What's the difference between JPG and JPEG XL?

JPG (also written JPEG) is the workhorse lossy format for photographs. JPEG XL is a modern, royalty-free image format with state-of-the-art compression.

What quality should I pick?

For JPEG XL, quality 75-85 is the sweet spot — small files with no visible difference from the original. Lower than 60 starts to show artifacts. Higher than 90 mostly just makes the file bigger.

Why convert away from JPG?

JPG (also written JPEG) is the workhorse lossy format for photographs. Where it falls down: anything that needs transparency (use PNG or WebP); screenshots and text-heavy images (compression artifacts around sharp edges); repeated re-saving — each save loses more detail. JPEG XL addresses that for most workflows.

When is JPEG XL the right format?

JPEG XL is a good choice for: high-quality archival images at small sizes; losslessly shrinking existing JPEG libraries; workflows where you control decoding (apps, pipelines). It is a poor choice when broad web delivery today (inconsistent browser support).

Anything surprising about JPG or JPEG XL?

JPG quality 80–85 is usually visually indistinguishable from the original. Don't ship q100. And on the JPEG XL side: JPEG XL can recompress a JPEG losslessly ~20% smaller and restore the exact original.

Does this work on mobile?

Yes. The drop zone falls back to your phone's file picker, and conversions run on-device just like desktop. Large files may be slower on mobile due to CPU and memory constraints, but the workflow is identical.

What's the maximum file size?

No hard limit — the browser handles it. Files under 50MB convert in a few seconds. Larger files work but may take longer as the browser allocates memory. If you hit issues, batch in smaller groups.

Convert JPG to JPEG XL

Convert JPG to JPEG XL for smaller files with no visible quality loss. Note that JPG has already discarded detail, so this won't recover it — it just repackages what's left more efficiently. Free, in your browser.

Drop images to convert

PNG, JPG, WebP, AVIF, JPEG XL, TIFF, BMP, GIF, SVG, HDR, ICO — any combination

Files stay on your device. Open DevTools' Network tab to verify.

Output format

JPEG XL

Quality82%

Overview

Why convert JPG to JPEG XL

JPEG XL files are typically much smaller than JPG at equivalent quality — usually the main reason to make this conversion. Smaller files mean faster page loads, smaller email attachments, and less storage. Note that JPG has already discarded detail, so this won't recover it — it just repackages what's left more efficiently.

Comparison

JPG vs JPEG XL: what actually differs

JPG compared with JPEG XL across encoding, fidelity, file size and support.
Attribute	JPG	JPEG XL
Compression	Lossy	Lossy or lossless
Transparency	No	Yes
Animation	No	Yes
Typical file size	Medium	Small
Browser support	Universally supported. It's been there since the first browsers.	Limited — Safari 17+ supports it; Chrome and Firefox are still behind flags or pending. Great for archival and apps that control their own decoder.

How to

How to convert JPG to JPEG XL

01
Drop your JPG files
Drag one or more JPG files onto the dropzone above, or click to browse. Files stay on your device — nothing uploads.
02
Convert in your browser
convert.now decodes each JPG and re-encodes it as JPEG XL via WebAssembly. The conversion runs in a Web Worker so the page stays responsive.
03
Download the result
Download a single JPEG XL file or, for batch conversions, a zip of all converted files. Filenames preserve the originals.

Why here

Why convert.now

Private
Files stay in your browser. No upload step. Nothing for anyone to see.
Fast
No queue, no upload wait. Conversion starts the moment you drop a file.
Free
No ads. No file-count limit. No sign-up wall. Just the converter.

FAQ

JPG to JPEG XL: common questions

No. The conversion from JPG to JPEG XL runs entirely in your browser using WebAssembly. Files never leave your device. Open DevTools' Network tab if you'd like to verify — there are no network requests with file contents.

Related JPG converters

Last updated 27 August 2026

Why convert JPG to JPEG XL

JPG vs JPEG XL: what actually differs

How to convert JPG to JPEG XL

Drop your JPG files

Convert in your browser

Download the result

Why convert.now

JPG to JPEG XL: common questions

Related JPG converters