What it does
ActuallyFreeTools’s audio studio shows your recording’s waveform and converts it between MP3, M4A (AAC), WAV, FLAC, OGG and Opus for free. Drag the handles to trim, add fades, switch to mono to halve the size of speech, and even out the loudness so quiet recordings are easy to hear. It runs on your device with ffmpeg; nothing is uploaded.
How to use it
- Drop the audio file (or a video).
- Choose the format, quality and any trim or volume options.
- Convert and download.
Questions people ask
Can it convert WhatsApp voice notes?
Yes — Opus and OGG voice notes convert to MP3 for any player.
What does loudness normalisation do?
It raises quiet recordings and tames loud ones to a standard listening level.
Which format is best quality?
FLAC and WAV are lossless; 320 kbps MP3 is excellent for listening.
Is Audio studio on ActuallyFreeTools really free?
Yes. There is no sign-up, no daily limit, no watermark and no paid tier. Nothing is held back for paying users.
Are my files uploaded anywhere?
No. Audio studio runs inside your browser, so your files are processed on your own device and never sent to a server. That is also why there is nothing to meter or charge for.
Related tools
Last updated 30 October 2026. ActuallyFreeTools tools run entirely in your browser.