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.
Runs on FFmpeg
Content reviewed October 2026 · About Toolzum
Resize one animated GIF to exact dimensions via FFmpeg Lanczos (default), Bilinear, or Nearest — width presets 100/150/200/320/480/640px or custom, height auto-follows with aspect lock ON (unlock to stretch). W/H prefill from the source; saves as <name>-resized.gif with animation intact.
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.
Crop photos with 6 aspect presets — Free Size, Square 1:1, Video 16:9, Photo 4:3, Classic 3:2, Portrait 2:3 — plus ±90° rotation and horizontal/vertical flip. Exports PNG as cropped-<name> — local Cropper.js work, unlimited saves.
Grade videos with 18 filters across Color, Artistic, Blur, and Lighting (grayscale, sepia, pixelate, gaussian blur, vignette, brightness/contrast/saturation) plus a live still-frame preview. Export MP4, WebM, or GIF — local FFmpeg work, unlimited saves.
Convert MP3 to AAC for better quality per bit on Apple devices and streaming. Modernize libraries for smaller sizes — local FFmpeg work, unlimited saves.
24-bit color (no 256-color banding) plus 8-bit alpha transparency at the same source dimensions. Files often grow rather than shrink — the panel prints the exact ±% so you decide per sticker.
All modern browsers, iMessage, and most 2020+ apps; legacy GIF-only systems still need GIF. Ship APNG primary with GIF fallback.
No — output fps locks to 10 regardless of source rate, so higher-rate GIFs retime. Preview motion smoothness before converting motion-critical clips.
No — conversion runs locally in your browser with FFmpeg. Saves never touch a meter — downloads on local tools are unlimited.