Convert audio between formats with this free online audio converter. Turn MP3 into WAV, WAV into MP3, or convert M4A, OGG, FLAC and AAC — and change the sample rate or switch mono/stereo while you’re at it. Everything runs in your browser, with nothing uploaded and no signup.
Audio Converter
Convert any audio file to WAV or MP3, change the sample rate, or switch between mono and stereo. Upload a file, pick your settings, and download — all in your browser, nothing uploaded.
WAV is uncompressed and works everywhere, which makes it the safest target for editing and archiving. Lowering the sample rate or switching to mono makes smaller files; going higher does not add quality that wasn’t in the original. Everything is processed on your device.
How to convert audio
- Upload your file — MP3, WAV, M4A, OGG, FLAC or AAC. It is processed on your device.
- Pick the output format — WAV (lossless) or MP3 (choose the bitrate).
- Adjust if needed — change the sample rate or convert between mono and stereo.
- Download — your converted file is generated in the browser.
Which format should I pick?
- MP3 to WAV — use WAV for clean editing, trimming, pitch shifting or DAW import.
- WAV to MP3 — use MP3 for a smaller file to share, upload or email. 320 kbps is near-transparent; 128 kbps is smallest.
- M4A / AAC to MP3 — convert phone recordings and voice memos to a universal format.
- FLAC / OGG — turn less common downloads into a standard MP3 or WAV.
More than a format converter
Unlike most online converters, this one also lets you change the sample rate (down to 16 kHz for smaller files, up to 48 kHz) and convert between mono and stereo — handy for cleaning up recordings before editing.
Free and private
All conversion happens locally with the Web Audio API and an in-browser MP3 encoder — your file never leaves your device, there’s no signup, and there’s no watermark. Long files take a few seconds to encode to MP3. Need to trim first? Use the Audio Cutter.
Frequently asked questions
Can I convert MP3 to WAV online?
Yes. Upload the MP3, choose WAV as the output format, and download. WAV is uncompressed, which is best for editing and DAW import.
Can I convert WAV to MP3 or M4A to MP3?
Yes. Choose MP3 as the output and pick a bitrate (128, 192 or 320 kbps). It works from WAV, M4A, OGG, FLAC and AAC too.
Does it upload my audio to a server?
No. Everything runs in your browser using the Web Audio API and a bundled MP3 encoder. Your file never leaves your device.
What audio formats are supported?
Inputs: any format your browser can decode — MP3, WAV, M4A/AAC, OGG and FLAC. Outputs: WAV or MP3.
Does it work on mobile?
Yes, in any modern mobile browser. Large files convert faster on a laptop or desktop.
Is it really free?
Completely — no signup, no watermark and no limits.