Reverse video

How it works

1. 1

   Add your video

   Drop in the clip you want to run backward.

2. 2

   Choose the sound

   Reverse the audio along with the picture, or make the result silent.

3. 3

   Download

   Save the backwards MP4.

Why reversing a video is heavier work than it looks

Reversing a list of frames sounds trivial, and it would be, if a video were a list of frames. It is not. Most frames in a compressed video do not contain a picture at all, they contain the differences from the frame before them, which means frame 400 cannot be understood without having decoded frames 300 through 399 first.

So a reverse cannot be performed by reading the file backwards. The video has to be decoded forwards, in order, holding the resulting pictures, and only then can they be emitted in the opposite order and compressed again. That is why reversing costs real time and memory where trimming is nearly free, and why a long clip is a much bigger job than a short one.

The audio is reversed along with the picture, which is worth expecting rather than discovering. Reversed speech is unintelligible and reversed music is disorienting, so most reversed clips end up muted or given a new soundtrack, and that is a choice worth making deliberately rather than by accident.

Reverse a video with no upload and no watermark

The decode, the reversal, and the re-encode all happen on your own machine. No upload, no length limit beyond what your device can hold, and no watermark on the file that comes out.

Reversing is one of the operations where a free online tool most reliably asks for a subscription, because it is genuinely expensive to run on someone else's servers. Running it on your own hardware is what makes it free without a catch.

For a clip that plays forwards and then backwards as a seamless loop, the boomerang maker builds that in one step rather than making you reverse, then merge. To drop the reversed audio entirely, the muter will remove the track.

Why nothing uploads

Other tools send your video to their servers, which costs them money per file, so they add watermarks, cap file sizes, and make you sign up. This tool does the work right here in your browser using your own device. Your file is never uploaded, so there is no wait, no watermark, no size limit, and no account.

Questions

How do I make a video play backwards?

Add the file and press "Reverse video". The whole clip is rendered back-to-front, last frame first.

What happens to the audio?

Your choice: reverse it along with the picture, or drop it for a silent clip, reversed speech usually sounds strange.

Why does it warn about long videos?

Reversing needs the whole clip in memory at once. Clips over a minute or two can exceed a phone's RAM; trimming first avoids that.

Does my video get uploaded?

No. Reversing happens in your browser; your file never leaves your device.

Is there a watermark?

No. Reversing is the operation free tools paywall most often, because it is genuinely expensive to run on a server. It runs on your own hardware here, so there is no watermark, no signup, and no length cap.

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