Rotate Video

A video shot with the phone held the wrong way plays sideways or upside-down everywhere except the app that recorded it. This tool turns it the right way up — 90, 180 or 270 degrees — in your browser, with nothing uploaded.

It rotates by playing the video onto a rotated canvas and re-recording the result with the browser's `MediaRecorder`. That means the pixels are genuinely turned, so every player shows it upright — unlike a metadata-only rotation, which some players and upload processors quietly ignore. The audio is kept.

The cost of doing it this way is that it runs in real time (about the length of the clip) and re-encodes once. For a quick fix on a short phone clip that's fine; for a long recording, a desktop tool that rewrites just the rotation flag is faster, at the price of that flag sometimes being ignored downstream.