Rotate Video
Rotate videos 90, 180, or 270 degrees and flip horizontally or vertically. Changes are hard-coded into pixel data in your browser without uploading files.
MP4, WebM, MOV, MKV, AVI, FLV, 3GP · up to 1 GB
Tips
- A one-time engine download of roughly 30 MB runs on first use and works offline afterward.
- Rotating 90 or 270 degrees swaps the horizontal and vertical resolution dimensions.
- This tool bakes the orientation directly into pixel streams rather than relying on metadata tags.
How to use it
- 1 Select or drag your video file into the tool.
- 2 Choose the rotation angle or mirror orientation you need.
- 3 Start the process and save the reoriented video when rendering finishes.
What you should know
Smartphones and cameras frequently record orientation as an EXIF or MP4 display matrix metadata tag rather than physically altering the pixel grid. While native mobile players read these tags properly, embedded web players, editing software, and legacy systems often ignore metadata flags, rendering vertical recordings sideways. Fixing this requires physically transposing the underlying raw pixel stream. Rotating a video by 90 or 270 degrees swaps its width and height—turning a standard 1920x1080 landscape file into a 1080x1920 portrait canvas—which necessitates a complete re-encoding pass to ensure universal playback compatibility across every screen and media framework.
This tool executes hard transformations directly inside your browser tab using WebAssembly. You can rotate footage clockwise by 90, 180, or 270 degrees, or flip frames horizontally and vertically to correct inverted mirror feeds. Because the engine processes each frame and re-encodes the video stream to permanently bake the selected angle into the video, original display matrix metadata tags are stripped and replaced with standard upright raster dimensions. Audio streams are preserved during the process. Because execution runs single-threaded on client-side resources, longer high-definition videos require processing time proportional to your processor speed.
Frequently asked questions
Why does rotating a video take longer than rotating an image?
Video rotation requires decoding every single video frame, transposing the pixel matrix, and re-encoding the result into a compressed video container. Because the in-browser engine runs single-threaded, processing high-resolution footage takes time proportional to clip duration.
Will rotating the video reduce its visual quality?
Transposing pixel grids requires re-encoding the video track, which applies standard compression. The tool uses balanced encoder parameters to retain clarity and preserve original audio without noticeable compression artifacts.
Are my video files uploaded to an external server?
No, all decoding, rotation, and re-encoding occur locally inside your web browser via WebAssembly. Your media never leaves your device.
Guides
Articles and format references related to this tool.
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