Online Image to ICO Converter
Convert PNG, JPG, WebP, BMP, GIF to ICO icon files. Supports multi-size favicon generation. Everything happens in your browser — no upload, no server, no nonsense.
About this tool
Your images never touch a server
Everything runs right inside your browser. Nothing gets uploaded, nothing gets stored. Close the tab and it's all gone.
Works with all common formats
PNG, JPG, WebP, BMP, GIF, SVG — drop any of them and get a proper ICO file out.
Multi‑size ICO support
Generate ICO files that pack multiple sizes (16×16 up to 256×256), covering every favicon use case.
Instant results
No loading bars, no waiting. The conversion happens the moment you drop an image. Multiple sizes are generated in parallel.
Completely free
No sign‑ups, no payments, no watermarks. Use it as many times as you want.
Works on mobile too
Responsive design that feels natural on phones, tablets, and desktops. Convert icons wherever you are.
Why I built this tool
I work on a lot of side projects, and I kept needing to turn a PNG into a favicon.ico. The online converters I tried either wanted me to log in, slapped a watermark on the output, or clearly uploaded the image to a server (because it took several seconds). I thought — this is something the browser can do on its own. So I spent a weekend putting it together with the Canvas API, dropped it into my own toolbox, and eventually spun it out when friends kept asking for it.
That's why this page has no backend, no database, no user accounts, and no analytics scripts. You drop an image, the conversion runs right on your machine, and that's it. The way it should be.
Our privacy promise
- No image uploads: Everything happens locally in your browser. We never see your files.
- No storage: No servers, no databases. When you close this page, there's no trace left behind.
- No tracking: This page doesn't track your behavior. There are no analytics scripts (normal HTTP requests from links are all that happen).
- Open for inspection: If you're technical, you can view the page source — all the logic is right there in the JavaScript.
Frequently asked questions
What is an ICO file?
ICO is the icon file format used by Windows, and it's the standard for website favicons (the little icon you see in browser tabs). One ICO file can hold multiple image sizes, and the system picks the best one automatically. Modern ICO files use PNG compression inside, so they're small but sharp.
Why do I need multiple sizes in one ICO?
Different places need different sizes. A browser tab might use 16×16 or 32×32, while a desktop shortcut might pull a 64×64 or even 256×256 version. A multi‑size ICO makes sure your icon looks crisp everywhere.
Does this produce old BMP‑style ICOs or modern PNG‑based ones?
We generate modern ICO files with PNG data embedded. Old ICOs used BMP images which were large and lossy. The current standard embeds PNGs, which keep your transparency and compress well. Every size inside the ICO you download is a clean PNG wrapped in the ICO container.
How do I use this tool?
It's dead simple:
- Upload: Click the upload area or drag an image onto it. PNG, JPG, WebP — all fine.
- Choose sizes: The Favicon Set (16+32+48) is usually all you need. You can also pick a single size or type your own.
- Handle shape: If your image isn't square, choose center crop, letterbox, or stretch.
- Download: Hit the button and you'll get a favicon.ico file.
Do my images get uploaded to a server?
No. The whole conversion runs inside your browser. We have no way to see your images, and nothing is stored. It's as private as it gets.
Does it keep transparency?
Yes. If you upload a PNG or WebP with an alpha channel, the resulting ICO will keep that transparency. That's important for favicons that need to look good on both light and dark browser themes.
What file name does it use?
The download is always named favicon.ico. That's the standard name browsers look for. Drop it in your site's root folder, or link to it with <link rel="icon">.