FFreeTool.wang

Audio Trimmer and Clip Cutter

Clip a decodable audio segment by start/end time and export MP3.

Audio trimmer

Runs in one local browser worker. Files are never uploaded.

ffmpeg.wasm · local

Audio trimming re-encodes as MP3 for deterministic timestamps.

How to use Trim Audio

Clip boundaries depend on audio frames and timestamps. The current page outputs MP3 only, with no WAV or fade control; MP3 is normally re-encoded and lossless frame copying is not promised.

  1. Choose audio and wait for its complete duration.
  2. Enter start and end times.
  3. Set MP3 audio bitrate and start trimming.
  4. Check edges, clicks, and actual duration before download.

Available controls

  • Start time
  • End time
  • MP3 output; WAV and fade controls are not currently available

What it helps with

  • Quick ringtone, speech, or music clipping
  • Media is read and transcoded in this browser tab and is not uploaded to FreeTool to perform the task.

Compatibility and limits

  • Current output is MP3 only, not WAV
  • Compressed-frame boundaries can differ by milliseconds
  • No fades, noise reduction, or multitrack editing

Frequently asked questions

Why is there a click at the edge?

A non-zero-crossing cut can jump. The current page has no fade control, so adjust the start/end position.

Can MP3 be cut losslessly?

Some frame-aligned copies are possible, but this workflow may re-encode for timing and compatibility.

Is audio uploaded?

Media is read and transcoded in this browser tab and is not uploaded to FreeTool to perform the task.

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