Free Audio Trimmer
Audio Trimmer cuts audio files on a waveform: drag to select a part or type exact start and end times, then keep it or cut it out of the middle. Add fades of up to 30 seconds or peak normalization, and export MP3 at 128–320 kbps or lossless 16-bit WAV. Video sound tracks open too.
- Output:
- MP3 128–320 kbps or 16-bit WAV
- Edits:
- Keep or cut out, fades, normalize
- Length:
- Up to about one hour
- Price:
- Free
- Runs:
- Locally, in your browser
- Uploads:
- None: files never leave your device
- Account:
- Not needed
Quick answers
Is my audio uploaded?
No. The file is decoded, cut and encoded inside your browser, so it never leaves your device.
Can I remove a part from the middle?
Yes. Select the part you do not want and choose “Cut it out”: the two remaining pieces are joined with a tiny crossfade so there is no click.
Processed on your device: your files are never uploaded. How it works
Network activity in this tab
What this page has requested since you opened the site in this tab. An upload is any request that sends data: POST, PUT, PATCH or a request with a body.
No uploads: nothing has been sent from this page.
No network requests yet.
To see every request, open your browser's developer tools (Network tab).
How to use the Audio Trimmer
- Drop an audio file (or a video, to use its sound track) or click to choose one.
- Drag on the waveform to select a part, or type exact start and end times. Use Play selection to check it.
- Choose whether to keep the selection or cut it out, and add fades or normalization if you like.
- Pick MP3 or WAV, export, preview the result and download it.
Credits & open source
Our own code plus open-source libraries. Thank you to the people who make these projects.
- wavesurfer.jsAudio waveform display with selectable regions. © katspaugh and contributors · BSD-3-Clause
- lamejsMP3 encoder (port of LAME), loaded as a separate unmodified chunk. © LAME project; JavaScript port by Alex Zhukov; ESM fork by Breezystack · LGPL-3.0
Web platform APIs used: Web Audio API, File API, Keyboard Events.
Full license texts: third-party notices · all credits
Frequently asked questions
Which formats can I open?
Anything your browser can play: usually MP3, WAV, M4A/AAC, OGG, Opus, FLAC and WebM, plus the sound of MP4, WebM and many MOV videos.
Does exporting MP3 lose quality?
MP3 is a lossy format, so choose 256 or 320 kbps for music. WAV export is lossless (16-bit PCM).