About Audio Converter

Convert between WAV, MP3, Opus, AAC and more — 100% in-browser. Part of the DevTools Surf developer suite. Browse more tools in the Audio collection.

Use Cases

• Converting podcast recordings from WAV to MP3 for distribution
• Transcoding audio files for cross-browser web player compatibility
• Reducing audio file sizes before uploading to a CMS
• Converting between formats for mobile app asset preparation

Tips

• All conversion happens in your browser — no files are uploaded
• Select the output format and bitrate before converting
• Convert WAV to MP3 to reduce file size by up to 90%

Fun Facts

• The MP3 patent held by Fraunhofer expired in April 2017, making the format completely free to use — though AAC and Opus had already surpassed it technically.
• WebAssembly (used by many in-browser converters) can run FFmpeg-based audio processing at near-native speed directly in the browser.
• AAC (Advanced Audio Coding) was designed as the successor to MP3 and was adopted by Apple for iTunes in 2003, becoming the default format for the iPod.

FAQ

Which formats?

WAV (PCM), MP3, Opus, AAC, OGG Vorbis, FLAC, WebM. Pick source and target from any combination.

What about bitrate control?

Yes — pick bitrate (kbps) for lossy formats (MP3/AAC/Opus). VBR for MP3 (-q) and Opus (--compression-level) are available in advanced options.

File size limits?

Browser memory caps around 500MB practical. For bigger files, use FFmpeg directly on your machine.