Convert GIF to ICO Online - Free, Local & Instant
Convert GIF (image/gif) to Multi-Size Favicon ICO (16x16, 32x32, 48x48, 64x64) (.ico) locally in your browser using HTML5 Canvas. Adjust compression quality, resize in pixels, and download instantly with zero server uploads.
Technical Comparison: GIF vs ICO
Images & Game/Web Assets| Specification | GIF (Source) | ICO (Target) |
|---|---|---|
| Format Name | Graphics Interchange Format | Multi-Size Favicon ICO (16x16, 32x32, 48x48, 64x64) |
| MIME Type | image/gif | image/x-icon |
| Transparency / Alpha | 1-bit index transparency | Preserved for PNG, WEBP, AVIF, ICO, SVG, BMP |
| Compression Profile | LZW 256-color palette | multi-resolution favicon.ico bundle for browsers, Windows apps, and game clients |
| Processing Engine | Native Browser Image Decoder | HTML5 Canvas + Client-Side Binary Encoder |
GIF to ICO — Before & After Example
Input File: asset.gif MIME Type: image/gif Alpha: 1-bit index transparency Compression: LZW 256-color palette Decoding: Browser HTML5 Image + Canvas 2D Context
Output File: favicon.ico (Binary Multi-Resolution Container) Embedded PNG Frames: 16x16, 32x32, 48x48, 64x64 (32-bit RGBA) Header: 6-byte ICONDIR + 4x16-byte ICONDIRENTRY directory Usage: <link rel="icon" href="/favicon.ico" sizes="any" />
Frequently Asked Questions: GIF to ICO
Does converting GIF to ICO upload my images to a remote server? ▾
Never. Every GIF file you select is decoded directly in your browser using the HTML5 Canvas API and FileReader API. Your images stay in your computer or phone RAM at all times.
Can I resize and adjust compression quality when converting GIF to ICO? ▾
Yes. Use the Quality slider (10%–100%) and the Width/Height pixel inputs above the drop zone. Keeping "Lock Ratio" checked preserves your original aspect ratio automatically.
Does this converter support batch GIF to ICO conversion with ZIP download? ▾
Yes. Drag and drop multiple GIF files at once; you can download each converted ICO individually or click "Download All (.ZIP)" to bundle them locally via JSZip.
Why use ICO instead of GIF? ▾
Converting GIF to ICO gives you multi-resolution favicon.ico bundle for browsers, Windows apps, and game clients while keeping full control over pixel dimensions and byte size.