Audio & Video Trimmer
betaThis free trimmer cuts a section out of any audio or video file. Set the start and end (or grab them from the player), and it exports just that part with ffmpeg running in your browser — great for making an MP3 ringtone or trimming a clip before sharing. Your file is never uploaded.
Runs entirely in your browser via ffmpeg.wasm — the file never leaves your device.
How to use Audio & Video Trimmer
- 1 Drop an audio or video file onto the box, or click to browse.
- 2 Play it, then set Start and End — type the times or click "Use current" at the playhead.
- 3 Leave "Fast (no re-encode)" ticked for a quick lossless cut, or untick it for a frame-precise cut.
- 4 Click Trim, then preview and download the trimmed file.
Frequently asked questions
Is my file uploaded to a server?
No. Trimming runs entirely in your browser via ffmpeg.wasm, so the audio or video never leaves your device.
Can I make a phone ringtone?
Yes. Drop an audio file (or a video — the audio is kept), set the section you want, and export it. Audio is saved as MP3, which works as a ringtone on most phones.
What does "Fast (no re-encode)" do?
It copies the media streams instead of re-encoding, so the cut is instant and lossless — but it snaps to the nearest keyframe, so the start can be off by a fraction of a second. Untick it for an exact cut (slower, re-encodes).
Which formats can I trim?
Common video (MP4, WebM, MOV) and audio (MP3, M4A, WAV, Opus) files. The first run downloads the ~31 MB engine, then it is cached.