MMaster Tools
AudioRuns on your device

Trim Audio

Cut an audio clip to exactly the section you want by typing a start and end time.

How it works

  1. 1

    Drop in an audio file — it never leaves your browser.

  2. 2

    Type a start time, an end time, or both. Leave either blank to keep the edge.

  3. 3

    Trim and download the clipped WAV.

Questions

Which audio formats can I trim?

Any format your browser can decode — MP3, WAV, OGG, M4A and AAC all work in current Chrome, Edge and Firefox. Very unusual codecs may not decode, and the tool will say so rather than failing quietly.

Does my audio file get uploaded anywhere?

No. Everything happens inside your browser. The file bytes never leave your device.

Why is the output a WAV file?

WAV is the lossless format the browser can write directly without a third-party encoder. The quality is identical to the original sample data.

How precise is the trim?

The cut is made at the exact sample boundary closest to the time you entered, so precision is limited only by the file's sample rate — typically 44,100 or 48,000 samples per second.

Volume Changer

Volume Changer

Raise or lower the volume of any audio file and see the resulting peak level before you download.

Fade In

Fade In

Gradually bring an audio file up from silence at the start over a duration you choose.

Fade Out

Fade Out

Let an audio file drift down to silence at the end over a duration you choose.

Change Speed

Change Speed

Speed up or slow down an audio file by resampling it — note that pitch changes along with tempo.

Reverse Audio

Reverse Audio

Flip an audio file so it plays backwards from end to start.

Merge Audio

Merge Audio

Join two or more audio files into a single clip, in the order you choose.

Convert to WAV

Convert to WAV

Turn any audio or video file into an uncompressed WAV, with optional sample-rate and channel conversion.

Convert to MP3

Convert to MP3

Encode any audio file as an MP3 at your chosen bitrate, with mono or stereo output.