ICO Converter Online — Multi-Size, Free, Instant
Convert any PNG, JPG, or WebP into a Windows-compatible .ico file. Pick the sizes you need — 16, 32, 48, 64, 128, 256 — packed into one icon.
When You Need a .ico File
Windows Apps
- Set the icon for a Windows desktop application (.exe, .lnk)
- Bundle multi-size icons for a Windows installer (MSI, Inno Setup)
- Replace the default icon on Electron / Tauri apps
- Create app icons for Win32 desktop tools and shortcuts
Legacy Favicons
- Generate /favicon.ico for old browsers and bookmark systems
- Provide a fallback alongside modern PNG / SVG favicons
- Match the multi-size favicon convention used by IE / older Edge
- Add 16×16 and 32×32 variants in one file for crisp tab icons
Tools & Utilities
- Make icons for command-line tool wrappers and batch scripts
- Create custom folder icons on Windows (desktop.ini)
- Build icon sets for portable apps shipped on USB drives
- Generate icons for IDE plugins and Windows context menus
How to Convert to ICO Online — 3 Steps
Upload Your Image
Drop any PNG, JPG, WebP, or GIF into the tool. A square image works best — non-square sources are scaled to fit.
Pick the Sizes
Toggle which sizes to include — 16, 32, 48, 64, 128, 256. The full set covers Windows apps and legacy favicons. The minimum is one size.
Download the .ico File
Each size is rendered via canvas and packed into a single multi-size .ico container. Click Download to save the file.
Free Online ICO Converter — Multi-Size, Browser-Based, No Upload
An .ico file is a Windows icon container that holds one or more square images at standard sizes — 16, 32, 48, 64, 128, and 256 pixels. Windows automatically picks the closest size when displaying an icon at different scales. PicsSizer's ICO Converter renders each selected size from your source image using the HTML5 Canvas API, then packs the PNG payloads into a real .ico file format directly in your browser. No server. No upload. The output is a valid Windows-compatible icon ready for use in apps, installers, and legacy favicons.
ICO vs. Favicon Generator
If you need a complete favicon set with PNG / SVG / Apple Touch / web manifest, use the Favicon Generator instead — it produces the full bundle modern web apps expect. Use the ICO Converter when you only need a single .ico file: Windows app icons, legacy /favicon.ico fallbacks, or icons for desktop tools that accept just one icon container.
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ICO Converter — FAQ
Common questions about converting images to ICO online