How to convert JPG to ICO
- Drag your JPG files into the box above or click “Choose files” (folders and pasting from the clipboard work too).
- ICO is preselected as the output format; adjust quality, size and target file size if you like.
- Press “Start converting”; files are converted in your browser, in parallel.
- Download the files one by one or grab them all as a ZIP.
Why convert JPG to ICO?
ICO is the format needed for your website’s favicon or a Windows application icon; the tool writes sizes from 16 to 256 pixels into one file.
JPG files are already lossy; converting to another lossy format can add generation loss, so keep the quality setting high.
JPG vs ICO
| JPG | ICO | |
|---|---|---|
| File extension | .jpg / .jpeg | .ico |
| Compression | Lossy | Lossless |
| Transparency | No | Yes |
| Animation | No | No |
| Typical file size | Small | Small |
| Support | Everywhere | Windows and browsers |
| Best for | photographs, e-commerce product shots, email attachments | favicons, Windows application icons |
JPG (JPEG) is the most widely used image format, built for photographs and based on lossy compression. ICO is the format used for Windows icons and website favicons; one file can hold several sizes. It is not a general-purpose image format; sizes top out at 256×256 pixels.
Tips for the best results
- Icons must be square; non-square images are cropped from the centre.
- For the web, limiting the width to 1600 pixels cuts file size a lot while keeping visual quality (Resize section).
- Metadata such as GPS location and camera details (EXIF) is always removed from the output.
Privacy and security
Conversion runs entirely in your browser (using WebAssembly); your images are never uploaded to our server and never leave your device. The server only receives anonymous counters that contain no file names or content (source/target format, size, duration). Metadata such as location and camera details is always stripped from the output.