Trim Audio
Cut a section out of an audio file, with a fade in or out if you want one.
What it does
Trim Audio works on MP3, WAV, M4A, OGG, FLAC, AAC and OPUS with ffmpeg and audio engines compiled for the browser, so the recording or video is processed by your own computer or phone — the same programs a desktop editor uses, without installing one.
When you need it
Usually right before sending or publishing: a video too heavy for WhatsApp, a voice note full of hum, a clip that needs captions because the feed plays it muted, an interview to turn into text.
Limits and caveats
Long or high-resolution files take as long as your device needs, and a phone is slower than a laptop. The engines download once, the first time, and come from KIVO itself. The original file is never changed: you always download a new one. Everything happens in your browser, so the file never leaves your device.
How to trim audio
- Drop or choose your MP3 file.
- KIVO processes it instantly — no waiting for uploads.
- Download the result. That's it.
Everything happens on this device: no file is uploaded and nothing leaves the browser.
Frequently asked questions
- Why add a fade?
- Because a cut in the middle of a waveform makes an audible click. A one-second fade removes it, and is the difference between a clip that sounds edited and one that sounds broken.
- Do my files get uploaded?
- No. This tool runs entirely in your browser, so the file never leaves your device.