Convert ICO to JP2
Convert ICO files to JP2 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 ICO to JP2
- Drop your .ico files above, or click Upload Files. You can add many files at once.
- JP2 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 .jp2 files as soon as each one finishes.
What to know about ICO to JP2 conversion
- JP2 supports both lossy and lossless compression and typically produces smaller files than older formats at the same visual quality.
- Transparency is preserved: JP2 supports an alpha channel just like ICO.
- JP2 is best for medical imaging, digital cinema and archives, and opens in specialized viewers, GIMP and Photoshop.
ICO vs JP2
| Feature | ICO (Windows Icon) | JP2 (JPEG 2000) |
|---|---|---|
| Compression | lossless | lossy or lossless |
| Transparency | Yes | Yes |
| Animation | No | No |
| Best for | website favicons and Windows icons | medical imaging, digital cinema and archives |
| Opens in | browsers, Windows and icon editors | specialized viewers, GIMP and Photoshop |
ICO (Windows Icon): An image file format for computer icons, widely used as website favicons.
JP2 (JPEG 2000): A wavelet-based image format used in digital cinema, medical imaging, and archival workflows.
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 ICO to JP2 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 ICO 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 JP2 to ICO.
Convert ICO to other formats
- ICO to JPG
- ICO to PNG
- ICO to PDF
- ICO to WEBP
- ICO to GIF
- ICO to SVG
- ICO to AVIF
- ICO to TIFF
- ICO to BMP
- ICO to JXL
- ICO to PSD
- ICO to TGA
Convert other formats to JP2
- JPG to JP2
- PNG to JP2
- PDF to JP2
- WEBP to JP2
- HEIC to JP2
- GIF to JP2
- SVG to JP2
- AVIF to JP2
- TIFF to JP2
- BMP to JP2
- JXL to JP2
- PSD to JP2
See every ICO converter and JP2 converter, or browse the full converter directory.