Convert JPEG to ICO — free, private, in your browser
Decoded with MozJPEG, encoded with ImageMagick WASM — entirely on your device. No upload, no queue, no watermark.
Why convert JPEG to ICO?
Convert JPEG (the universal photo format. small files, opens everywhere, no transparency) to ICO. Drop files below: decoding and encoding run entirely in your browser via WebAssembly, so images are never uploaded to a server.
How to convert JPEG to ICO
- 1Drop your JPEG files onto the tool above (or click to browse, or paste from the clipboard). Batches are fine.
- 2ICO is pre-selected as the output. ICO is lossless, so there is no quality to lose. Optionally cap the maximum dimension to also downscale.
- 3Each file converts in your browser and shows its new size. Download files individually or grab everything as a ZIP.
JPEG vs ICO
| JPEG | ICO | |
|---|---|---|
| Introduced | 1992 (Joint Photographic Experts Group) | 1985 (Microsoft) |
| Compression | Lossy | Lossless |
| Transparency | No | Yes |
| Animation | No | No |
| HDR / wide gamut | No | No |
| Browser display | All browsers | All browsers |
| Typical use | Photographs on the web | favicon.ico |
About JPEG full guide →
The universal photo format. Small files, opens everywhere, no transparency.
About ICO full guide →
The favicon and Windows icon container format.
Frequently asked questions
Is it safe to convert JPEG to ICO online?+
With EditItAll, your files are never uploaded: decoding and encoding run inside your browser using WebAssembly (Squoosh-grade codecs (MozJPEG, libwebp, libavif, libjxl, OxiPNG) to decode, ImageMagick compiled to WebAssembly to encode). The images stay on your device from start to finish, and the whole thing works offline once the page has loaded.
Will converting JPEG to ICO lose quality?+
No. ICO is lossless: every pixel of the decoded JPEG is preserved exactly.
Is there a file size or count limit?+
No hard limits and no accounts — processing uses your own device's memory and CPU, so very large images are only constrained by your browser (multi-hundred-megapixel images may fail on low-memory devices). Batch as many files as you like; they are processed in sequence.
Can I convert ICO back to JPEG?+
Yes — use the ICO to JPEG converter, or just change the output format dropdown after dropping files.