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  1. Home
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  3. Trim Video

Trim Video

Cut a video to a precise start and end time and create a new encoded clip.

Use this tool
Browser-local processingNo input upload to TOOLGRIDReview before copy
Formats and processing
Input
H.264/AAC MP4 video
Output
Trimmed 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

Trim a local video with start and end timestamps. The compatibility path re-encodes the result so cuts are not restricted to source keyframes.

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

Extract a demo segment

Keep 00:12 through 00:42 from a longer product recording.

Boundaries

What to check before relying on the result

  • Timestamp precision is bounded by source timing and encoder behavior.
  • Re-encoding changes the encoded bitstream and invalidates file-level signatures.
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
Extract a demo segment

Keep 00:12 through 00:42 from a longer product recording.

Continue the workflow

Inspect the source duration, set a valid start before end, process, and check both boundary frames.

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.

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