Audio & Video Trimmer
Cut a clip from an audio or video file by start and end time — fast and lossless, without re-encoding where possible. Runs entirely in your browser; your file never leaves your device.
Everything runs locally in your browser. Your file is never uploaded. The first run downloads the engine (~25 MB); after that it is cached.
About this tool
This trimmer cuts a single clip out of an audio or video file. Give it a start time and an end time and it returns just that segment, keeping the original container and codecs so an MP3 stays an MP3 and an MP4 stays an MP4. By default it copies the streams instead of re-encoding them, which is both fast and lossless — a useful way to grab one answer from an interview, one song from a long recording, or one scene from a screen capture.
Unlike most online clippers, nothing is uploaded. The tool loads a WebAssembly build of ffmpeg into your browser and does the entire cut on your own machine. That matters when the source is a confidential call, a raw interview, or footage you would rather not send to a third-party server. The file, and every clip you make from it, stay on your device — there is no account, no queue, and no copy left behind.
How to use it
Three steps, no signup:
- Choose an audio or video file, or drag it onto the drop area.
- Enter the start and end time — plain seconds like 90, minutes and seconds like 1:30, or 1:23:45.
- Select Trim clip, and turn on Re-encode first if you need a frame-accurate start.
The first run downloads the engine (around 25 MB); after that it is cached and subsequent trims start immediately.
Common questions
Does my file get uploaded to a server?
No. The trim runs entirely in your browser using a WebAssembly build of ffmpeg. Your file is read locally and never leaves your device, which is why the first run downloads the engine but later runs are quick.
What time formats can I enter?
You can enter plain seconds like 90, minutes and seconds like 1:30, or hours, minutes, and seconds like 1:23:45. The tool converts whatever you type into seconds before making the cut, and the end time must be later than the start time.
When should I turn on Re-encode?
By default the tool copies the streams without re-encoding, which is fast and lossless but can only cut on keyframes, so the clip may start slightly early. If the cut point looks imprecise, enable Re-encode to make ffmpeg decode and rebuild the clip for a frame-accurate start, at the cost of extra time.
Need to change the format after trimming, or pull the sound out of a video first? Try the audio format converter and the video to audio extractor. For heavier media pipelines, see our development and automation service.