ICO – Windows Icon
ICO is the Windows icon format, and browsers also use it for favicons. A single .ico file can hold several sizes of the same icon, from 16x16 up to 256x256, so the right one is shown wherever it is needed.
More ICO conversionsDrop your ICO files here
or click to choose ICO files · up to 95MB each
ICO at a glance
| Feature | ICO |
|---|---|
| Full name | Windows Icon |
| Compression | PNG or BMP images inside |
| Transparency | Yes |
| Animation | No |
| Introduced | 1985 |
| Developed by | Microsoft |
| Best for | Favicons and Windows icons |
Convert ICO to…
Document
Ebook
Image
Vector
Video
Convert to ICO from…
Image
- JPG to ICO
- PNG to ICO
- WEBP to ICO
- AVIF to ICO
- TIFF to ICO
- GIF to ICO
- BMP to ICO
- SVG to ICO
- JFIF to ICO
- HEIC to ICO
- HEIF to ICO
- PSD to ICO
- PPM to ICO
- EPS to ICO
- PS to ICO
- ICNS to ICO soon
- XCF to ICO soon
- ODD to ICO soon
- XPS to ICO soon
- 3FR to ICO soon
- ARW to ICO soon
- CR2 to ICO soon
- CR3 to ICO soon
- CRW to ICO soon
- DCR to ICO soon
- DNG to ICO soon
- ERF to ICO soon
- MOS to ICO soon
- MRW to ICO soon
- NEF to ICO soon
- ORF to ICO soon
- PEF to ICO soon
- RAF to ICO soon
- RAW to ICO soon
- RW2 to ICO soon
- X3F to ICO soon
Video
Frequently asked questions
Is it really free?
Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.
Are my files stored?
Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.
Will quality drop?
For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.
How this works: your file is uploaded over HTTPS and converted on this server with open-source engines (libvips for images, FFmpeg for audio and video, LibreOffice and Pandoc for documents, Calibre for ebooks, Ghostscript and Inkscape for PDF and vector files). Images are processed in memory; other files use a private temporary folder that is deleted as soon as the conversion finishes.