Mirror a video horizontally, vertically or both - locally in your browser, no upload.
Running locally on your device ...
Running locally on your device ...
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Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
A webcam recording where text on a T-shirt or whiteboard appears backwards because the camera captured it "like a mirror", or a deliberate creative effect for a music video - this tool mirrors every frame of a video along the horizontal or vertical axis, or both at once (a 180-degree point reflection).
Important and honest: unlike the sibling "Rotate video" tool, there is NO metadata flag a container can set for a mirror - every frame genuinely has to be redrawn and re-encoded. That needs a hardware video encoder in your browser; without one, the tool honestly reports that instead of producing unusable or crashing output.
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: Full re-encode of every frame (no metadata trick like rotation), so it needs a hardware video encoder in your browser - without one you get an honest error instead of a risky output. Audio track stays unchanged as long as the browser can encode a matching audio codec. One file per run, ~600 MB limit (the browser tab's memory limit: without streaming support the file must fit in whole, with streaming it rises to about 1 GB).
No. The whole mirroring happens locally in your browser.
Unlike rotation, there is no metadata trick - every frame is re-rendered on a canvas. On a pure software encoder that can crash the browser tab, so hardware is required.
Rotating turns the picture in 90-degree steps (often just a metadata flag). Mirroring swaps left/right or top/bottom and always re-encodes to do it.
No, the audio track is passed through unchanged, as long as your browser can encode it.
Change video resolution · Strip video metadata · Normalize volume · Extract subtitles · Reverse video · Vertical video