About the Rotate Video
Filmed with the phone turned the wrong way? This tool turns videos 90° right, 90° left or 180°. In fast mode it marks the video with the correct orientation without re-encoding a single frame, which is instant and lossless, and phones, browsers, YouTube and most players respect it. If a player or editor ignores orientation, tick Rotate the picture itself to re-encode every frame the right way round. The video is processed on your device and never uploaded.
Updated October 2026
How to use the Rotate Video
- 1Select the sideways or upside-down video.
- 2Choose 90° right, 180° or 90° left.
- 3Tick Rotate the picture itself if your player ignores orientation.
- 4Press Rotate video.
- 5Check the preview and download it.
Why phones record sideways videos
Phones decide orientation when you press record. If you start recording while holding the phone flat or turn it afterwards, the whole video keeps the starting orientation. Rotating afterwards fixes it without filming again.
Fast or full rotation?
Choose fast for sharing, YouTube and playing on phones; choose full for editing software, old TVs and players that ignore orientation.
- Fast: instant, lossless, keeps the format
- Full: re-encodes as MP4, works in every player
- Full takes about as long as the video plays
How it works without uploading
Your browser has a built-in video engine (WebCodecs) that phones and computers use to play and record video. This tool uses it through Mediabunny, an open-source media library, to read your file, change it and write a new one, all inside the page. Speed depends on your device: a recent phone or laptop handles a few minutes of HD video comfortably, while long 4K files take longer.
Rotate or flip?
Rotating turns the picture around its centre. Flipping mirrors it, swapping left and right, like a selfie preview. If text in your video reads backwards, you need Flip Video instead.
How orientation is stored
MP4 and MOV files contain a small matrix that tells players how to turn the picture when they show it. Phones write it when they record, and it is how a phone can save a portrait video from a sensor that is physically landscape. Fast mode adds your rotation to that matrix; nothing else in the file changes, which is why the result is the same size and quality as the original.
After rotating
Upload the rotated file to YouTube, Instagram or a messaging app as usual. If you plan to edit the video in software that ignores orientation, such as some older editors, rotate it again with the full option so the frames themselves are turned.
Phone and computer
Rotate videos straight from your phone's gallery. Fast mode takes seconds even on older phones. If part of the frame is in the way, remove it with Crop Video, and use Flip Video to mirror the clip. The Video Converter changes the file type when you are done, and Rotate & Flip Image does the same job for photos.
Features
- 90° right, 90° left and 180°
- Instant, lossless orientation fix
- Full re-encode option for any player
- Keeps MP4, MOV, WebM or MKV in fast mode
- Preview before download
- No upload
Frequently asked questions
Which way should I rotate?
If the top of the picture is on the left, choose 90° right. If it is on the right, choose 90° left. If it is upside down, choose 180°.
What does fast mode actually change?
MP4 and MOV files have an orientation setting, like a photo's. Fast mode changes that setting and copies the video untouched, so quality is identical.
Why does my rotated video still look sideways in some apps?
A few older players and editors ignore the orientation setting. Use Rotate the picture itself, which turns every frame and works everywhere.
Does rotating change the resolution?
No. A 1920 × 1080 landscape video becomes a 1080 × 1920 portrait video with the same detail.
Which browsers work best?
Chrome and Edge on computers and Android support the most video formats. Safari 16.4+ and recent Firefox work too, but some codecs, such as HEVC in Firefox, may not be supported there.
Is my video uploaded?
No. It is processed on your own device with your browser's built-in video engine, so private videos never leave your phone or computer.
Can I rotate only part of a video?
No, the whole video is rotated. Trim it first if you only need part of it.