Audio Converter

Convert audio files between MP3, WAV, AAC, and OGG formats securely in your browser.

Click to upload audio

Supports MP3, WAV, AAC, M4A, OGG

Output Format

Conversion Status

Waiting for conversion...

Note: On first use, the browser needs to fetch the audio engine (~30MB). This happens only once and is cached for future visits.

Universal Audio Transcoder

Whether you need an MP3 for your car stereo, a WAV file for high-quality editing, or an OGG file for web development, ToolBox Audio Converter handles it all. We use the industry-standard FFmpeg library compiled to WebAssembly.

Frequently Asked Questions

Is this really private?

Yes. We use WebAssembly (WASM) to run FFmpeg directly in your browser. Your audio files are processed locally on your device.

Why is it downloading a file on load?

The tool needs to download the core audio processing engine (ffmpeg-core.wasm, ~30MB) once to work offline.

Can I convert large files?

Yes, but performance depends on your device's RAM and CPU. For files over 100MB, it might take a while.

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