Flip Video Online
Processing entirely on your device — large files may take a moment.
Horizontal flip is the classic mirror — great for selfie footage, dance tutorials and fixing text that reads backwards. Vertical flip turns the picture upside down, handy for reflections shot through glass or water.
The flip is a real re-encode of the picture (H.264), while the audio track is copied untouched — lip sync stays exact.
How to flip 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
Horizontal or vertical — which do I need?
Horizontal (the default) mirrors left-right like a bathroom mirror. Vertical flips top-bottom, like a reflection in water.
Will text in the video be readable?
After a horizontal flip, mirrored text reads correctly only if you flipped it because the source was mirrored. Flipping normal footage makes its text backwards.
Does flipping change duration or size?
No. Duration, resolution and frame rate are preserved; only the picture orientation changes.