Rotate or flip a video

Phones don't actually store a turned picture when you film in portrait or upside down. They record the frames in the sensor's orientation and add a small rotation flag to the file that tells players how to display it. If the phone misjudged how you were holding it, for example when filming straight down at a table, the flag is wrong and the video plays sideways.

This tool fixes that by rewriting the flag. The frames themselves are copied untouched, so it's finished in seconds and there's zero quality loss. Phones, browsers, VLC, QuickTime and most editing apps read the flag correctly. The live preview shows the result before you save.

After a 90° turn, width and height swap: a 1920×1080 landscape video becomes 1080×1920 portrait. The new dimensions and orientation (landscape, portrait or square) are shown before you start.

Tick Burn the rotation into the frames only if a particular player, old TV or editing program still shows the video sideways after a normal rotation. Burning in re-encodes every frame as H.264 with the picture physically turned, which works everywhere but takes longer (from seconds to several minutes) and recompresses the video.

Mirror always re-encodes, because flipping a picture can't be done with a flag. A typical case is a selfie video where text on a shirt or a sign reads backward. If the audio track can't be converted by your browser, the tool tells you the result is silent. A burned-in or mirrored video keeps the original resolution, with width and height swapped for 90° turns.

You can rotate MP4, MOV, M4V, WebM and MKV files. The result is saved as an MP4 named after the original with -rotated or -mirrored added, so you never overwrite your source file. Audio is kept and converted only when MP4 can't hold the original audio format.

To rotate several videos, process them one after the other; each file is handled independently and the settings stay as you left them.

On iPhone and Android you can usually avoid sideways videos by unlocking screen rotation and holding the phone in its final orientation for a second before you press record, so the motion sensor settles. Recording straight down at a desk or a document is the most common cause of a wrong rotation flag, because the phone can't tell which way is up.

Your video stays on your device: it's read and rotated in your browser and saved straight back to you. Nothing is uploaded. It works in current Chrome and Edge, Safari 16.4 or later and Firefox 130 or later on desktop.

Also useful: resize a video for Reels or TikTok, or compress it for sharing.