Rotate Video

How Rotate Video works

Rotating re-draws every frame at the new orientation and re-encodes it with H.264 at high quality, so the video plays the right way round in every player, website and app, not only in the ones that honour a rotation flag. The sound is copied across unchanged.

Phones record orientation as a flag that some players ignore, which is why a clip can look fine on the phone and sideways on a computer or in a presentation. Baking the rotation into the frames fixes that for good.

Re-encoding runs on your own device with ffmpeg compiled to WebAssembly, so it takes a while for long HD videos: roughly several times the length of the video on a laptop. Short clips are quick.

The rotated file is named after the original with -rotated added and keeps its container, so a MOV stays a MOV and an MP4 stays an MP4. A turn of 90 degrees swaps the width and height, so a sideways 1920 by 1080 clip becomes an upright 1080 by 1920 one, which is the shape phones and vertical video platforms expect. The picture is re-encoded in the widely supported H.264 format with a standard colour layout, so the result plays in browsers, on TVs and in presentation software.

Rotate Video options explained

When to use it

Rotate a video when a phone recorded it sideways, when it plays rotated in PowerPoint, Windows or on a website, or when an upside-down action camera clip needs flipping before editing.

Rotating re-encodes the whole video, so trim it first if you only need part of it; the rotation then has less to process and finishes sooner.

About these video tools

The video tools use ffmpeg, the program behind most video software, compiled to WebAssembly so it runs in your browser. The engine is downloaded once, about 32 MB, and cached, so later visits start straight away. Some operations only copy streams, which is fast and lossless; others must re-encode every frame, which is slower because it runs on your own processor rather than a server farm. Each tool says which it does. Keep the tab in front while it works, because browsers slow down background tabs. For very long 4K recordings, a desktop editor will be quicker, but for the everyday clips people trim, mute and rotate, the browser is enough and the video stays private.

Rotate Video troubleshooting

It is taking a long time

Rotating re-encodes every frame on your own processor. Keep the tab open and in front; background tabs are slowed down by the browser.

The result is still sideways

Choose the other direction: a clip lying on its right side needs 90 degrees anticlockwise, not clockwise.

A phone runs out of memory

Long 4K clips can be too large for a phone browser. Trim the clip first, or rotate on a computer.

How to use Rotate Video, step by step

1. Press "Choose a video" or drag files onto the box.
2. Set the options if you need to; the defaults suit most uses.
3. Press "Rotate video". The work happens on your device.
4. Save the result with its download button.

Is it safe to do this online?

With most online tools, "online" means your file is uploaded to a company's server, processed there and kept for a while before it is deleted. Here it is not. The page downloads the tool's code to your browser, and your file is read and processed inside the tab on your own device. It is never sent to TapToConvert or anyone else.

You can check this yourself: once the page and its engine have loaded, turn off Wi-Fi and the tool still works. That also means there is no queue, no daily limit and no file size cap set by a server; the only limit is the memory your browser gives a single tab.