Audio Converter
MP3, WAV, OGG, M4A, FLAC: convert audio from one to the other, up to ten files at a time.
About this tool
A dictaphone that produces M4A files an older player refuses, a FLAC sound library too heavy for a phone, an OGG file your editing software ignores, a studio WAV that needs to be an MP3 before it will fit in an email: converting audio is one of the most mundane chores in digital life. Drop your files — up to ten at once — pick the target format, and take them back one by one or as a single ZIP. The bitrate lives in the collapsed settings, from 96 to 320 kbps for the compressed formats. WAV and FLAC are lossless, so the setting does nothing there, and this audio converter says so rather than showing you a slider that has no effect.
As everywhere on Wootil, no file is uploaded and no account is asked for. Conversion to WAV even takes a shortcut: the sound is decoded by the browser and rewritten directly as PCM, with no engine to download at all — it is immediate, which is handy when you only need one file readable by an old piece of software. For the other formats an ffmpeg engine loads once inside the tab, stays in cache, and is then reused by all five audio and video tools on the site. Progress is shown file by file so you always know where the batch stands, and file names are kept with only the extension changing, which spares you the classic pile of ten files all called “output”.
Frequently asked questions
Which formats are supported?
In: MP3, WAV, OGG, M4A, AAC, FLAC, OPUS and WMA. Out: MP3, WAV, OGG, M4A and FLAC. So you can just as easily bring a studio WAV down to MP3, move an MP3 into an M4A container for Apple devices, or archive something as lossless FLAC for the long term.
Does converting to MP3 and back to WAV restore the quality?
No, and nobody can do that. MP3, OGG and M4A are lossy formats: whatever the compression threw away is gone for good. Going back to WAV gives you a heavier file, not a better one. If quality matters, always start from the least compressed original you have, and pick FLAC when you want to archive without loss.
How many files can I convert at once?
Ten per batch, processed one after another with progress shown file by file. That limit keeps the tab responsive and memory under control. As soon as there is more than one file, a “Download all” button gathers the results into a ZIP archive, which is also assembled inside your browser rather than on a server.
Which bitrate should I choose for an MP3?
192 kbps is an excellent compromise for speech as well as everyday music listening: the file stays light and the difference is inaudible on most ears and most speakers. Go up to 320 kbps for music you intend to keep, or drop to 128 or even 96 kbps for a spoken recording you just need to send quickly.
Is it really free, with no sign-up?
Yes — the tool is free, needs no account and has no usage limit. Processing happens locally in your browser, so your data never leaves your device.