Audio Trim Tool
Load an audio file, set a start and end time, and export just that section as a lossless WAV — sample-accurate, no quality loss, all in your browser.
ℹ Trimming is done on the decoded samples, so there’s no re-encoding loss; the cut section is exported as WAV (browsers can’t write MP3/AAC). Everything runs locally — your file is never uploaded.
How It Works
Your file is decoded to raw audio samples in the browser. When you set a start and end, the tool copies exactly the samples in that range — sample-accurate — into a new WAV file. Because it works on the decoded audio rather than re-compressing, the trimmed section is a clean, lossless copy at the original sample rate and channel count. Nothing is uploaded; the work happens entirely on your device.
The output is WAV (uncompressed). If you started from an MP3, the trimmed WAV will be larger than the equivalent slice of the MP3, but it won’t lose any further quality. For MP3 output you’d re-encode the WAV in a desktop app.