Play any video backwards — video, audio, or both independently. Create rewind effects for social clips — local FFmpeg work, unlimited saves.
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.
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.
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.
Convert Opus voice files to M4A for Apple Podcasts and iTunes compatibility. Publish voice content where Opus won't play — local FFmpeg work, unlimited saves.
Create ZIP archives from your files right in your browser. Bundle loose files into one archive.zip with DEFLATE compression — local JSZip work, unlimited saves.
Independently selectable (default both): reversed video with normal audio suits magic tricks; both reversed sells full rewind effects. A Preserve Audio Pitch switch (on by default) runs areverse through asetrate/aresample 44100; turn it off for raw reversed audio.
No — frame order changes, pixels don't. Re-encode settings decide output quality, not direction.
Roughly real-time on laptops — FFmpeg buffers the whole file first. A 5-minute clip reverses in a few minutes; keep the tab open.
No — reversing runs locally in your browser with FFmpeg. Saves never touch a meter — downloads on local tools are unlimited.
Video Speed Changer
Speed up or slow down video from 0.1x to 10x (presets 0.25x–4x) with pitch-corrected audio via chained atempo filters. Make a 20-minute lecture watchable at 2x — local FFmpeg work, unlimited saves.
Video Filters
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.