Reverse a video
Make a clip play backwards, for a rewind effect, a boomerang or a laugh. Done on this device, never uploaded.
- Nothing is uploaded
- Works offline after first visit
- Open source
- No watermark. On a phone, up to about 2 minutes of 1080p video (30 seconds of 4K)
Plays a video backwards, with the sound reversed or removed, from MP4, MOV, WebM or MKV to MP4. It is free, needs no account and adds no watermark, and your files are not uploaded: everything runs in your browser on your device. The size limit is your device’s memory, and phones hold less; give the page a short while after one visit to save itself for offline use, and then it works offline.
Done
Open the network tab. Your files never appear in it.
Add files and run the tool to see every request this tab makes.
Your files are processed on this device and never sent to a server. Reload the page to clear everything from memory.
How it works
- Drop one or more videos (MP4, MOV, WebM or MKV), or tap to pick them.
- Keep the sound to hear it backwards too, or tick Remove the sound.
- Reverse. Each video is decoded from the end to the start and saved as an MP4.
In your browser, not on a server
Mediabunny (MPL-2.0) reads the MP4, MOV, WebM or MKV container in your tab. Because video can only be decoded forwards, your browser (WebCodecs) decodes it in short windows from the end to the start; each window’s frames are held in memory, encoded last first, and freed. The sound is decoded by your browser and reversed. Both go into an MP4, H.264 and AAC where available.
Compared with upload-based tools: Online reversers upload the clip to a server, limit free videos to a short length, and often add a watermark. Here the video never leaves your device.
Verify it yourself. Give the page a short while after one visit to save itself for offline use, then turn off Wi-Fi or switch to airplane mode and run the tool again. Or open your browser's developer tools (F12, or Cmd-Option-I on a Mac), pick the Network tab, and watch it while you convert. The panel above does the same count for you.
Questions
Is my video uploaded?
No. Your browser decodes the video, puts its frames in the opposite order and encodes it again in this tab. There is no upload and no watermark.
Why does reversing take longer than other video tools?
Videos are stored so they can only be decoded forwards. To play one backwards, the page decodes it in short pieces starting from the end, which means some frames are decoded twice. It still runs as fast as your device can decode and encode.
Does it work on long videos?
Yes. Only a second or so of frames is held in memory at a time, so a long video takes longer but does not run out of memory. For a quick boomerang, trim the clip first with Trim video.
More video and audio tools
Video to JPG
Turn a video into still images: a few good frames or every single one. Done on this device, never uploaded.
Trim audio
Cut a song, a voice memo or a podcast down to the part you want, with fades if you like. Done on this device, never uploaded.
Audio converter
Turn any sound file into MP3, WAV, FLAC, M4A or OGG. Your files are converted on this device and never uploaded.
Screen recorder
Capture your screen, one window or a tab, with its sound and your voice. The video is made in this tab and never uploaded.
Popular conversions
Guides
- How to reverse a videoRewind effects are popular, but most phones have no reverse button. Here is where it exists, and a way to do it without installing an app.