Trim Video Online — Cut MP4, WebM and MOV Locally
Trim video online by selecting an exact start and end time, then download the cut segment without uploading the source.
Loading local video processor…
About this tool
The local trimmer copies supported media streams between the chosen timestamps, avoiding a full re-encode when possible. Stream copying is fast and preserves quality, although the actual cut may align with a nearby keyframe.
How to use
- Choose a supported local file or enter the required values.
- Review the available settings and run the tool.
- Check the result, then download or copy it before closing the page.
Features
- Start and end controls with video-duration validation.
- Fast stream-copy trimming without quality loss when supported.
- Keeps available streams in the downloaded segment.
Common use cases
- Remove an unwanted intro or ending.
- Extract a short section from a longer recording.
- Prepare a clip before creating a GIF.
Common issues and tips
- Keyframe alignment can make a stream-copy cut begin slightly before or after the requested frame.
- Some browser-playable sources still use codecs the local engine cannot copy.
Privacy
Your video, image or subtitle data is processed locally in your browser and is not uploaded to Tools12345.
Frequently asked questions
Does trimming reduce video quality?
The tool uses stream copying when supported, so it does not re-encode the video.
Why is the cut point not frame-perfect?
Fast copying depends on source keyframes.
Can I trim a file larger than 200 MB?
The current browser tool limits input to 200 MB to protect device memory.