Convert MP4/WebM to GIF animations. Videos up to 250MB. Videos never leave your device — compression and conversion run locally in your browser with FFmpeg WASM.
Runs on FFmpeg
Content reviewed October 2026 · About Toolzum
Reduces MP4, MOV, and WebM video file sizes with a configurable CRF 20–40 slider (default 28, libx264 fast preset), plus a GIF mode with color-palette control. Videos never leave your device — compression runs locally in your browser with FFmpeg WASM.
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 MP4 to WebM for fast web embedding with smaller files. Make homepage videos load instantly — local FFmpeg work, unlimited saves.
Convert GIF animations to MP4 videos for drastically smaller file sizes. Content creators use this to shrink animated GIFs by up to 90% for social media, Discord, and web pages — all in your browser, nothing uploaded.
Extracts the audio track from MP4 video files and saves it as a standalone MP3 file. All processing runs locally in your browser with FFmpeg WASM — nothing is uploaded.
MP4, WebM, MOV, AVI, and MKV files are supported. The tool uses FFmpeg WASM end to end — frame extraction and GIF encoding both run locally.
Yes. Choose 5, 10, or 15 FPS and a width of 320, 480, or 640px (height scales automatically with lanczos + palettegen/paletteuse). Lower frame rates and smaller widths produce much smaller GIF files.
There is no built-in trimmer — trim the clip first with the Video Trimmer, then convert the short segment here. Short segments also keep memory use down for GIF encoding.
Videos up to 250 MB are supported, matching the 250 MB platform cap for video files. Larger files may cause memory issues in the browser. For long videos, trimming to a short segment first is recommended.
No. All conversion happens locally in your browser using FFmpeg WASM. Your video never leaves your device.
Video Trimmer
Cut start/end segments from any video with fast stream-copy trimming in your browser (keyframe-aligned, no re-encode). Remove a 45-second cold open from a 10-minute upload — local FFmpeg work, unlimited saves.
Crop Video
Crop the visual area of your MP4 or WebM video directly in the browser with 9:16, 1:1, 16:9 presets or custom dimensions with X/Y offsets. Free to start with no signup.
Video Format Converter
Convert between MKV, MP4, MOV, WebM, and AVI video formats. Pick any input and output format from the dropdown — your files never leave your device.