Cut Audio
Trim audio files.
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Trimming audio without re-encoding it
Cutting audio means selecting a start and end point and keeping what falls between them. How that is done determines whether quality survives. Compressed formats such as MP3 store audio in frames, and cutting exactly on frame boundaries lets a tool copy the underlying data through untouched — a lossless trim. Cutting at an arbitrary point requires decoding and re-encoding the affected region, which introduces a small generational loss.
The other detail that separates a clean edit from an obvious one is the boundary itself. Ending a clip mid-waveform produces an audible click, because the signal jumps instantly to silence. A short fade of a few milliseconds at each cut point removes it entirely, which is why professional editors apply one automatically and why an unfaded cut always sounds amateur.
Why we built this tool
The everyday jobs are removing dead air at the start of a recording, cutting a clip out of an interview, shortening a track to fit a video, or extracting a ringtone.
Audio recordings are often personal or confidential — interviews, voice notes, calls, unreleased music. Uploading them to an editing site means handing over the full recording, including the parts you were about to cut out. Ours decodes and edits the audio in your browser using the Web Audio API and a WebAssembly encoder, so the file stays on your device. No upload, no duration limit, no account, and no audio watermark on the export.
Tips and common mistakes
- Place cuts in natural pauses rather than mid-word.
- A few milliseconds of fade at each cut point removes the click a hard edit produces.
- Preview the selection before exporting; boundaries are easy to misjudge on a waveform.
- Work from the highest-quality source you have, since every re-encode of a lossy file costs a little more.
Quick start: using Cut Audio
- Load the audio file you want to trim.
- Set the start and end points using the waveform display.
- Preview the selection before committing to it.
- Place your cuts in silent gaps where possible to avoid clicks.
- Export the trimmed audio and download it.
Join clips afterwards with Merge Audio, or strip dead air automatically using Remove Silence.