Audio to Base64 Converter

Encode audio files (MP3, WAV, OGG, M4A, FLAC) to Base64 data URIs, or decode Base64 strings back to playable audio. All processing happens in your browser.

Last Updated: September 2026
100% Client-Side — Your data never leaves your device

Drop an audio file here or click to browse

MP3, WAV, OGG, M4A, FLAC

Max 50MB

Upload an audio file to encode it to Base64

Why this tool is safe

Your data never leaves your device — everything runs in your browser.

No server uploads. Other tools send your files to their servers. Ours don't.
Zero tracking of content. We never see, store, or log anything you convert.
Works offline. Once loaded, the tool works without an internet connection.
No account required. Instantly use all tools completely free without signing up.

Frequently Asked Questions

Search below or browse through our most commonly asked questions.

We support standard audio formats like MP3, WAV, OGG, M4A, and FLAC.
Once decoded, the tool provides a built-in audio player allowing you to listen to the result directly in your browser, along with a download button.

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