Convert audio files to Base64 strings and decode Base64 back to playable audio. Free online tool for developers.
Drop audio file here or click to select
Base64 audio conversion is the process of encoding audio files into text strings or decoding Base64 text back into playable audio. This technique converts binary audio data into ASCII characters, making it possible to embed audio directly in text-based formats like HTML, CSS, and JSON.
Base64 encoding is particularly useful for web development, email systems, and any application where you need to represent binary audio data as text while maintaining data integrity and playback capability.
Audio file is read as binary data (bytes)
Binary data is grouped into 6-bit chunks
Each 6-bit group is mapped to a Base64 character
Final Base64 string is generated with padding if needed
Embed small audio files directly in HTML/CSS without additional HTTP requests, create data URIs for inline audio, and reduce server load.
Perfect for: Sound effects, notification sounds, small audio clips
Include audio in HTML emails without external dependencies, ensure audio plays even when external resources are blocked.
Perfect for: Email notifications, audio greetings
Send audio data in JSON responses, create self-contained API responses, and avoid file storage complexity for small audio files.
Perfect for: REST APIs, GraphQL responses, webhook payloads
Bundle audio assets directly in app code, reduce network requests, and ensure audio works offline.
Perfect for: App sounds, background music, voice prompts
Most popular audio format with excellent compression. Good balance between file size and quality. Widely supported across all platforms and browsers.
Uncompressed audio format with high quality but large file sizes. Excellent for professional audio work and when quality is paramount.
Open-source audio format with good compression and quality. Smaller file sizes than MP3 at similar quality levels. Growing browser support.
High-quality audio format developed by Apple. Better quality than MP3 at similar bitrates. Excellent for iOS and macOS applications.
Bitrate (higher = better quality)
Sample rate (44.1kHz standard)
Channels (mono vs stereo)
Compression algorithm
Base64 increases size by ~33%
Longer audio = larger strings
Higher quality = larger files
Consider memory usage
Keep audio files under 1MB for optimal performance
MP3 for general use, WAV for high quality, OGG for open source
Ensure audio format is supported by target browsers
Always verify audio plays correctly after conversion
Use Base64 for small audio files (under 1MB) that need to be embedded directly in code or documents. Ideal for sound effects, notification sounds, and small audio clips.
Base64 encoding increases file size by approximately 33% due to the conversion from 8-bit binary to 6-bit ASCII representation. This is a fixed overhead.
Only if the Base64 string represents valid audio data. The tool validates the input and creates a playable audio element if it's valid. Invalid strings will show an error.
MP3 is the most widely supported format with good compression. For better quality at similar file sizes, consider OGG Vorbis. WAV is best when quality is paramount.