How it works
Complete the job in three clear steps
- Choose a video file and trim times from your device.
- Set the timing or output options and create a trimmed MP4 video.
- Preview and download the result before closing the page.
Private Lucaden media tool
Trim Video Online
Cut a video to a selected start time and duration, then export a compatible MP4.
Free to use Your media stays on this device; the FFmpeg WebAssembly runtime downloads when needed.
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Important
Check the result before relying on it
Keep an untouched copy of important source files. Browser processing depends on available device memory, and you should inspect every downloaded result before deleting the original.
Practical details
What this Lucaden tool does
The clip is decoded from the chosen start point and re-encoded to H.264 video with AAC audio for predictable playback. Re-encoding avoids keyframe-only cuts that begin at the wrong frame.
Lucaden writes the source into FFmpeg's temporary in-browser file system, creates the output, then removes both temporary files. The source media is not uploaded to Lucaden.
Included capabilities
- Start and duration controls
- Frame-accurate re-encoding
- H.264 and AAC MP4 output
- Local result preview
Useful for
- Remove unwanted openings
- Create short social clips
- Extract a demonstration
- Trim meeting recordings
Questions
About this tool
Are time values in seconds?
Yes. Decimal seconds are accepted for finer cuts.
Why is the output not instant?
Accurate trimming re-encodes the selected section in the browser.
Open-source foundations
Built transparently
Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.