked.

The flagship JXL move: recompress JPG photos losslessly, saving 20 to 30 percent with byte for byte reversible output. The original JPG can be recovered exactly.

How it works

Why convert JPG to JXL?

The flagship JXL move: recompress JPG photos losslessly, saving 20 to 30 percent with byte for byte reversible output. The original JPG can be recovered exactly.

How JXL compares to JPG

JXL is generally similar in nature to JPG. The main differences are file size, quality characteristics, and transparency support.

Quality recommendations

For JXL output, start at the lossless preset and adjust to taste. A lower quality setting shrinks the file further; a higher one keeps more detail. Keep the original JPG file for archival edits.

Is conversion private?

The JXL recompression runs entirely on your device. Your JPG is read locally and never leaves your browser.

Batch convert JPG to JXL

Recompress a batch of JPG photos into JXL with reversible 20 to 30 percent savings. Free, private, batch ZIP, and no uploads.

Frequently asked questions

What is reversible lossless JXL?

JXL can store the original JPG bitstream inside, so the file shrinks 20 to 30 percent and the exact original JPG can be recovered bit for bit.

Will my JPG look different as JXL?

In lossless reversible mode no, the pixels are preserved exactly and the original JPG can be restored. Lossy modes shrink further with small change.

Can I batch recompress many JPGs without uploading

Yes. Add your JPG folder, choose lossless reversible, and recompress together. All processing happens locally in your browser and you can download a ZIP. Estimate savings with the image file size calculator.

Will converting to JXL degrade quality?

Every JXL re-encode discards a little detail. Keep your original file if you might re-edit it later.