Audio Trimmer
Cut a clip down to just the part you want.
Drop an audio file to trim
MP3, WAV, M4A, OGG or FLAC · up to 100 MB · drag & drop, paste, or click to browse
Runs entirely in your browser — nothing you enter is uploaded or sent to a server.
Exports are WAV, which is uncompressed and therefore a much bigger file than the MP3 you probably started with — the audio quality itself is unchanged. We don't offer MP3 export because every in-browser MP3 encoder is built on LAME, whose licence we won't ship. Read our full disclaimer.
About this tool
Most of the time you don't want to edit audio, you just want less of it: the good thirty seconds out of a five-minute recording, an intro trimmed off a voice memo, one line from an interview. This does that and nothing else. Drop a file in, the waveform appears so you can see where the sound actually is, drag the start and end to the part worth keeping, and export it. Everything happens in the page — the file is decoded by your browser and never uploaded, which also means it works on a recording you'd rather not hand to a website.
Example
Recorded a four-minute voice memo but only need the last forty seconds? Drag Start to 3:20, leave End at the finish, check it with Play selection, and export. The result is those forty seconds, cleanly cut.
How to use
- 1Drop in an audio file — MP3, WAV, M4A, OGG and FLAC all work if your browser can play them.
- 2Drag the Start and End sliders; the kept section is highlighted on the waveform.
- 3Press Play selection to hear exactly what you'll get before exporting.
- 4Export as WAV — the file downloads straight to your device.
Features
- A real waveform, so you can see where the speech or music is rather than guessing at timecodes.
- Preview the exact selection before you commit to it.
- Optional soft edges, which remove the click you otherwise get from cutting mid-waveform.
- Handles mono and stereo at whatever sample rate the original used — no resampling.
Frequently asked questions
Why can't I export as MP3?
Every MP3 encoder that runs in a browser descends from LAME, which is LGPL-licensed. This site ships only permissively-licensed code (MIT, BSD, Apache), and because our JavaScript is bundled into the page, LGPL would place conditions on our own code. Rather than quietly take that on, we export WAV and tell you why.
The WAV is much bigger than my MP3 — did something go wrong?
No, that's expected. WAV stores audio uncompressed, so a minute of stereo is roughly 10 MB regardless of what the source was. The audio hasn't been degraded — quite the opposite. Run it through any converter afterwards if you need a smaller file.
What does the soft-edges option do?
It fades the first and last few hundredths of a second. Cutting audio at an arbitrary point usually lands mid-waveform, and the jump from silence to full signal is audible as a click at each end. The fade is short enough that you won't hear it as a fade, only as the absence of that click.
How long a file can I load?
Up to 100 MB, but bear in mind the whole file is decoded into memory to draw the waveform, so a very long recording will be slow on a phone. For hour-long audio you'll get better results splitting it up first.
Is my recording uploaded anywhere?
No. Your browser decodes the file locally and the trimmed version is built in the page — there's no server involved at any point, which is rather the point for a personal voice memo.
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