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
Output pre-selected: JPEG XL — drop any supported image
This Studio link pre-selects JPEG XL so you can convert to JPEG XL immediately. Convert to JPEG XL when you are trialing a next-gen still, not when you need a public `<img>` that works for everyone. Size budget is supported; browser support is not universal.
Bring JPEG, PNG, WebP, AVIF, HEIC, GIF, SVG, and more — input format is never blocked when you convert to JPEG XL. Encoding uses JPEG XL via @jsquash/jxl.
Looking for a specific source format? Use deep links like PNG to JPEG XL or HEIC to JPEG XL for conversion-focused copy, or stay here when your batch is mixed and you still want to convert to JPEG XL.
A phone UI PNG converting to JPEG XL for an archive trial.
~34% in this lossless-style example
Before · PNG380 KB — Oxipng UI
After · JPEG XL250 KB — Lossless-style
Step 1
This page already set output to JPEG XL. You can convert to JPEG XL from JPEG, PNG, WebP, AVIF, HEIC, GIF, TIFF, BMP, SVG, and more in one queue.
Step 2
Add files or a folder. When you convert to JPEG XL, decode and encode stay in the browser — nothing is uploaded.
Step 3
Scrub quality, optionally set a size budget (JPEG, WebP, AVIF, JXL, PNG palette search), then download one file or a ZIP after you convert to JPEG XL.
| Topic | What you get | Note |
|---|---|---|
| Public web | Limited | Keep fallbacks |
| Lossless vs PNG | Often smaller JXL | Why people convert to JXL |
| Size budget | Supported | When you convert to JPEG XL |
| Metadata | Pixels only | Inspect source |
| Encode time | Rises with effort | Workers help |
Convert to JXL (JPEG XL) from PNG for smaller lossless-friendly archives, or from JPEG to see if JXL beats MozJPEG on your photos.
Convert to JPEG XL is a studio experiment you can run privately. Do not delete JPEG/WebP masters.
JXL export is pixels only — no EXIF round-trip.
| Source | Before | After | Note |
|---|---|---|---|
| UI PNG | 220 KB PNG | ~160 KB JXL | Lossless-style |
| JPEG photo | 3 MB JPEG | ~280 KB lossy JXL | Trial vs AVIF |
| Need compatibility | Any | Also export JPEG/WebP | Do not JXL-only |
Drop mixed inputs. @jsquash/jxl encodes. Effort costs time.
Size budget works when you convert to JPEG XL.
Also export WebP/JPEG so the ZIP still has shippable files.
Codec trials and JXL-aware tools.
When convert to PNG lossless is still heavy and you control the decoder.
Skip convert to JXL as the only format on a public marketing site in 2026.
Inspect lossless vs lossy modes in preview. Support, not a 2% size win, should decide whether you ship JXL.
High effort for one-off tests when you convert to JXL.
Keep originals.
Do not expect Instagram to accept JXL.
When you convert to JPEG XL, 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.
Convert to JPEG XL never uploads the bitmap. GIF still uses the first frame only. TIFF uses the first page only. HEIC decodes to pixels via libheif before you convert to JPEG XL.
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