NoCloud Media

Video tool

Video Trimmer — Cut Start and End

Type a start and end time, hit trim. Your video never leaves your browser.

How it works

  1. 1

    Drop your video

    MP4, MOV, WebM, MKV, AVI, or M4V. The file stays on your device.

  2. 2

    Enter start and end times

    Seconds (`45`) or timecode (`1:23`, `0:00:45.5`). End must be greater than start.

  3. 3

    Trim in your browser

    By default we stream-copy the cut for speed. Enable re-encode for frame-accurate edits.

  4. 4

    Download the clip

    Output keeps the input's container by default (MP4 stays MP4).

Why use Video trimmer?

Lossless by default — stream-copy trimming doesn't re-encode, so the trimmed clip is bit-identical to the relevant portion of the source.

Frame-accurate when you need it — toggle re-encoding for cuts that land exactly where you typed, at the cost of speed.

Private — your video never leaves your browser.

Common use cases

  • Remove the first few seconds of a recording where you were setting up
  • Cut out the dead air at the end of a screen recording
  • Extract a short highlight from a long gameplay clip
  • Trim a multi-hour webinar to the 2-minute section you care about
  • Strip a music video down to the intro for a preview
  • Cut a clip to fit a platform's duration limit

About MP4 and MP4

There are two ways to trim a video: stream-copy (fast, lossless, but cut points snap to the nearest keyframe) and re-encode (slower, lossy, frame-accurate). NoCloud Media defaults to stream-copy because it's typically what you want — the small keyframe drift is invisible in most clips. When you need exact cuts (for example, to align with audio), the re-encode toggle uses H.264 at CRF 23, which matches what streaming services use.

Frequently asked questions

Is my video uploaded to a server?
No. NoCloud Media trims your video entirely in your browser using WebAssembly. Your file never leaves this tab.
Why does my trim have a black frame at the start?
Stream-copy mode snaps cut points to the nearest keyframe, which can leave a few extra frames at the start. Enable the re-encode option for frame-accurate cuts.
Can I trim multiple clips at once?
NoCloud Media trims one file at a time. If you want to stitch several clips together, trim each, then use the audio joiner (video joiner coming later).
What time formats can I type?
Seconds (`12`, `12.5`), minutes:seconds (`1:30`), or hours:minutes:seconds (`0:02:15.5`).
What's the maximum file size?
It depends on your browser's available memory. Stream-copy trimming handles large files quickly; re-encoding is memory-heavy.
Which browsers are supported?
Chrome, Edge, Firefox, and Safari 15+. We require WebAssembly and SharedArrayBuffer, both standard in modern browsers.

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