How do I convert a PNG to an ICO file for free?

Drop a PNG, JPG, WebP or SVG image on the page, pick the icon sizes and click Generate. You download a single favicon.ico that holds every size you chose. It is free and needs no sign-up.

Which sizes does the ICO include, and is transparency kept?

You can include 16, 32, 48, 64, 128 and 256 px; the default set is 16, 32, 48 and 256. Transparent areas stay transparent unless you turn the transparent background off and pick a fill colour. You can also choose between padding (contain) and cropping (cover) for non-square images.

Is my image uploaded to a server?

No. The icon is built in your browser, so the image never leaves your device. The tool converts one image at a time.

Yes. Every tool is free to use, with no account and no credit card. The work runs on your device rather than on our servers, which is what keeps it free to run.

Are my files uploaded?

No. Your files are opened and processed inside your browser and are not sent to LibraTool. Some tools first download a processing engine or AI model to your browser; that download contains no data of yours.

Does it work on mobile?

Yes. It runs in current mobile browsers on iOS and Android, with nothing to install. Very large files can be slow or run out of memory on a phone, so use a computer for those.

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Free PNG to ICO Favicon Converter

Convert PNG, JPG, WebP, or SVG images into multi-size .ico favicon files. Pick the sizes you want bundled (16, 32, 48, 64, 128, 256) and download a single .ico.

File size depends on your deviceFiles stay privateNo login requiredFree forever

Works offline once loaded

Drop a file here, or click to browse

PNG, JPG, WebP, SVG, HEIC, HEIF · processed on your device

or press Ctrl+V to paste from your clipboard

Browse files

Tip: you can paste a screenshot with Ctrl+V

Your files never leave your device. All processing happens locally in your browser.

Common uses

Create a Website Favicon from PNGConvert your logo PNG to a multi-size favicon.ico file for your website tab icon.
Create a Windows Desktop IconConvert PNG or JPG images to .ico files for Windows desktop shortcuts and application icons.
Multi-Size Cross-Platform IconBundle multiple icon sizes (16, 32, 48, 64, 128, 256) into one .ico file that works everywhere.
PWA Icon Source FileGenerate a base .ico from your PWA logo for fallback support in older browsers that don't use the manifest.
Convert Brand Logo to ICO FormatTransform your company or brand logo from PNG, JPG, or SVG into a high-quality .ico file for digital touchpoints.

How It Works

The conversion runs entirely in your browser using two mechanisms written directly in this tool: the Canvas API to scale and render each icon frame, and a hand-written ICO binary encoder that packs those frames into a single .ico file — no library is downloaded, and no file ever leaves your device.

1
Image decoded into a canvas
Your uploaded PNG, JPEG, WebP, or SVG is loaded into an HTMLImageElement and drawn onto an off-screen canvas at each requested size (16×16 through 256×256). The canvas uses high-quality bicubic smoothing and respects your fit choice: 'contain' letterboxes the image with transparent or colored padding, while 'cover' crops a centered square from the source.
2
Each frame exported as PNG bytes
The browser's built-in canvas.toBlob('image/png') encodes each scaled frame into a lossless PNG. These raw bytes are what get embedded inside the .ico container — modern browsers and Windows handle PNG-in-ICO natively, which keeps file sizes smaller than the older BMP-based format.
3
ICO binary assembled in memory
A hand-written encoder builds the .ico file structure from scratch using DataView: a 6-byte ICONDIR header declares the image count, followed by a 16-byte directory entry for each size (recording width, height, bit-depth, byte length, and data offset), then all PNG payloads concatenated in sequence. No third-party library is involved.
4
Preview shown, file downloaded
Before offering the download, the UI renders a pixel-accurate preview of every packed size against a checkerboard background so you can verify transparency before saving. The assembled Blob is handed to the browser's download mechanism as 'favicon.ico'.

Your image is processed entirely within your browser — it is never uploaded to any server, and no copy is retained after you close the tab.

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