freesabaiConvert audio to WAV
Turn MP3, M4A, OGG, Opus, FLAC or WebM into uncompressed WAV, for audio editors, players that only take WAV, or speech-to-text tools. Several files at once. It runs in your browser; your files are not sent anywhere.
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Result
How to use
- Choose or drop audio files, as many as you like.
- Pick the bit depth, sample rate and channels. For speech-to-text or AI tools (Whisper and the like) press "16 kHz mono": the file gets much smaller and speech stays clear.
- Press "Convert to WAV" and watch the progress bar (you can cancel). Listen, then "Save" each file or "Save all as ZIP".
Good to know
- WAV is not compressed, so it is big: stereo at 44.1 kHz and 16 bits takes about 10 MB a minute. A WAV (RIFF) file holds at most 4 GB; when the result would be bigger the page says so first: choose mono, 16-bit, a lower rate, or split the file.
- Turning an MP3 or M4A (AAC) into WAV does not make it sound better: what compression threw away does not come back, you only get a file other programs open easily. 24-bit and 32-bit float help when you will edit the sound further.
- Which files open depends on the browser; Safari and iPhones cannot open some OGG, Opus or WebM files. Files with DRM, such as songs from streaming apps, cannot be converted. Song titles and artists are not carried over. Use this tool only with files you have the right to use.
- The browser decodes the whole file into memory first. Past about an hour, or about 20 minutes on a phone, the page warns you first.
- For small files to listen to or share, use Audio to MP3; for the sound of a video use Extract audio from video; to record what your computer is playing, try Sound Catcher.
Your files stay on your device
Everything runs in your browser (the WAV is written in a second thread of the browser, still on your device). Your audio and the WAVs are not uploaded to freesabai or anyone else, and nothing is kept in the browser: close the page and it is gone. The site counts only that this page was opened and how often a result was saved (no file names or contents, and you can turn counting off at the bottom of the site; see the privacy policy).
Report a problem or suggest an idea
A file that will not convert, or an option you would like? Tell us on the feedback page, no sign-up (please do not attach files with personal data).
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Questions and answers
Which WAV format should I choose?
16-bit suits most uses and opens everywhere. 24-bit and 32-bit float are for audio editors; the files are bigger and they do not make sound from an MP3 any better.
What settings for transcription or AI tools?
Press the 16 kHz mono button. Most speech-to-text tools, Whisper among them, use this; the file is much smaller and speech stays clear.
Why is the WAV so much bigger than the original?
WAV is not compressed: stereo at 44.1 kHz and 16 bits takes about 10 MB a minute. A WAV file holds at most 4 GB; past that the page asks for a lower rate, mono or a split.
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