Online Video Trimmer
Use Online Video Trimmer, review the result, and keep the original until the output is checked.
How to use Online Video Trimmer
- Add the clips to trim; each one is cut with the same selected range.
- Play the preview and press Set Start from Playhead and Set End from Playhead, or type Start Time (seconds) and End Time (seconds) directly.
- Press Preview Selection to hear the range before converting.
- Set Quality (1-35, lower is better) and Output Format, then press Trim Video.
What Online Video Trimmer actually does to your file
Cutting means decoding and re-encoding around the selected window, so the frames at both edges are real new frames rather than a marker in the file - which is why the output can differ subtly in colour or bitrate from the source, and why long clips take time. Times are seconds to one decimal. Repeating the trim on the same file compounds the loss, so go back to the original each time.
Online Video Trimmer FAQ
What does Online Video Trimmer do?
Trim videos online for free—cut MP4, MOV, AVI, MKV, and WebM to exact start and end times. Preview in browser, no watermark, no sign-up.
Which files work with Online Video Trimmer?
This category commonly supports MP4, MOV, AVI, MKV, WMV, FLV, WebM, and 3GP. Use the accepted file types shown in the uploader, because support varies by browser and by the engine behind each tool.
Does trimming re-encode the file?
Trimming to exact frames needs a re-encode, which costs quality and time. A fast cut on the nearest keyframe keeps quality but can be off by up to a second, so check the duration of the download.
Will my original file be changed?
No. The work is done on a copy in this tab by a WebAssembly build of ffmpeg, and the result arrives as a separate download, so your original is still there if you need it.
How is my file processed?
It is not uploaded. The processing is done locally by a WebAssembly build of ffmpeg, so the practical ceiling is your device's memory and the limit shown beside the uploader - no queue, no account, no copy on a server.
Is the Online Video Trimmer free?
Yes. The Online Video Trimmer is free with no trial limit, subscription, or watermark on downloads. You can use it for personal and commercial projects without creating an account.