ICO to QOI converter
A free ICO to QOI converter for Windows Icon files. Browser-based pairs here usually run in this tab, with no file upload.
Drop your ICO files here
or browse your device · paste with Ctrl+V
Accepts .ico files. You can queue several files; each is processed one after another on your own device.
Your files never leave this device — there is no upload and no server to delete them from.
- 01
Add your ICO files
Drop them onto the box above or click to browse. They are read straight from disk — nothing is sent anywhere.
- 02
Check the settings
QOI is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
Download your QOI
Press convert and wait for the row to finish. Convert several files and you can take them all as a single ZIP.
ICO
Windows IconA container holding several sizes of the same icon so Windows and browsers can pick the right one. A favicon.ico bundling 16, 32 and 48 pixel versions is still the most reliable site icon there is.
- Developed by
- Microsoft
- Released
- 1985
- Extension
- .ico
- MIME type
- image/x-icon
- Compression
- Lossy or lossless
QOI
Quite OK Image FormatA lossless format whose entire specification fits on one page, encoding and decoding many times faster than PNG for a small size penalty. A favourite in game engines and hobby projects.
- Developed by
- Dominic Szablewski
- Released
- 2021
- Extension
- .qoi
- MIME type
- image/qoi
- Compression
- Lossless
- Specification
- Open
- QOI stores the incoming samples as provided, so this step does not add generic quality loss. If the source ICO was already lossy, those earlier losses remain.
Questions about converting ICO to QOI
Is this ICO to QOI converter free?
Yes. Converting ICO to QOI here is free, with no account, no watermark and no daily quota. The work runs on your own device, so there is no server cost to pass on to you.
Is my ICO file uploaded anywhere?
For browser-based pairs, your file is read locally and converted by Squoosh in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
Is there a file-size limit for ICO to QOI?
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
Does converting ICO to QOI lose quality?
No. QOI stores its data losslessly, so everything in your ICO file is preserved exactly.
Can I convert several ICO files to QOI at once?
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
Does ICO to QOI work on a phone, Mac or Chromebook?
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
Convert other formats to QOI
16 formats can become QOI here.
Convert ICO to other formats
A ICO file can become any of these.
QOI to ICO
The reverse conversion
ICO to JPG
ICO to PDF
ICO to PNG
Images to PDF
Turn photos or scans into a single PDF document.…
Compress Image
Make images smaller while keeping the same format.…
Resize Image
Change the pixel dimensions of one image or a whole …
Rotate & Flip Image
Turn images by 90 degrees or mirror them.…