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Audio Trimmer

Your audio never leaves your device
Drop an audio file here or click to browse MP3, WAV, FLAC, OGG, AAC, M4A, WMA, WebM

How to Trim Audio Online

  1. 1

    Select your audio file

    Drop your audio file into the zone or click to browse. MP3, WAV, FLAC, OGG, AAC, M4A, and WMA are all supported.

  2. 2

    Set trim points on the waveform

    The interactive waveform shows your audio visually. Drag the highlighted region handles to set your start and end points, or type exact times in the input fields.

  3. 3

    Preview and adjust

    Click Play to hear your audio. The waveform scrubs in real-time so you can verify the selection sounds exactly right before trimming.

  4. 4

    Trim and download

    Click "Trim Audio" and download the result. Processing runs locally in your browser — nothing is uploaded to any server.

Frequently Asked Questions

Is my audio uploaded to a server?
No. SonoCut processes your audio entirely in your browser using WebAssembly. Your files never leave your device — no upload, no server, no storage.
What's the maximum file size?
We recommend files under 500 MB for best performance. Files up to 1 GB are supported but may be slower depending on your device. Files larger than 1 GB are blocked due to browser memory limits.
What audio formats are supported?
MP3, WAV, FLAC, OGG, AAC, M4A, WMA, and WebM audio files are all supported. The trimmed output keeps the same format as your original file.
How accurate is the trimming?
The trimmer uses stream copy with input-seeking, which is millisecond-level accurate for audio. Unlike video, audio frames are tiny, so seeking imprecision is imperceptible to listeners.