Base64 to MP3
Paste Base64-encoded audio to play it and download the file.
- Runs in your browser
- Free to use
About this tool
Base64 to MP3 turns a Base64 string into an audio file you can listen to and download, without sending it anywhere. The format is detected from the ID3 or frame header, and OGG and WAV data is handled as well. Useful for extracting voice messages, notification sounds or text-to-speech output from JSON and data URLs.
How to use it — quick steps
- 01
Enter the base64 string or data url
Type or paste the base64 string or data url in the field above. Nothing is uploaded. Use Ctrl + V to paste.
- 02
Press "Decode and preview"
Press "Decode and preview" or Ctrl + Enter. The result appears instantly below the form.
- 03
Read the result
It appears in the dark panel under the form instantly. Every block has [copy] and other actions.
Key features of this tool
Nothing leaves your browser
The processing is plain JavaScript that runs on your device: the text you paste is never uploaded to our servers or to anyone else.
Instant results
Results appear the moment you press the button, even for long inputs, and every block has copy and download actions.
Works everywhere
No installation, no account and no limits: the tool works on desktop and mobile, in any modern browser, as often as you like.
Frequently asked questions
Other audio formats?
OGG and WAV are detected and played too; the tool is named after the most common case.
The player shows but nothing plays
The data may be truncated or not audio at all; check the detected MIME type in the details table.
Are my files or data uploaded?
No. The tool is plain JavaScript that runs in your browser; the files or data you provide here are never uploaded to our servers.