Converts ICO files to HEIC format — favicons and app icons to Apple device photos. All conversion happens locally in your browser with no file size limits.
Runs on Canvas
Content reviewed October 2026 · About Toolzum
BMP to HEIC output is not produced here — BMP input loads, but Canvas has no HEIC encoder, so conversion fails locally. Convert BMP to PNG/JPG/WebP instead — local, unlimited saves.
PNG to ICO output is not produced here — browsers have no ICO encoder, so Canvas conversion fails locally instead of downloading. Convert PNG to PNG/JPG/WebP instead — local, unlimited saves.
JPG to ICO output is not produced here — browsers have no ICO encoder, so Canvas conversion fails locally instead of downloading. Convert JPG to PNG/JPG/WebP instead — local, 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.
Generate favicon packages — PNG icons plus Apple touch icons — from one image. Note: the .ico file is PNG data renamed (modern browsers only). Ship every platform icon in one pass — local generation, unlimited saves.
ICO (Windows Icon) uses lossless (multiple sizes) encoding and is best for favicons and app icons — standard format for website bookmarks and Windows application icons. HEIC (High Efficiency Image Container) uses lossy or lossless encoding and excels at Apple device photos — iPhone and Mac default format with excellent compression efficiency. 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 has no HEIC encoder, so the run ends in Conversion failed with no file written. Convert ICO to PNG, JPG, or WebP for a working download.
Moot — no HEIC is emitted from ICO input. Convert ICO to JPG for Apple Photos instead.
For ICO 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.
HEIC to ICO
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.
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.