How do I trim an MP4 online for free?

Drop the MP4 into this trimmer, set start and end times (seconds or slider), and download the trimmed clip. The MP4 stays in your browser the entire time — nothing is uploaded — and the result is a clean MP4 with no quality loss.

What video formats does the online video trimmer support?

MP4, MOV, WebM, and AVI. The output is MP4 (H.264) regardless of input format, so the trimmed file plays everywhere — phones, browsers, social uploads.

Is there a file size limit?

Up to 500 MB per file. Because trimming runs in your browser via FFmpeg WASM, the limit comes from your device's RAM, not from a server.

How do I set the trim points?

Enter start and end times in seconds, or drag the slider handles to select the portion you want to keep. The preview updates as you adjust.

Does trimming re-encode the video?

By default, trimming uses keyframe-aligned cuts to avoid re-encoding — fast and lossless. If you trim mid-keyframe, FFmpeg WASM re-encodes only the affected segment.

Trim MP4 Online — Video Trimmer

Trim MP4 online — free video trimmer that cuts the beginning and end of any video right in your browser. Supports MP4, MOV, WebM. No upload required.

Select a video file

MP4, MOV, WebM, AVI supported

Processing happens in your browser — files are never uploaded

Frequently asked questions

Trim MP4 Online — Free Video Trimmer

Trim MP4 (and MOV, WebM, AVI) videos directly in your browser. Set start and end points, preview the cut, and download the trimmed clip — no upload, no signup, no watermark. This online video trimmer uses FFmpeg WASM, so your file never leaves your device. Ideal for trimming social uploads, removing intros/outros, or cutting a clip out of a longer recording.

Trim MP4 in your browser

Uses FFmpeg WASM — your video is never uploaded to a server.

MP4, MOV, WebM, AVI

Drop in any common video format and get a clean MP4 out.

Lossless when possible

Keyframe-aligned cuts skip re-encoding — fast and quality-preserving.