Audio Cutter

No. This tool uses your browser's native Web Audio API and MediaRecorder API to decode and re-encode audio entirely within your browser tab. Your file never leaves your device.

You can set cut points in two ways: (1) drag the handles on the waveform — the pink markers on the left and right side of the highlighted selection, or (2) type exact times directly in the Start Time and End Time fields in the format m:ss.ms (e.g. 1:30.500 for 1 minute 30.5 seconds). Both methods sync automatically.

Keep Selection (default) extracts the highlighted segment — the audio between your start and end handles. This is useful for extracting a specific part of a track. Remove Selection deletes the highlighted section and joins the remaining parts — useful for cutting out unwanted noise or silence from the middle of a recording.

The cutting uses a decode → slice PCM samples → re-encode pipeline. Since the audio is decoded to raw PCM before slicing, there is no generation loss from the cut itself. The only quality reduction comes from re-encoding — if you select a high bitrate (192+ kbps) and a modern codec like Opus, the output quality will be virtually identical to the original.

Input: Any format your browser can decode — MP3, WAV, AAC, OGG, FLAC, M4A, OPUS, WMA. Output format depends on your browser's MediaRecorder support. Chrome and Edge offer WebM/Opus (recommended) and OGG/Opus. Safari offers MP4/AAC.

Yes — use the Trim Start or Trim End preset buttons, then drag the handle precisely to where the audio content begins or ends. The waveform makes it easy to visually identify silent sections (flat parts of the waveform).