Cut a clip out of an audio file

The job

Trimming a recording to the useful thirty seconds avoids a whole editor for a ten-second task. The browser decodes the audio and writes the cut as uncompressed WAV — sample-accurate and compatible with everything that follows.

How to do it

Pick the audio file, read its duration, then set the start and end as seconds or m:ss. The exported file keeps the original sample rate and channels, trimmed at the nearest sample.

• Cut half a second early/late rather than tight — breaths and consonant attacks clip badly.
• For a phone recording, trimming silence at both ends usually halves the file.

Worked example

A 3:42 voice memo trimmed to 0:41–1:05 produces a 24-second WAV that drops into a presentation or an editor without conversion — the audio never left the browser.

Limits

Output is WAV only — uncompressed, which means large (roughly 10 MB per stereo minute at 44.1 kHz). There is no mp3 export, no fades, no level adjustment; normalize afterwards if the clip is quiet. Files up to 200 MB, clips up to 60 minutes.