Audio Converter Online Free

Convert audio files between MP3, WAV, OGG, AAC, FLAC and M4A formats entirely in your browser. No upload to any server — 100% private and free.

⚙️ Powered by FFmpeg.wasm — the full FFmpeg audio engine running in your browser. Loads once (~30MB) from CDN on first use. Please wait for it to initialise.

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Drop audio file here or click to browse

MP3 · WAV · OGG · AAC · FLAC · M4A · WMA · Max 100MB

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Initialising FFmpeg…

About Audio Converter

This free online audio converter uses FFmpeg.wasm — a WebAssembly port of the industry-standard FFmpeg library — to convert audio files entirely in your browser. No files are ever uploaded to any server.

Format guide: MP3 — universal compatibility, good compression. WAV — lossless, large files, best for editing. OGG — open format, great for web. AAC — better than MP3 at same bitrate, used by Apple. FLAC — lossless compression, audiophile quality. M4A — Apple's AAC container, iTunes compatible.

Note: FFmpeg.wasm is a large library (~30MB). It loads once and is cached by your browser for future visits.

Updated: May 2025 · Works on Chrome, Firefox, Edge · Mobile friendly

Frequently Asked Questions

Why does it take time to load initially?+

FFmpeg.wasm is ~30MB — a full audio/video processing engine compiled to run in your browser. It loads once and is cached, so subsequent uses are instant.

Which bitrate should I choose?+

128 kbps is fine for casual listening. 192 kbps is the standard for good quality. 320 kbps is the highest MP3 quality. For FLAC and WAV, bitrate doesn't apply (lossless).

What is the maximum file size?+

Up to 100MB. Conversion speed depends on your device — a 50MB WAV file typically takes 15-30 seconds on a modern laptop.

Does this work on mobile?+

Yes, but performance is slower on mobile devices. For large files, a desktop or laptop is recommended.

✅Done!

Audio Converter Online Free

About Audio Converter

Frequently Asked Questions

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