Create a boomerang effect from a video - forward, then backward, endlessly loopable. Locally, no upload.
Running locally on your device ...
Running locally on your device ...
0%
Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
The "Boomerang" effect known from Instagram: a short clip plays forward and immediately backward again, so a motion looks like a back-and-forth and loops seamlessly back to the start. This tool builds exactly that effect from a dropped video clip - no app needed.
Important and honest: like the sibling "Reverse video" tool, the source clip must be fully decoded before the reverse pass can be built - so at most about 15 seconds of source material is supported (the output ends up roughly twice as long: forward plus back leg). The pivot frame is not shown twice on the way back, so the loop does not stutter. Just like the original Boomerang effect, audio is deliberately left out - a chopped-up back-and-forth of the soundtrack would only be distracting.
Everything runs locally in the browser with mediabunny (MPL-2.0, self-hosted, no third-party CDN) on the browser's native WebCodecs API. Your video is not uploaded.
| Input formats | MP4, M4V, MOV, MKV, WEBM |
|---|---|
| Auto-conversion | PNG, GIF |
| Output format | MP4 |
| Batch processing | No |
| Processing | Locally in your browser (WebCodecs) |
| File upload | None |
Limitations: No audio in the result (the Boomerang effect's own market convention). Because of the memory needed, only about 15 seconds of source material is supported - longer clips are honestly truncated to the opening section (visible in the filename). The result is roughly twice as long as the truncated source. One file per run, ~600 MB limit. Needs a secure context (https) and browser WebCodecs support.
No. The whole effect is built locally in your browser.
No, deliberately not - exactly like the original Boomerang effect from Instagram.
About 15 seconds - the effect doubles the length (forward and back), and the clip must be fully decoded first.
No, the pivot frame is skipped on the way back so the loop does not stutter.
Yes, the result is built to start over seamlessly.
Reverse video · Vertical video · Video to GIF · Merge videos