Converts GIF files to ICO format — simple animations, memes, and images on platforms that support animated GIFs natively to favicons and app icons. All conversion happens locally in your browser with no file size limits.
Runs on Canvas
Content reviewed October 2026 · About Toolzum
WebP to ICO output is not produced here — WebP input decodes, but Canvas cannot encode ICO, so conversion fails locally. Convert WebP to PNG/JPG/WebP instead — local, unlimited saves.
HEIC to ICO output is not produced here — HEIC input decodes via heic2any, but Canvas cannot encode ICO, so conversion fails locally. Convert HEIC to PNG/JPG/WebP instead — local, unlimited saves.
AVIF to ICO output is not produced here — AVIF input decodes, but Canvas cannot encode ICO, so conversion fails locally. Convert AVIF to PNG/JPG/WebP instead — local, unlimited saves.
Convert animated GIFs to modern WebP or WebM formats with transparency support — ~10x smaller files. Shrink GIFs dramatically for modern web use — local conversion, unlimited saves.
Design simple logos with text, tagline, and 5 preset icons on canvas — export PNG/SVG. Draft startup marks in an afternoon — local Canvas work, unlimited saves.
GIF (Graphics Interchange Format) uses lossy (limited to 256 colors) encoding and is best for simple animations, memes, and images on platforms that support animated GIFs natively. ICO (Windows Icon) uses lossless (multiple sizes) encoding and excels at favicons and app icons — standard format for website bookmarks and Windows application icons. Converting between them lets you take advantage of each format's strengths — for example, using a compressed format for sharing and a lossless format for editing. All conversion happens locally in your browser with no file size limits.
Canvas cannot encode ICO, so the run ends in Conversion failed with no file written. Convert GIF to PNG, JPG, or WebP for a working download.
Moot — no ICO is emitted from GIF input, so no size set builds. Convert GIF to PNG for icons and favicons instead.
For GIF sources: PNG for exact pixels, JPG for photos at fixed 0.92, or WebP at 0.85 — every one encodes locally with unlimited saves.
No — the attempt runs locally in your browser and fails before any save. Local-tool downloads stay unlimited.
ICO to GIF
Turn ICO icons into GIFs in your browser — each icon still encodes to a single-frame GIF locally via the bundled gif.js worker. Stills-only output flattens transparency to white, and downloads are unlimited since nothing is uploaded.
Bulk Image Format Converter
Convert image batches between JPG, PNG, WebP, and AVIF outputs (JPEG/PNG/WebP/AVIF/HEIC/HEIF/GIF/BMP/ICO/SVG inputs; HEIC via heic2any, SVG rasterized at intrinsic size or 1024px fallback) with a quality slider (10–100, default 80). Pair pages (?from/?to) preset the output. Flat ZIP renamed per file — local, 5-file guest batches, 25 signed-in, 500 Pro.
Batch Image Converter
Convert a batch of images to one output — JPG, PNG, or WebP — at quality 10–100% (default 80%), capped at 4096px longest side, then download everything as a ZIP. Files that fail conversion fall back to their originals inside the same archive — local library work.