AnyTool
Your files never leave your device. All processing happens locally in your browser.

How do I rotate or flip a video without uploading it or getting a watermark?

Open AnyTool's Video Rotate, drop in a clip, and rotate it 90°, 180° or 270° and/or flip it horizontally or vertically (the transforms combine), with a live in-browser preview before you export. It re-encodes to an H.264/AAC MP4 with +faststart using a self-hosted ffmpeg engine right in your browser. The video is never uploaded, the engine core is bundled (no CDN), and there is no watermark or size cap.

  • Rotate 90° / 180° / 270° and flip horizontal/vertical (combinable)
  • Live in-browser preview before export
  • H.264/AAC MP4 with +faststart; self-hosted engine, no CDN
  • 100% in your browser — no signup, no watermark, no cap

What is

Video rotation

Video rotation turns the frame by a multiple of 90° and can also mirror (flip) it horizontally or vertically — useful for footage shot sideways or upside down on a phone. The transforms can be combined and the clip is re-encoded so the new orientation is baked into the pixels. Client-side rotation runs the encoder in the browser, so the file is never uploaded.

Video Tools

Related terms

rotate 90flip videoorientationH.264ffmpeg

How to Rotate a Video

Rotate or flip a video in your browser.

25 secWeb browser
  1. 1

    Add a video

    Drop in an MP4, MOV, MKV, AVI or WebM — it stays on your device.

  2. 2

    Set the transform

    Choose a rotation (90/180/270) and/or a horizontal or vertical flip; check the live preview.

  3. 3

    Export

    Rotate and download an MP4 — nothing is uploaded.

Result: A rotated video file

Frequently Asked Questions

No — it is rotated and re-encoded entirely in your browser with a self-hosted engine.

The file never leaves your device and there is no watermark, size cap or signup, unlike server tools such as Clideo, VEED or online video editors.

Yes — pick a rotation (90/180/270) and a horizontal or vertical flip, and the transforms combine.

A live preview shows the final orientation before you export so you can confirm it.

No — there is no watermark and no resolution cap; output is a clean H.264/AAC MP4.

The +faststart flag is set so the file starts playing quickly when streamed or shared.

Detailed Explanation

Methodology

How the Video Rotator Works

AnyTool rotates and flips video entirely in the browser using a self-hosted single-threaded ffmpeg.wasm engine — the core (ffmpeg-core.js + the 32 MB wasm) is bundled from npm and served as a same-origin asset, so nothing is fetched from a CDN. A live CSS-transform preview shows the orientation before export. On apply, the clip is written to ffmpeg's virtual filesystem (MEMFS) and the transpose filter is used (transpose=1 for 90° clockwise, transpose=2 for 270°, two chained passes for 180°), with hflip and vflip available for mirroring. The result is re-encoded to H.264/AAC with +faststart and read back as an MP4 blob. Single-threaded is deliberate: the multi-threaded core needs SharedArrayBuffer + cross-origin isolation (COOP/COEP), which would block cross-origin ad iframes.

  • Runs client-side — the video is never uploaded
  • Self-hosted ffmpeg core (bundled) — no CDN
  • transpose filter: 90° / 180° / 270° rotation
  • hflip / vflip mirroring
  • Live CSS-transform preview before export
  • Re-encoded H.264/AAC MP4 (+faststart); no cap
Privacy & Security

Privacy vs Upload-based Rotators

Many online rotators upload your video and add a watermark or cap the size. AnyTool rotates locally with a bundled engine, so the clip never leaves your browser, there is no watermark or size cap and no signup, and it works offline after the first load.

Video rotation: AnyTool vs typical tools
CapabilityAnyToolTypical tools
Data handlingIn your browserOften uploaded
Rotate + flip90/180/270 + hflip/vflipVaries
Live previewCSS transformVaries
Watermark / capNoneCommon
CostFree, no signupFree/limited

AnyTool is a privacy-first client-side rotator — rotation runs locally and nothing is uploaded.