Convert PNG images to ICO favicon format- perfect for websites, free and instant.
Open Image ConverterEvery website needs a favicon, and the ICO format remains the most universally supported favicon format across all browsers, including older versions of Internet Explorer. While modern browsers accept PNG favicons, ICO files can contain multiple resolutions (16x16, 32x32, 48x48) in a single file, ensuring your icon looks crisp everywhere- from browser tabs to bookmark bars to desktop shortcuts.
ICO files store pixel data at multiple resolutions. The conversion from PNG is lossless at each resolution- omnikitbolt generates crisp, perfectly scaled icons from your source PNG. For best results, start with a square PNG of at least 256x256 pixels.
| Format | File Size | Quality | Compatibility | Use Case |
|---|---|---|---|---|
| PNG | Medium | Lossless | Universal | Modern favicons, web graphics, design assets |
| ICO | Small (multi-resolution) | Lossless per resolution | Universal (all browsers) | Website favicons, Windows desktop icons |
| SVG | Tiny (vector) | Perfect at any scale | Modern browsers only | Scalable favicons (latest browsers) |
| WEBP | Small | High | Modern browsers | Next-gen web images |
Open the PNG to ICO converter
Click the button above or go directly to /tools/compress. No signup required- the tool is free and works instantly in your browser.
Drop your files
Drag and drop your PNG files onto the upload area, or click to browse. You can convert up to 20 files at once on the free plan (500 on Pro).
Download your ICO files
Click Download on each file or use Download All as ZIP to save everything at once. All processing happens in your browser- nothing is uploaded to a server.
Complete privacy
Your files never leave your device. All conversion happens inside your browser using the Canvas API and WebAssembly.
Instant results
No upload, no queue, no waiting for a server. Conversion starts the moment you drop your files.
True batch processing
Convert up to 20 files at once on free (500 on Pro) and download them all as a ZIP. No signup required.
Always free
Core conversion tools are free forever. No watermarks, no file size caps on common formats, no account required.
What size should my PNG be for a good favicon?
Start with a square PNG of at least 256x256 pixels. omnikitbolt will automatically generate the standard favicon sizes (16x16, 32x32, 48x48) from your source image. The higher the source resolution, the better the downscaled icons will look.
Do I still need ICO favicons in 2026?
For maximum compatibility, yes. While modern browsers support PNG and even SVG favicons, ICO remains the only format guaranteed to work in all browsers, including legacy ones. Many SEO and testing tools also check specifically for favicon.ico.
Can an ICO file contain multiple sizes?
Yes- that is the main advantage of ICO over PNG for favicons. A single ICO file can contain 16x16 (browser tab), 32x32 (bookmark bar), and 48x48 (Windows taskbar) versions, and the browser picks the right size automatically.
How do I add the ICO favicon to my website?
Place the favicon.ico file in your site's root directory. Most browsers will find it automatically. You can also add `<link rel="icon" href="/favicon.ico">` to your HTML head for explicit declaration.
Ready to convert? It takes less than 10 seconds.
Open Image Converter.svg){kind=small}