Frequently asked questions

Audio Converter Online is a free web app for converting audio between formats (MP3, WAV, FLAC, M4A, OGG, OPUS and more), extracting audio from video, and editing audio with trimming, merging and 20+ effects. It is made by Gloath Limited in New Zealand.

No. It runs in your browser with nothing to install, and free features need no account.

No. Files are processed on your device and never sent to our servers - on any plan. We never store your audio.

There is no fixed limit. Because processing happens on your device, the practical limit depends on your device memory - typically several hundred MB on phones and multiple GB on computers.

Formats other than MP3 and WAV use a high-performance converter engine (ffmpeg compiled to WebAssembly). It downloads once (about 10 MB compressed) and is then cached by your browser.

Once the page and converter engine have loaded, conversions work without an internet connection. You can also install it as an app from your browser menu.

Yes. Select part of the waveform and click "Add region". Each region has its own full set of effects, on top of the effects for the whole file. Free users get 2 regions per file; Pro is unlimited.

Press play in the editor. You hear the result with all effects applied; toggle "Hearing effects" to compare with the original.

Yes. Every edit (trim, delete, fade, paste and more) can be undone with the undo button or Ctrl/Cmd+Z.

Space = play/pause, Delete = delete selection, Ctrl/Cmd+Z = undo, Ctrl/Cmd+Shift+Z = redo, Ctrl/Cmd+A = select all, Ctrl/Cmd+C/X/V = copy/cut/paste, L = loop, R = add region, arrows = move cursor, Ctrl + scroll = zoom.