How to use it
- Add your file. Drop it on the box or choose it from your device.
- Set it up. Choose the format and quality. 64–96 kbps mono is plenty for speech.
- Compress audio. Press Compress audio. Long or large files take a while on phones.
- Download. Save the result.
What happens to your file
The sound is re-encoded at the bit rate you choose. FLAC is lossless: the sound is identical and the file is usually about half the size of a WAV.
Questions
Is my file uploaded?
No. Everything happens inside your browser with FFmpeg compiled to WebAssembly. Your file never leaves your device.
Is there a size limit?
Only your device’s memory. Files up to a few hundred MB work on most computers; phones manage smaller files.