A png to ico converter that never sees your file
Every mainstream ICO converter works the same way: your image uploads to their server, converts there, and a download comes back. This one inverts that. The ICO container — the same byte-level writer behind our favicon generator — is assembled entirely in your browser, so your logo never travels anywhere. Drop the file, tick the sizes, download. That's the whole flow, and it works offline once the page has loaded.
How to convert PNG to ICO
- Drop your image — PNG is typical, but JPG, WebP, and SVG all work (SVG rasterizes sharpest).
- Keep 16 + 32 + 48 checked for a website favicon.ico; add 64–256 for Windows app or shortcut icons.
- Check the live preview — each tile shows the actual pixels each entry will contain.
- Download .ico and drop it in your site root as
/favicon.ico.
High quality at small sizes, on purpose
Each size is rendered independently from your source with contain-fit scaling and full 32-bit alpha — not one big bitmap crudely downscaled six times. That per-size render is what "ico converter high quality" actually means in practice: the 16px entry gets its own careful pass, because that's the one your visitors stare at all day in a browser tab. Transparency survives at every size, so rounded and irregular marks keep clean edges against any tab or desktop background.
Need the whole favicon set?
If the .ico is one piece of a bigger job — the PNG set, the 180px apple-touch-icon, the web manifest, and the head tags — the favicon generator builds the complete pack as one ZIP, from the same dropped image or from a letter or emoji. And if you're making icons for an installable app, the PWA icon packer adds maskable-safe padding and the manifest.json.
Frequently asked questions
Is this PNG to ICO converter free?
Free, no signup, no file limits, and no watermarked "premium" sizes. Drop a PNG (or JPG, WebP, or SVG), tick the sizes you want, and download a real multi-image .ico. It is the same ICO writer that powers our favicon generator, running entirely in your browser.
Is my image uploaded to a server?
No — and that is the honest difference from most converter sites, which upload your file, convert it server-side, and hand back a download. Here the conversion happens in your browser with the file never leaving your machine. Logos are often unreleased brand work; they should not be sitting in a stranger’s server logs.
What sizes should my ICO contain?
For a website favicon, 16, 32, and 48 pixels — the sizes browsers actually read from favicon.ico — and those are pre-checked. Add 64, 128, or 256 if the icon will double as a Windows application or shortcut icon, where the larger entries keep desktop views sharp.
Does it support 256x256 ICO files?
Yes — tick 256 and the file includes a full 256×256 entry, the largest size the ICO format is used for in practice. Transparency is preserved at every size (32-bit color with a full alpha channel), so rounded or irregular icons keep clean edges on any background.
Is a renamed PNG good enough as favicon.ico?
It often appears to work in modern browsers, which sniff the real format — but crawlers, older browsers, and Windows itself expect a genuine ICO container, and a renamed PNG carries only one size. A real multi-image .ico is the compatible answer, and it costs one click here.
Can I convert an SVG logo to ICO?
Yes — drop the SVG and it is rasterized at each selected size from the vector source, which gives you the sharpest possible small sizes (better than downscaling a big PNG). If you also need the full favicon set — PNGs, apple-touch-icon, and the web manifest — use the favicon generator instead; it packs everything as a ZIP.
Build the full favicon pack instead → Converting the other direction? SVG to PNG →