Rotate or flip a video
Fix a sideways phone recording, or mirror a clip. Nothing uploads.
drop a video here
or click to choose
About rotation
Some videos — especially phone recordings — play sideways because the rotation flag in the metadata is wrong. This tool actually rewrites the video pixels rotated, so it'll play correctly in every player, not just the ones that respect rotation tags.
FAQ
Does the file get uploaded anywhere?
No. Open this page, turn off your wifi, then try a file — it still works. That's the test.
What's the maximum file size?
Browser memory is the limit. WebAssembly caps at 2–4 GB per file. Most laptops handle 1080p videos under a gigabyte comfortably.
Why is it slow on my phone?
FFmpeg-WASM runs on your CPU, not hardware video encoders. Phones have less CPU, so encoding takes longer.
Can I cancel mid-encode?
Yes. The Cancel button terminates the worker immediately. You'll wait a few seconds the next time you start.