Whatever your browser can decode: MP3, WAV, M4A/AAC, OGG and FLAC in most browsers, plus the audio track of many videos.
WAV is lossless and is created instantly in the browser. If you need MP3, run it through the audio converter afterwards.
Yes, the Reverse audio tool is 100% free, unlimited and requires no sign up or installation.
No. Every operation on Toolkoa is processed privately and locally, directly in your own browser.
Nothing to install. Reverse audio runs in any modern desktop or mobile browser, and once the page has loaded you can keep using it without relying on the connection.
