Convert Audio
Change an audio file's format and bitrate, without uploading it anywhere.
What it does
Convert 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 convert 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
- Which bitrate should I pick?
- 192 kbps is transparent for almost everyone on almost any speaker. Go to 320 for music you will keep, and down to 96 for speech, where the difference is inaudible and the file is a third of the size.
- Does converting to WAV improve the quality?
- No. Converting a compressed file to an uncompressed one makes it much larger and no better — the detail was discarded at the first encode and cannot come back.
- Do my files get uploaded?
- No. This tool runs entirely in your browser, so the file never leaves your device.