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

How do I crop a video online without uploading it?

Open AnyTool's Video Crop, drop in a clip, drag the crop box (or pick an aspect preset like 16:9, 9:16, 1:1, 4:3 or 4:5) over the preview, and it crops with a self-hosted ffmpeg engine in your browser. The video never leaves your device, the engine is bundled (no CDN), and there is no watermark.

  • Draggable crop box + aspect presets (16:9, 9:16, 1:1, 4:3, 4:5)
  • Works on mobile (touch) and desktop
  • Self-hosted engine — no CDN, no upload
  • 100% in your browser — no signup, no watermark

What is

Video cropping

Video cropping removes unwanted areas around the edges of the frame, keeping a chosen rectangle — often to a target aspect ratio such as 9:16 for vertical video. Client-side cropping maps the on-screen selection to the video's real pixels and re-encodes in the browser, with no upload.

Video Tools

Related terms

aspect ratioreframe9:16crop rectangleffmpeg

How to Crop a Video

Crop a video to a region or aspect ratio in your browser.

25 secWeb browser
  1. 1

    Add a video

    Drop in a clip — it stays on your device.

  2. 2

    Set the crop

    Drag the crop box or pick an aspect preset.

  3. 3

    Export

    Crop and download — nothing is uploaded.

Result: A cropped video

Frequently Asked Questions

No — cropping runs entirely in your browser.

The clip never leaves your device and there is no watermark, size cap or signup.

Yes — presets for 16:9, 9:16, 1:1, 4:3 and 4:5, plus a free draggable box.

Selecting a preset locks the crop box to that ratio as you drag.

Yes — the crop box supports touch, so you can drag and resize it on mobile.

The selection is mapped to the video's real pixels before encoding.

Detailed Explanation

Methodology

How Video Crop Works

AnyTool crops video in the browser with a self-hosted ffmpeg engine (no CDN). You position a draggable, resizable crop box over the preview (mouse or touch) or pick an aspect preset — 16:9, 9:16, 1:1, 4:3, 4:5 — which locks the box ratio. The on-screen rectangle is mapped to the video's intrinsic pixels using the displayed-size-to-source scale factor, clamped to even integers within bounds, and passed to ffmpeg's crop=w:h:x:y filter; the result is re-encoded with H.264 while copying the audio. Everything runs on the device.

  • Runs client-side — the video is never uploaded
  • Self-hosted ffmpeg core — no CDN
  • Draggable/resizable crop box (mouse + touch)
  • Aspect presets 16:9, 9:16, 1:1, 4:3, 4:5 + free
  • On-screen rect mapped to real pixels, even-clamped
  • Audio copied through; no backend, no watermark
Privacy & Security

Privacy vs Upload-based Croppers

Most online croppers upload your video and many add a watermark or cap the size. AnyTool crops locally, so the clip never leaves your browser, there is no watermark or cap and no signup, and the crop box works on phones as well as desktops.

Video cropping: AnyTool vs typical tools
CapabilityAnyToolTypical tools
Data handlingIn your browserOften uploaded
Aspect presets16:9/9:16/1:1/4:3/4:5Varies
Touch crop boxYesVaries
Watermark / capNoneCommon
CostFree, no signupFree/limited

AnyTool is a privacy-first client-side cropper — cropping runs locally and nothing is uploaded.