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Trim Audio Online

Cut a section out of an MP3, WAV, M4A, FLAC, or OGG file by start and end time, in your browser. Output as MP3. Nothing uploaded.

Drop a file here, paste with Ctrl+V, or

Accepts .mp3, .wav, .m4a, .aac, .flac, .ogg, .opus, .mp4, .mov, .webm · Processed on your device, never uploaded

Runs on FFmpeg compiled to WebAssembly (a 31 MB download the first time, then cached). Your file stays in this tab.

About this tool

Make a ringtone, cut the silence off a recording, or keep the one useful minute of an hour-long file. Enter the start and end in seconds and the section is exported as an MP3 at the bitrate you choose. Any common audio file works, and video files are accepted too, in which case only the audio is kept.

How to use it

  1. Drop your MP3, WAV, M4A or AAC file into the box above, or click to browse. Nothing is uploaded.
  2. Adjust the options if you want; the defaults suit most files.
  3. Click the button and wait a moment.
  4. Download the result.

Questions

Can I trim without re-encoding?

The trimmed section is encoded to MP3 at high quality; for a lossless cut, export to WAV with the MP3 to WAV tool first and trim that.

How do I make an iPhone ringtone?

Trim to under 40 seconds, convert the MP3 to M4A, and rename the extension to .m4r.

Is it free, are files uploaded, which browsers work: the general questions are answered once for the whole site.

Format guides

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MP4 to MP3.mp4 → .mp3WAV to MP3.wav → .mp3M4A to MP3.m4a → .mp3FLAC to MP3.flac → .mp3OGG to MP3.ogg → .mp3MP3 to WAV.mp3 → .wavMP3 to OGG.mp3 → .oggWAV to OGG.wav → .ogg