Turn one image (PNG, JPG, WebP, or GIF) into a hand-built 32-bit Windows ICO — 6 sizes (16, 32, 48, 64, 128, 256) packed by default, or a single size (default 32). Center square-crop on, or fit with transparent/color background; alpha under 128 becomes transparent. Saves as <name>.ico. Photos never leave your device — processing runs locally in your browser with Canvas and WebAssembly.
Runs on Canvas
Content reviewed October 2026 · About Toolzum
Upgrade one GIF to APNG via FFmpeg apng codec at locked 10fps and source dimensions (Lanczos) — 24-bit color plus 8-bit alpha, no size/quality settings. Result panel shows GIF vs APNG KB with ±% change; saves as <name>.png. Modernize sticker packs — local FFmpeg work, unlimited saves.
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.
Combine 2–9 photos into a fixed 1200×1200 collage across 5 fixed-count layouts — Grid 2×2 (exactly 4), Grid 3×3 (exactly 9), Horizontal/Vertical strips (2–9), Featured (exactly 3). Cells center-crop; spacing 0–20px, border 0–10px, radius 0–50px, PNG/JPG/WebP output (quality 0.92 default).
Bind hundreds of JPG, PNG, or WebP images into one multi-page PDF with page size, orientation, and fit control. Agents compile 80 property photos into a brochure — local jsPDF work, 2 free batches a day.
Burn text watermarks into a video with 5 position presets (bottom-right default, fixed 24px white on semi-transparent black box). Brand one clip at a time — local FFmpeg work, unlimited saves.
16, 32, 48, 64, 128, and 256px — all six packed into one ICO by default (256 stored as 0 per spec), or a single size with multi off. Tabs use 16–48; app icons use the top end.
Square PNGs with clear subjects — center-crop is on by default. Transparency survives: pixels under 128 alpha land in the ICO AND mask; non-crop fit offers a transparent or solid background.
Link with rel="icon" in HTML head; browsers pick it up automatically.
No — the ICO is hand-assembled locally in your browser (32-bit BMP entries + mask); unlimited saves on local tools.