FlipVideo

Free. Runs in your browser.

Phone video came out sideways? Rotate or mirror it here. You see a before and after for every file, so nothing gets written until it looks right.

Fast mode just rewrites the rotation flag: instant on any file size, zero quality loss.
Re-encode mode physically turns every frame, for old players that ignore the flag.
One file or a whole folder. Everything stays on your device.

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Want to see what it does first? Read the help page.

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