Audio Trimmer
Cut a section out of an audio file by dragging the range across a waveform.
Processing: This tool runs entirely in your browser. Your input and any file you open stay on your device — nothing is uploaded to a server. Decoded entirely in memory, so length is limited by your device rather than a server quota. Files over about 20 minutes are slow.
How to use the audio trimmer
- Open an audio file — MP3, WAV, M4A, OGG or FLAC.
- Set the start and end of the section you want.
- Trim, listen to the result, then download it.
About this tool
The waveform shows where the sound actually is, which makes finding the start of a phrase far quicker than scrubbing blindly. Set the start and end, and the selected region is highlighted before you commit.
The fade option matters more than it sounds. Cutting mid-waveform leaves the signal jumping from silence to full level, which is audible as a click at each end. A five-millisecond ramp removes it without being perceptible as a fade.
Browsers can decode MP3, M4A, OGG and FLAC, but the only format they can reliably write is WAV — so the output here is WAV. Exporting MP3 would mean bundling an encoder several times the size of this entire site, which is not a trade worth making for a tool you use once.
Common uses
- Taking a clip out of a recording.
- Removing silence from the start of a voice memo.
- Cutting a ringtone-length section from a song.
Frequently asked questions
- Why is the output a WAV rather than an MP3?
- Browsers can decode MP3 but cannot encode it without a bundled codec that would dwarf the rest of the site. WAV is what a browser can write reliably and losslessly.
- Why add a fade at the cut points?
- A cut in the middle of a waveform jumps from silence to full level, which you hear as a click. A five-millisecond ramp removes it inaudibly.
- Is my audio uploaded?
- No. It is decoded and processed in the page on your device.