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  1. Home
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  3. Crop Video

Crop Video

Crop a video to a rectangular pixel region and re-encode the visible area.

Use this tool
Browser-local processingNo input upload to TOOLGRIDReview before copy
Formats and processing
Input
H.264/AAC MP4 video
Output
Cropped MP4 video
Runtime
WebCodecs + Mediabunny, FFmpeg WASM fallback
Browser-local workspaceStart below with browser-local processing.

Tool code processes selected files and entered content in your browser and does not submit them to a TOOLGRID processing endpoint. TOOLGRID measures tool usage, not the content you enter.

Loading tool…

Browser-basedWhat this tool does

Crop video with explicit width, height, X, and Y values. The workspace validates even output dimensions for H.264 compatibility.

Processing starts only after you choose files and press the action button. The media engine is not preloaded on the homepage or ordinary tool pages.

Representative tasks

What you can do with this tool

Remove a screen-recording sidebar

Crop the content region while preserving the original timing and audio.

Boundaries

What to check before relying on the result

  • Crop coordinates use displayed source pixels after rotation metadata is applied.
  • Invalid or out-of-bounds rectangles fail instead of being guessed.
Mediabunny documentationffmpeg.wasm documentationMDN WebCodecs API

How to use

  1. 1

    Choose the video file from your device.

  2. 2

    Review the detected media facts and task-specific controls.

  3. 3

    Start the local job, watch progress, or cancel to terminate the worker.

  4. 4

    Play or inspect the downloaded result before replacing the source.

Use Cases
Remove a screen-recording sidebar

Crop the content region while preserving the original timing and audio.

Continue the workflow

Inspect source dimensions, set an in-bounds even rectangle, encode, and check every edge of the result.

Tips & Tricks
Start with a short representative file

Confirm codec and browser support before committing device time to a long source.

Keep the source

Every output is a new file. Retain the original until you have completed a full playback check.

FAQ

Is my media uploaded to TOOLGRID?

No. The selected files are written into an in-browser worker file system. The self-hosted encoder assets are downloaded separately, but TOOLGRID does not receive the selected media for processing.

Why can a local media job be slow?

The compatibility encoder runs single-threaded in WebAssembly and is limited by device CPU, available memory, source duration, resolution, codecs, and browser behavior.

What should I verify in the result?

Check playback, duration, seeking, video and audio synchronization, expected tracks, visual quality, and actual file size in the browser or player used by your audience.

Continue this workflow

Useful next steps

Open a nearby browser tool when you need to validate, convert, or reuse the result.

Resize VideoVideo Tools · Local→Rotate VideoVideo Tools · Local→Add Video WatermarkVideo Tools · Local→