Video Rotator
Rotate or flip video using ffmpeg.wasm transpose and flip filters — 90° CW, CCW, 180°, flip H/V.
How to use this tool
- 1Upload a video file (MP4, WebM, MOV) using the upload zone.
- 2Click a rotation preset: 90° CW, 180°, 90° CCW, Flip H, or Flip V.
- 3Click Apply Rotation — a loading message appears on first use while ffmpeg.wasm downloads.
- 4Preview the rotated video and click Download Rotated MP4.
About Video Rotator
This video rotator turns clips to the correct orientation when a phone recording lands sideways.
Portrait/landscape mistakes still happen. Rotating locally avoids uploading private recordings to fix orientation.
Upload a video file (MP4, WebM, MOV) using the upload zone. Click a rotation preset: 90\u00b0 CW, 180\u00b0, 90\u00b0 CCW, Flip H, or Flip V. Click Apply Rotation — a loading message appears on first use while ffmpeg.wasm downloads. Preview the rotated video and click Download Rotated MP4. Processing stays in your browser.
Use it before social upload. Soft-rotate metadata vs true pixel rotate differ — verify in a player.
May re-encode. Verify in a player after download. Square vs non-square pixels are rare but real.
Close the tab when you finish so sensitive input is not left sitting in page memory.
Frequently asked questions
Most failures mean the browser could not fully decode the input, or the file is truncated, mislabeled, or password-protected. Video Rotator depends on ffmpeg.wasm (FFmpeg compiled to WebAssembly), so a partial decode produces empty or partial output. Re-export from the original app and retry with a smaller sample. If only one browser fails, compare Chrome with Firefox or Safari before you rewrite your whole workflow.
Treat the error as a signal that this environment is stricter or configured differently. Browser APIs reject malformed structures early instead of guessing. Convert to a boring intermediate when it helps—plain UTF-8 text, PNG, WAV, or an unlocked PDF—then retry. If the intermediate works, the original encoding was the problem. Keep that minimal sample for the next regression check.
Runtimes disagree even when feature names match. Locales, parser strictness, codec builds, and library versions differ between your browser and CI. Export the exact bytes from Video Rotator, hash them, and compare in the pipeline. Align normalization steps so both systems see the same input. Use the browser result as a reference artifact, then make CI match it.
Desktop apps win on deep feature sets, batch farms, and specialized hardware paths. Video Rotator wins on zero install, private local processing, and speed for the everyday job on this page. Choose desktop software for multi-hour editorial work or exotic edge formats. Choose this tool when you need a correct result quickly without uploading. Many people do a quick pass here first, then open the heavy suite only if an edge case demands it.
Prefer Video Rotator whenever the input is personal, unpublished, customer-owned, or under NDA, because the core transform stays in your browser via ffmpeg.wasm (FFmpeg compiled to WebAssembly). Cloud services can still help for formats your browser truly cannot decode, but you must trust their retention policy. Strip secrets before any upload. Privacy is usually the reason to stay local—not a longer marketing checklist.
Start from the best original input you still have. Change only what the destination requires. Prefer lossless intermediates when you must convert twice. Because the tool is local, iterate in small steps: tweak one setting, re-run, compare. Spot-check a short sample before batching anything important.
No account is required for normal use. The core video rotator transform runs in your browser on your device using ffmpeg.wasm (FFmpeg compiled to WebAssembly). You get on-screen output, a copy action, or a download without a mandatory ToolBrigade upload for that step. Keep your browser updated. A few lookup utilities may call public reference APIs for live fields only—they still do not need your private documents.
Lighter text, code, calculator, and many image jobs work on modern phones. Large video encodes and huge PDFs are happier on a plugged-in laptop with more RAM. Fully client-side flows can continue offline once scripts are cached; live lookups still need network. If a run seems stuck, try a smaller sample, free memory by closing tabs, and confirm the input is not truncated. Prove the path on a short fixture before blaming the algorithm.
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