Audio Trimmer
Local only — nothing is uploaded unless you save or share it.
Trim audio online — cut a piece out of an MP3 or a recording, with nothing uploaded.
- Drop in the audio or video file
- Drag the handles across the waveform to the piece you want, and press space to hear it
- Trim, then download the MP3
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Use your browser's Share menu, then “Add to Home Screen”.
About this tool
Most of the reasons to cut an audio file are small ones. A voice memo with thirty seconds of pocket noise before it starts. An interview where the useful part is eight minutes into an hour. A song you want the chorus of for a video. A lecture recording that begins with everybody finding their seats. This is an mp3 cutter that lets you cut mp3 online without any of the usual friction: no upload, no account, no watermark, no waiting behind other people's files. Drop the file in and the sound appears as a waveform. Drag the handles in from each side to the piece you want, press space to hear exactly what you have chosen — playback plays only between the handles — and download that piece as an MP3. It works on video files as well as audio ones. Drop in an MP4 or a MOV and you cut audio from video directly — you get the trimmed sound out of it — which is the same thing people usually want when they say they need to trim audio online from a recording of a talk. Everything happens in your own browser. The file is decoded there and re-encoded there, and nothing is sent anywhere at any point — which matters more with audio than most formats, because a recording is usually of somebody, often of a conversation, and frequently of something nobody else was invited to. The honest limitations, stated where you can read them before you start: the result is a new MP3 rather than a byte-identical cut of the original, so it is a second lossy pass — inaudible at 192 kbps and above for speech and most music, but it is a re-encode and not a lossless snip. And the file has to be decoded in full first, so recordings longer than twenty minutes are refused rather than allowed to run a browser tab out of memory.
Frequently asked questions
Is my recording uploaded?
No. The file is decoded, cut and re-encoded inside your browser, and nothing is sent to us at any point. This tool has no API for that reason: an endpoint would mean receiving the recording, and audio is usually of a person and often of a private conversation. There is nothing on our side to store or delete.
Can I set the times exactly?
Yes. Dragging the handles is how most people will do it, and the two boxes underneath show what you have chosen and accept anything you would read off a player: plain seconds (90), minutes and seconds (1:30), fractions and hours (1:30.5, 01:02:03). Type in either box and the handle moves to match. Space plays the selection from wherever you are on the page, so you can nudge a handle and hear the result without going back to the button. If you would rather not use a mouse at all, tab to a handle and the arrow keys move it — a hundredth of the track per press, and a hundredth of that with Shift for landing on a word.
Can I trim the audio from a video?
Yes. Drop in an MP4, MOV, MKV or WebM and it will take the audio track, cut the piece you asked for and give you an MP3. The video itself is not produced — if you want the video trimmed rather than the sound, that is a different job and this is not it.
Is the cut lossless?
No, and it is worth being clear about it. The audio is decoded and re-encoded as MP3, which is a second lossy pass over material that was already compressed. At 192 kbps and above the difference is not audible on speech or on most music. A truly lossless cut means slicing the original stream on frame boundaries without decoding it, which is a different tool and a much narrower one — it only works when the input is already the format you want out.
Why is there a twenty-minute limit?
Because the whole file has to be decoded before any of it can be cut, and decoded audio is far bigger than the compressed file — roughly 350 KB per second, so an hour is over a gigabyte held in memory at once. Past twenty minutes a browser tab stops reporting errors and simply disappears. The check runs on the file's own duration before anything starts.
Can I cut a piece out of the middle and join the rest?
Not yet — this keeps one span and discards the rest, rather than removing a span and closing the gap. Removing an interruption from the middle of a recording is a genuinely different job and needs joining as well as cutting. Say so on the contact page if that is what you came for; it is the obvious next step and knowing somebody wants it decides whether it gets built.
What bitrate is the result?
192 kbps, which is the usual choice for speech and music alike and comfortably past the point where a second encode is audible. It is not adjustable here on purpose: the choice belongs on a converter, and this page is about where the cut goes. Trim mp3 files and recordings alike come out at the same setting.
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