Audio to Base64

How to convert Audio to Base64 online

1. Select an audio file or paste its URL.
2. Choose the output format (data URI, <audio>, JavaScript Audio, ...).
3. Click Encode audio to Base64 and test the player.

Output formats

Choose how the result should be wrapped. The converter can return:

• txt: only the Base64 string, ready to paste into code, a database field or an API request.
• uri: a complete data: URI that you can paste in a browser address bar or use anywhere a URL is accepted.
• html audio: an HTML5 <audio controls> player.
• html source: a media element with a nested <source> tag and MIME type.
• html embed: an <embed> tag.
• html object: an <object> tag with a type attribute.
• html hyperlink: an <a> link that downloads or opens the embedded file.
• html iframe: an <iframe> that renders the content inline.
• javascript audio: JavaScript that creates and plays an Audio object.
• javascript popup: JavaScript that opens the content in a new window.
• json: a JSON object with the file name, MIME type and data.
• xml: an XML element with the data inside a CDATA section.

Tips

Keep embedded audio short: notification sounds and UI effects are ideal. Prefer compressed formats (MP3, Ogg/Opus) to keep the Base64 string small.

Base64 represents every 3 bytes with 4 characters, so the encoded result is about 33% larger than the original file (plus a few bytes for padding and the data URI prefix).