Rotate & Flip Video
Turn a sideways or upside-down clip the right way up, or mirror it horizontally or vertically. A plain rotation never touches a pixel — it finishes in seconds, however long the clip is — and the preview shows the exact orientation before you commit to an export.
Why a rotation is instant but a flip is not
Video containers have carried rotation as a piece of metadata for years — it is the same mechanism a phone uses to store footage shot sideways while still displaying it upright everywhere else. MP4 writes it as a display matrix in the file's header, and every player, browser and editor already reads it. Turning your clip 90° here means writing that flag and copying the encoded picture straight through, untouched.
A mirror flip has no equivalent. No video format has a "flipped" flag players are expected to honour, so the only way to produce one is to actually redraw every frame mirrored and encode the result again. That is real work — a full decode and re-encode, the same cost as the crop and resize tools pay for reframing a picture — so it takes proportionally longer for a longer clip, and rotating and flipping together pays that cost once rather than twice.
Frequently asked questions
How do I rotate a sideways or upside-down video?
Drop the file in, click Rotate left or Rotate right until the preview looks upright, and export. A plain rotation — no flip — copies the picture packet for packet and writes the turn as the file's own rotation metadata, so it finishes in seconds regardless of how long the clip is.
Why does flipping take longer than rotating?
Rotation has a real metadata mechanism that MP4 has supported for years — the same trick a phone uses to store footage right-side up regardless of how it was held. A mirror flip has no equivalent in any video format: there is nothing to flag, so every frame has to be decoded, mirrored and re-encoded on your device's own video encoder. A rotation combined with a flip re-encodes too, since the flip is doing the heavy lifting either way.
Will my video change size or crop anything?
No. A rotation only turns the frame — 1920×1080 rotated 90° exports 1080×1920, with nothing cropped, padded or resampled. If you also need to reframe for a specific platform, use the crop or resize tools after rotating; this tool only ever changes orientation.
Does this upload my video anywhere?
No. Every path here — the instant metadata copy and the WebCodecs re-encode a flip needs — runs entirely inside this browser tab. The file is read from disk and never leaves your device; there is no server, no queue and no account, and nothing is watermarked.
Which formats and browsers work here?
MP4, MOV, MKV and WebM go in, up to 2 GB. Output is always MP4. AVI, WMV, FLV and MPG cannot be read by the browser's built-in video engine at all — convert one to MP4 first and bring that back. Any current version of Chrome, Edge, Safari or Firefox has what a plain rotation needs; a flip additionally needs a browser with a WebCodecs video encoder, which the same four already have.