Rotate a video that is sideways or upside down
Turn a video by 90, 180 or 270 degrees in a couple of clicks. For MP4 and MOV files the rotation is saved without re-encoding, so it is instant and loses no quality.
How it works
- 1
Choose or drop the video that plays the wrong way round (MP4, MOV, WebM or MKV).
- 2
Pick the rotation: 90° clockwise, 180° or 270° (90° counter-clockwise).
- 3
Click Rotate Video and download the corrected file. Nothing is uploaded.
Why phone videos end up sideways
Phones record with the camera sensor in a fixed position and write a small "rotation" flag into the file to say how the phone was held. Most players read that flag, but not all of them do, and the orientation sensor sometimes guesses wrong: when you start filming while the phone lies flat on a table, or turn it just after pressing record, the whole clip is saved sideways or upside down.
The result is familiar: a portrait video that shows up lying on its side in a video editor, on a TV, in a presentation, or after it has been sent through a messaging app. Rotate Video fixes the orientation once, in the file itself, so it plays the right way round everywhere.
Instant and lossless for MP4 and MOV
For MP4 and MOV files (including iPhone videos), Vidmini does not touch the picture at all. It copies the video and audio streams as they are and only rewrites the rotation information in the file. That takes a second or two even for a long video, and the quality is exactly the same as the original: the page shows "Lossless: no re-encoding" when this is the case.
WebM and MKV files do not have an equivalent rotation flag that players reliably respect, so for those formats Vidmini turns the actual pixels and re-encodes the video. It still happens on your device with the browser's hardware encoder when available, it just takes longer and involves a small generation loss, like any re-encode.
Which rotation do I need?
If the top of the picture is on the left, rotate 90° clockwise. If it is on the right, choose 270°, which is the same as 90° counter-clockwise. If everything is upside down, use 180°. If you are unsure, try one: on MP4 and MOV the result is ready in seconds, so a second attempt costs nothing.
If the video looks mirrored rather than rotated, for example text reads backwards in a selfie clip, rotation will not fix it: use Flip Video instead, which mirrors the picture horizontally. You can also chain tools: rotate first, then crop to 9:16 or 1:1, or compress the result, without selecting the file again.
Private, free and without a watermark
The whole process runs in your browser using WebCodecs and WebAssembly. Your video is never uploaded, there is no account to create and no watermark is added. Once the page has loaded, it keeps working even if you go offline.
There is no file size limit set by us. The output is written to your browser's private storage, so desktop browsers handle files of several gigabytes; on phones the limit depends on free memory and storage.
Frequently asked questions
How do I rotate a video 90 degrees?
Open the video, choose 90° (clockwise) or 270° (counter-clockwise) and click Rotate Video. For MP4 and MOV files the new orientation is saved in a second or two without re-encoding.
Does rotating a video reduce its quality?
Not for MP4 and MOV: the video stream is copied untouched and only the rotation metadata changes, so the quality is identical. WebM and MKV files are re-encoded, which can cause a small, usually invisible loss.
Can I rotate an iPhone video?
Yes. iPhone videos are MOV (or MP4) files, often in HEVC. Since a pure rotation only changes metadata, even HEVC videos are rotated instantly and keep their original codec and quality.
Why does my rotated video still look sideways in one app?
Some older players and editors ignore the rotation flag in MP4 and MOV files. Modern browsers, phones, VLC and current editors all respect it. If a specific app still shows the video sideways, check whether it has its own orientation setting, or try opening the file in a more recent player.
Can I mirror or flip a video here too?
The same tool offers "Mirror horizontally", which is what the Flip Video page uses. Mirroring always re-encodes the video, because the pixels themselves have to change.
Is my video uploaded anywhere?
No. The file is read and processed by your own browser. The page's Content Security Policy only lets it talk to vidmini.com for its own code, and no tracking cookies are used.