Convert Audio to MP3 Online Free

Frequently asked questions

How do I convert audio to MP3 online?

Upload your audio (WAV, OGG, AAC, M4A, FLAC, or WMA). Click "Convert to MP3". FFmpeg.wasm encodes in your browser. When done, download the .mp3 file.

Are my files sent to a server?

No. Conversion runs entirely in your browser using FFmpeg.wasm. Your audio never leaves your device.

What quality is the MP3?

The tool uses -q:a 2 (high-quality VBR, roughly 190 kbps average). Good for music and speech.

What audio formats are supported?

WAV, OGG, AAC, M4A, FLAC, and WMA. The tool reads the audio and encodes it to MP3.

Why does FFmpeg take a few seconds to load?

FFmpeg.wasm is a large WebAssembly module. It is downloaded once and cached. The first time you use the tool you will see a short loading state.

Does it work on mobile?

Yes, in browsers that support WebAssembly. Chrome and Safari on mobile work. Longer files may take more time on slower devices.

Can I convert MP3 to another format?

This tool converts other formats to MP3. For MP3 to WAV or other formats, use a dedicated converter or desktop app.

Is there a file size limit?

There is no fixed limit. Very long files may take longer and use more memory. Practical limits depend on your device.

Why use browser conversion?

No upload to a server—your audio stays on your device. Useful for quick conversion when you cannot install software.

Does it work in all browsers?

FFmpeg.wasm requires a modern browser with WebAssembly. Chrome, Firefox, Safari, and Edge (recent versions) work.