Batch PNG to ICO
Convert PNG to Windows ICO favicon icons
Drop PNG files or folder here
Click to browse — supports .png
Tips
PNG — Lossless with transparency. Ideal for icon sources.
ICO — Windows icon format. Multi-size favicons in one file.
Privacy — No server sees your images. The conversion runs entirely in your browser.
Batch — Drop multiple PNGs or a folder. Each source becomes its own ICO file.
How to Convert PNG to ICO
Drop your PNG files
Drag images from your computer, or click to browse. We accept .png files.
Convert instantly
The tool converts each PNG locally in your browser using the Canvas API. Your files are not uploaded.
Download ICO
Download ICO — multi-size icon files ready for Windows and favicon use.
About PNG to ICO
A favicon or application icon has to look sharp at 16×16 pixels in a browser tab and crisp at 256×256 on a high-DPI desktop. PNG alone cannot do that — it is a single-resolution image with no concept of icon sizes. ICO is the container format that packs multiple bitmap sizes into one file, letting the operating system or browser pick the best size automatically.
This tool converts PNG files to ICO directly in your browser. PNG is a good source for icons because it supports transparency, letting the icon blend into any background. The conversion runs locally using the Canvas API; your images are not uploaded.
The tool generates common icon sizes (16×16 to 256×256) based on your source image. Sizes larger than the source are skipped to avoid blurry upscaling. The result is a single ICO file ready to use as a favicon or Windows application icon. We do not add watermarks or impose usage limits.
Frequently Asked Questions
Why convert PNG to ICO?
ICO is the standard Windows icon format. It is used for application icons, folder icons, and website favicons. Converting your PNG images to ICO creates multi-size icon files that work across all Windows versions and browsers.
What is ICO format?
ICO is the standard Windows icon format. It is a container that holds multiple image sizes in one file. Windows uses it for application and folder icons, while websites use it as the favicon displayed in browser tabs.
What icon sizes are generated?
The tool generates common standard sizes (16×16, 24×24, 32×32, 48×48, 64×64, 128×128, and 256×256) based on your source image. Sizes larger than the source image are automatically skipped to avoid upscaling artifacts. You can also manually select which sizes to include before converting.
Is there a file size limit?
There is no hard limit. Since processing runs locally in your browser, the practical limit depends on your device's memory. Most PNG images convert instantly.
Do I need to sign up or pay?
No. No account is required and no watermark is added. The tool is free to use, with no limits.
Is my photo data safe?
Yes. Everything is processed in your browser with the Canvas API. We do not upload, store, or log your images.
More blog posts to read
The Birth of PNG: How a Patent War Created the Web's Favorite Lossless Format
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ICO Format Decoded: Structure, Headers, and Why It Survived
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