Convert JP2 to JXL
Convert JP2 files to JXL locally, completely free and with maximum privacy.
Drag and drop your files here
or click to browse local files (large files supported, limited only by browser RAM)
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How to convert JP2 to JXL
- Drop your .jp2 files above, or click Upload Files. You can add many files at once.
- JXL is already selected as the output. Open the settings (gear icon) to fine-tune the result.
- Click Convert All. ImageMagick runs inside your browser through WebAssembly; nothing is uploaded.
- Download your .jxl files as soon as each one finishes.
What to know about JP2 to JXL conversion
- JXL supports both lossy and lossless compression and typically produces smaller files than older formats at the same visual quality.
- Transparency is preserved: JXL supports an alpha channel just like JP2.
- JXL is best for next-generation photos, including lossless recompression of JPEGs, and opens in Safari 17+, recent image editors and viewers.
JP2 vs JXL
| Feature | JP2 (JPEG 2000) | JXL (JPEG XL) |
|---|---|---|
| Compression | lossy or lossless | lossy or lossless |
| Transparency | Yes | Yes |
| Animation | No | Yes |
| Best for | medical imaging, digital cinema and archives | next-generation photos, including lossless recompression of JPEGs |
| Opens in | specialized viewers, GIMP and Photoshop | Safari 17+, recent image editors and viewers |
JP2 (JPEG 2000): A wavelet-based image format used in digital cinema, medical imaging, and archival workflows.
JXL (JPEG XL): A next-generation image compression format designed to replace legacy JPEG with smaller file sizes and better quality.
Conversion options
- Quality (1–100)
- Resize by width, height or both (aspect ratio is preserved)
- Filters: grayscale, sepia, blur and sharpen
- Custom output file name
Frequently asked questions
Is it safe to convert JP2 to JXL here?
Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.
Is there a file size limit?
There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.
Can I convert several JP2 files at once?
Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.
Related conversions
Need the opposite? Convert JXL to JP2.
Convert JP2 to other formats
- JP2 to JPG
- JP2 to PNG
- JP2 to PDF
- JP2 to WEBP
- JP2 to GIF
- JP2 to SVG
- JP2 to AVIF
- JP2 to ICO
- JP2 to TIFF
- JP2 to BMP
- JP2 to PSD
- JP2 to TGA
Convert other formats to JXL
- JPG to JXL
- PNG to JXL
- PDF to JXL
- WEBP to JXL
- HEIC to JXL
- GIF to JXL
- SVG to JXL
- AVIF to JXL
- ICO to JXL
- TIFF to JXL
- BMP to JXL
- PSD to JXL
See every JP2 converter and JXL converter, or browse the full converter directory.