How it works
The browser reads the file with File API, decodes via canvas or WASM codecs, then encodes to the destination mime type without network upload.
How to use PNG to ICO
- Drag or select the source image file supported by this converter.
- Adjust quality, size, or background options shown for the target format.
- Preview the output if the tool provides a side-by-side view.
- Download the converted file — it saves from browser memory, not a server.
Worked examples
Concrete numbers and cases you can check against the tool above.
Favicon refresh
Square 256 PNG logo packs into favicon.ico with 16 and 32 px sizes for a static GitHub Pages site.
When to use PNG to ICO
Browsers still request favicon.ico; ICO bundles 16×16 and 32×32 layers from one source image.
Common use cases
- Refresh a site tab icon after rebranding.
- Produce favicon.ico for legacy IIS hosting.
- Bundle icons before deploying static HTML.
Inputs and outputs
- PNG square logos recommended
- ICO multi-size output
Privacy
This tool runs entirely in your browser. Your data never leaves your device — nothing is uploaded to our servers.
Frequently asked questions
- Is EXIF metadata kept?
- Some conversions strip location EXIF for privacy; check tool notes if GPS preservation matters.
- Is there a file size limit?
- Limits come from device RAM; huge TIFFs may fail on low-memory phones.
- Does transparency survive?
- JPG never keeps alpha; choose PNG or WebP when transparency matters.