Audio to Base64
HomeEncode an audio file to a base64 data URI for HTML, JSON, or APIs. Source bytes only — no re-encode. Runs in your browser. Your file never leaves this device.
- Choose a WAV, MP3, M4A, or video-with-audio file
- Pick data URI (default) or raw base64
- Click Encode
- Copy the string or download a .txt file
Related tools
FAQ
No. Encoding runs entirely in your browser. Nothing is sent to us.
Data URI includes the MIME type prefix (data:audio/mpeg;base64,…). Raw is only the base64 characters. Most embeds want the data URI.
No. We base64 the file bytes as-is. Convert to MP3 first if you want a smaller string.
Browsers often reject huge clipboard writes. Use Download .txt instead. We warn above about 1.5 MB.