Video Trimmer

Upload your video, pick a start and end point, download just that clip. Free, no sign-up, runs entirely in your browser.

Whether you're cutting the boring intro or outro off a clip, or pulling a single highlight moment out of a longer recording, you set the start and end points down to a tenth of a second — with sliders or by typing exact numbers — and preview the result before you download it.

How it works

  1. Upload your video. MP4, MOV, WEBM, MKV, or AVI, up to 300MB.
  2. Pick a start and end point. Two values in seconds — the resulting clip length updates live as you type.
  3. Download the trimmed video. Processed entirely in your browser, without re-encoding quality whenever possible.

Why Stelluna

Frequently Asked Questions

Is it free?
Yes, no account needed, no limit on how many videos you trim.

Does my video get uploaded anywhere?
No, trimming runs entirely in your browser using your device's own video processor — your video is never sent to a server.

Does trimming reduce video quality?
If you're only cutting the end (start stays at 0), the video stream is cut directly without any re-encoding — zero quality loss. If you also change the start point, the video is automatically re-encoded at high quality so it can start cleanly at that exact frame.

What format is the output?
The same format as your source video whenever possible (MP4 stays MP4, WEBM stays WEBM) — formats that can't be targeted directly (like AVI) fall back to MP4 (H.264 + AAC).

Do I need to sign up?
No.

How precise can I trim?
You can set the start and end points to 0.1-second precision, either with the sliders or by typing exact numbers — the resulting clip length updates live as you adjust.

Is my video stored anywhere after I download it?
No. Since your video never leaves your browser's memory, closing the tab or refreshing the page wipes both the original file and the trimmed result completely — nothing is kept.

Which devices and browsers does it work on?
Any modern browser with WebCodecs support — recent versions of Chrome, Edge, Firefox, and Safari, on desktop or mobile. If your browser doesn't support the required APIs, you'll see an error when you try to trim.