Trim Audio

Cut an audio file down to a start/end time range.

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Files never leave your device — this runs entirely in your browser. Output is WAV.

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How it works

  1. 1

    Choose an audio file

    Up to 100 MB.

  2. 2

    Set a start and end time

    In seconds, within the audio's duration.

  3. 3

    Download the trimmed clip

    Exported as a WAV file.

FAQ

What audio formats can I upload?
Any format your browser can decode (MP3, WAV, M4A, OGG, etc.) via the Web Audio API.
Why is the output always WAV, even if I uploaded MP3?
WAV is lossless and simple to encode reliably in the browser without a codec library. Re-compressing to MP3 is a separate feature not built yet.
Does this tool upload my audio anywhere?
No — trimming happens entirely in your browser with the Web Audio API.

Tool4U.net — every tool runs in your browser. No file ever leaves your device unless the tool says so.