What the tool changes
FFmpeg selects the requested time range and writes an H.264/AAC MP4 for predictable playback.
Trim Video
Trim a video by start time and duration. See exactly what changes, what to check afterward, and how long the private result stays available (6 hours).
◈ Encrypted transfer◷ Short retention⊘ No watermark◎ Works on every device
Trim Video: the short answer
Trim a video by start time and duration. FFmpeg selects the requested time range and writes an H.264/AAC MP4 for predictable playback.
What to know before you use Trim Video
Trim Video can affect quality, metadata, compatibility, or structure. The notes below show what to check in plain language.
What can go wrong
Boundary frames are re-encoded and the exact cut can depend on source timing and keyframes.
How to verify the result
Check the first and last second, audio sync, captions, and the final duration.
A three-step Trim Video checklist
- Before: Keep the source file and open it once to confirm that it is not damaged.
- During: Review every setting shown for Trim Video instead of accepting a value you do not understand.
- After: Before deleting the source file, open the result and confirm it holds up against everything covered above.
Trim Video tip: Compare file size with visible and audible quality. A smaller download is useful only when the destination can open it and playback still holds up.
Before using Trim Video for important work, browse all file tools, read the file-format guide, or review how temporary uploads are protected.
How long the result stays available
Your Trim Video result is stored for 6 hours unless you sign in and save it to your private library.
Trim Video questions
Does Trim Video replace my original file?
No — Trim Video always writes a new, separate result, leaving your uploaded file untouched.
What can go wrong when using Trim Video?
Boundary frames are re-encoded and the exact cut can depend on source timing and keyframes.