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Sideways phone clips and mirrored selfie videos are easy to fix. Turn or flip the preview until it looks right, then save a new MP4 with the picture itself rotated, so it plays the right way up in every player and app.
Processing locally on your device
Overview
Phones decide orientation from their motion sensor when you press record. If the phone was lying flat, or you rotated it after starting, the video can come out sideways or upside down. Front cameras add a second problem: many save footage mirrored, so text on signs and T-shirts reads backwards. The rotator handles both. Rotate turns the picture in 90° steps to the left or right, or 180° in one click, and Flip mirrors it horizontally (left and right) or vertically (top and bottom). Reset returns to the original.
Every change shows immediately in an animated preview that you can play, along with a plain description of the result, such as “Rotated 90° right, mirrored”, and the output dimensions. A quarter turn swaps width and height, so a 1920×1080 landscape clip becomes 1080×1920 portrait. Rotation is applied before mirroring, so after a 90° turn the Horizontal flip mirrors the picture as you now see it on screen, exactly as the preview shows.
Some apps “rotate” a video by writing a flag into the file that asks the player to turn it. That is quick, but plenty of players, editors and websites ignore the flag and show the clip sideways anyway. This tool rotates the actual pixels with FFmpeg’s transpose and flip filters and encodes a new H.264 MP4 at CRF 20, a high-quality setting. The result plays upright everywhere, and because nothing depends on metadata, it stays upright when you edit or upload it. Audio from MP4 and MOV files is copied unchanged; audio from WebM and MKV is converted to AAC.
The processing is done by FFmpeg 5.1 compiled to WebAssembly, downloaded once (about 31 MB) and cached by your browser. Because every frame is re-encoded, the time depends on the length and resolution of the clip: a 30-second phone video takes moments, while a ten-minute 4K recording can take several minutes.
| Problem | Control | Size change |
|---|---|---|
| Video lies on its side (top on the left) | Right 90° | Width and height swap |
| Video lies on its side (top on the right) | Left 90° | Width and height swap |
| Video is upside down | 180° | None |
| Text reads backwards | Horizontal flip | None |
Drop a video into the rotator.
Click Left 90°, Right 90° or 180° until the preview is upright.
Use Horizontal or Vertical flip if the picture is mirrored.
Check the description and output size under the preview.
Click Save rotated video and download the MP4.
Use cases
Overhead shots of food, documents or a desk often record in the wrong orientation. A single 90° turn puts them right before you send them.
Mirror a front-camera recording horizontally so names, logos and slides read correctly in the final video.
Dashcams, action cameras and security cameras mounted inverted need a 180° turn. One click fixes the whole recording.
Rotate a clip by 90° when a scene was shot with the camera on its side on purpose, for example to fill a vertical screen or display.
Pro tips
Answers to common questions about the rotate video.
The video is re-encoded so the pixels can be turned, but at CRF 20, a high-quality H.264 setting. For normal viewing the result is indistinguishable from the original.
A flag only works if the player honours it, and many editors, older TVs and websites don't. Rotating the pixels produces a file that is upright in every player.
A 180° rotation turns the picture upside down without mirroring it. A vertical flip turns it upside down and mirrors it, so text would also read backwards.
A 180° turn or any flip keeps the same dimensions. A 90° turn swaps them, so a 1080×1920 portrait clip becomes 1920×1080 landscape. The output size is shown before you save.
H.264 MP4 plays on virtually every phone, computer, TV and website, which is the point of fixing orientation. MOV and MKV sources are saved as MP4 too.
No. ToolEnhancer processes files on your own device inside the browser. They are never sent to, stored on or seen by our servers.
Yes. The rotate video is free to use with no sign-up, no watermarks and no daily limits.