Converts MOV files to WebM format — Apple ecosystem to web-optimized video. All conversion happens locally in your browser with no file size limits.
Runs on FFmpeg
Content reviewed October 2026 · About Toolzum
Convert WebM videos to Apple-friendly MOV for Final Cut and QuickTime workflows. Bring web clips into Mac editing — 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.
Strip, replace, or adjust volume (0–200%) of any video’s audio in your browser — clean B-roll, GIF sources, confidential calls. Mute copies video untouched with zero re-encode waste — local FFmpeg, 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.
Shrink MP3 files by lowering bitrate with quality presets — fit podcasts into feed limits. Cut a 50 MB episode to 15 MB cleanly — local FFmpeg work, unlimited saves.
MOV (QuickTime Movie) uses lossless or lossy encoding and is best for Apple ecosystem — Final Cut Pro, iMovie, and macOS video editing workflows. WebM (WebM Video) uses lossy compressed encoding and excels at web-optimized video — streaming, embedded players, and HTML5 video tags with fast loading. 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.
WebM with VP9 preserves transparency where the source has it — lower-thirds and overlays survive. Odd dimensions get padded to even numbers automatically.
Roughly real-time to 2x on a laptop: a 10-minute MOV converts in 10–20 minutes. Keep the tab open; closing it cancels the FFmpeg worker.
No — conversion runs locally in your browser with FFmpeg. Only the final save touches the network — downloads are unlimited.
Video to MP3 Converter
Extracts the audio track from uploaded video files (MP4, MOV, AVI, WebM) and encodes it as a high-quality MP3 file. Free to start with no signup.
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 Compressor
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.
Video to GIF
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.
Subtitle Translator
Translate pasted SRT or VTT subtitle text into 9 languages (Spanish, French, German, Japanese, Chinese, Hindi, Portuguese, Russian, Arabic) while preserving every timestamp — AI-powered with your own API key, text never stored.
Video Watermark Adder
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.