Drop a folder, or click to choose images
JPEG · PNG · WebP · AVIF · HEIC · SVG · GIF · JXL · TIFF
Files never uploaded · 100% client-side · I cannot see your photos · Privacy policy
Pipeline ready: JPG → JPEG XL (any input still accepted)
Asset Melt Studio is a JPG to JPEG XL converter that runs entirely on your device. JPEG XL trials from photo libraries — smaller or smarter than JPEG in many tests, but you still need a fallback plan for the public web.
Drop one JPG or a whole folder — the pipeline is already set to JPEG XL using JPEG XL via @jsquash/jxl. That is the JPG to JPEG XL workflow people search for: convert JPG to JPEG XL without an upload, then resize, crop, or hit a size budget (when the codec allows) before you download.
Input is not locked to JPG: you can still open JPEG, PNG, WebP, AVIF, HEIC, GIF, and more in the same session. The JPG to JPEG XL URL simply pre-selects JPEG XL so jpg to jxl jobs start in one click.
A landscape JPEG trialed as JPEG XL.
~91% at web-like quality
Before · JPEG2.8 MB — Photo library
After · JPEG XL260 KB — Lossy trial
Step 1
You are already on the JPG to JPEG XL converter. Output is pre-selected as JPEG XL. You can still drop mixed formats — the JPG to JPEG XL URL is a starting point, not a file-type lock.
Step 2
Drag JPG images onto the studio, click to choose, or paste. Folder drops queue nested images. Then process — JPG to JPEG XL encoding runs in Web Workers on this device.
Step 3
Use the before/after scrubber until the JPG to JPEG XL result looks right. Adjust quality, crop, or resize, then download one JPEG XL or a ZIP of the batch.
| Topic | JPG | JPEG XL |
|---|---|---|
| Public web | JPEG just works | JXL still niche |
| Size | MozJPEG strong | JXL often competitive |
| Size budget | Supported | Supported |
| Encode time | Fast | Slower at high effort |
| Metadata out | Optional keep | Pixels only |
JPG to JPEG XL (JPEG to JXL) is how you trial JXL on a real photo set without a CLI. Encode locally, compare with the scrubber, keep JPEG for shipping.
JPEG XL can recompress JPEG in ways that aim to preserve the original — still treat this as a trial, not a promise of bit-identical reconstruction in every mode.
Size budget works. Metadata: JXL export is pixels-only in Asset Melt.
| Source | Before | After | Note |
|---|---|---|---|
| Phone JPEG | 3 MB JPEG | ~2.1 MB lossless-ish JXL | Varies widely |
| Web-quality JXL | 3 MB JPEG | ~280 KB lossy JXL | Compare to AVIF |
| Need compatibility | 3 MB JPEG | Stay JPEG/WebP | JXL as extra only |
Drop JPEGs. JXL encode in a worker. Effort vs time.
Also export JPEG if you want both in one ZIP.
Do not mass-replace a CDN with JXL-only.
Codec trials and internal archives.
When you want to see JXL vs MozJPEG on your own photos.
Skip JPG to JXL as the only public format in 2026 for general audiences.
Compare at the same display size. If JXL looks like JPEG, the win is bytes and future-proofing, not a new aesthetic.
High effort for one-off heroes.
Keep originals.
Strip GPS on the source JPEG before you publish any derivative.
Image processing is 100% client-side in your browser with WebAssembly. Your photos are not uploaded, I cannot see or recover them, and sampled session replay is UI-only and does not include image pixels (media is blocked). The site still sends usage analytics and crash reports — details are on the privacy page. That includes every JPG to JPEG XL job — the converter never needs your files on a server.
Upload compressors send your bitmap to someone else’s API. Asset Melt keeps jpg to jxl on this device. Session replay, if sampled, is UI-only and does not include image pixels.
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