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GeekFormat

Audio to Base64

Drag audio here, or click on selection

Support MP3, WAV, OGG, AAC, etc., maximum 20MB

Free online tool to convert audio files (MP3, WAV, OGG) to Base64 strings and Data URI Schemes. Ideal for HTML5 embedding, API debugging, and secure local encoding.

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Use Cases

  • Embedding audio files directly into HTML5 web pages or CSS/JS files using Data URI Schemes.
  • Encoding audio blobs into Base64 strings for REST API request bodies (JSON/XML) and WebSocket transmission.
  • Debugging speech recognition and voice processing APIs by generating test payloads.
  • Storing small audio clips directly in database records or configuration files.

Features

  • Multi-format Audio Support: Instantly convert MP3, WAV, OGG, M4A, and WebM files into Base64 text strings.
  • Data URI & MIME Detection: Automatically detects audio MIME types and generates ready-to-use Data URI Schemes for HTML5 <audio> tags.
  • API & JSON Ready: Perfect for encoding audio blobs for REST API payloads, JSON config files, and WebSocket transmission.
  • Secure Local Conversion: All encoding happens locally in your browser. No audio data is uploaded to any server, ensuring 100% privacy.

How to Use

  1. 1.Upload your local audio file (MP3, WAV, OGG, M4A, etc.) or drag and drop it into the tool.
  2. 2.The tool automatically detects the MIME type and converts the audio to a Base64 string.
  3. 3.Preview the result and choose between raw Base64 or Data URI format.
  4. 4.One-click copy the string to use in your HTML code, API parameters, or database.

FAQ

What is the difference between raw Base64 and Data URI?

Raw Base64 is just the encoded string of the file. A Data URI Scheme includes the MIME type prefix (e.g., 'data:audio/mp3;base64,...'), which allows you to use the string directly in HTML <audio> tags or CSS background properties without needing a separate file path.

Which audio formats are supported?

Our tool supports all major audio formats including MP3, WAV, OGG, M4A, and WebM. The tool automatically detects the correct MIME type for each format during conversion.

Is it safe to convert private audio recordings here?

Yes, it is completely safe. GeekFormat's Audio to Base64 tool operates entirely on the client-side (in your browser). Your audio files are processed locally using JavaScript and are never uploaded to or stored on our servers.

Why use Base64 for audio in APIs?

Base64 encoding allows binary audio data to be transmitted over text-based protocols like JSON and XML. It simplifies API integration by allowing audio to be sent as a string parameter rather than using complex multipart/form-data file uploads.