Convert ICO
Windows icon file. Written here as a single PNG-in-ICO. Every pair below runs in the browser. The file is not uploaded. Stills use jSquash (MozJPEG, OxiPNG, WebP, AVIF) and the canvas in this tab. There is no upload bar because there is no server to receive the bytes.
This hub is the index, not the workbench. Each conversion is its own URL so a search for “ICO to something” can land on a page that only does that job. The file picker on those pages expects ICO when you are leaving this format, or produces ICO when you are arriving. A generic dropdown still exists under Video convert and Audio convert if you would rather pick the destination after you drop the file.
You can check the same way on every pair: open the network panel, drop a ICO file, convert it. You should see this origin. You should not see a POST of the file. Google Analytics, if it is on, is page views — not your ICO bytes. If a tool needs a server, it is not on this site.
This site can read it. This site can write it. Engine: canvas.
Convert from ICO
Convert to ICO
- JPG to ICOThe usual photographic JPEG. No transparency.
- PNG to ICOLossless stills, including transparency.
- WebP to ICOA smaller web still that can keep transparency.
- AVIF to ICOOften smaller than WebP at the same viewing size.
- HEIC to ICOApple's default still format on iPhone.
- BMP to ICOUncompressed bitmap. Huge, simple, still used in scanning.
- GIF to ICOThe first frame of a GIF. Animation is not written back.
- SVG to ICOVector markup, rasterized to pixels. I do not trace photos into SVG.
Related: Convert · All formats · How it works