Rotate Video Online
Processing entirely on your device — large files may take a moment.
Choose 90°, 180° or 270° and the video is re-encoded with the transpose filter — the picture is rotated for real, not just flagged, so every player shows it upright.
The audio track is copied untouched, so music and speech stay perfectly in sync. The output keeps your input container (MP4 stays MP4).
How to rotate video
- 1
Select your files
Drag & drop your MP4 files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to MP4". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted MP4 file individually, or grab everything at once as a ZIP archive.
About the MP4 format
MP4 (MPEG-4 Part 14) is the universal delivery container of digital video. It wraps H.264, HEVC or AV1 video with AAC audio, and its structure — separate metadata (moov) and media atoms — is what makes streaming, seeking and fast-start playback possible. Phones, cameras, TVs, browsers and every social platform assume MP4 first.
Quality is entirely a function of the codec and bitrate chosen at encode time, so an MP4 can be a 10 Mbps HEVC master or a postage stamp. That flexibility plus total playback coverage is why nothing has displaced it in twenty years — conversion between formats almost always ends in MP4.
+Strengths
- ✓Plays on every device and platform in existence
- ✓Streaming-ready structure (fast start, seeking)
- ✓Choice of modern codecs: H.264, HEVC, AV1
!Limitations
- −Quality depends entirely on encode settings
- −HEVC variants hit licensing gaps on some platforms
Frequently asked questions
Will the sideways video become vertical?
Yes. A 90° or 270° rotation swaps width and height, so a landscape recording becomes a true portrait video.
Is quality lost?
One re-encode at high quality (CRF 23). For phone footage the difference is practically invisible.
What about the orientation metadata phones write?
This tool rotates actual pixels and outputs a clean file without rotation flags, which is exactly what older editors and uploaders need.