How this audio trimmer works
Drop in any audio file your browser can play — MP3, WAV, OGG, M4A and more. The tool decodes it with the Web Audio API and draws a waveform so you can see where the sound actually is. Type a start and end time in seconds, hit Preview selection to hear exactly what you are about to keep, then click Trim audio. The selected sample range is copied into a fresh buffer and written out as a WAV file you can play back on the page before downloading.
Because everything happens locally, there is no upload wait and no file ever leaves your device. A voicemail, an interview recording, a song — they all trim in a fraction of a second once decoded.
Trimming tips
- Use the waveform to spot silence: flat stretches at the edges are the usual trim targets.
- Preview before trimming — adjusting by a tenth of a second is often the difference between a clean cut and a clipped word.
- Trim first, then process. If the clip also needs to be louder, run the result through the Audio Volume Booster afterwards.
About the WAV output
The download is 16-bit PCM WAV at the source’s original sample rate and channel count. That means zero further quality loss after the initial decode, but also a bigger file than a compressed original — roughly 10 MB per minute of stereo 44.1 kHz audio. If you only need a format change rather than a cut, the Audio to WAV Converter does that directly, with optional mono mixdown and resampling.