Encode audio files to base64 data URLs online.
Drop audio here or click to upload
Files stay in your browser — never uploaded
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Quick answers to common questions
No. All audio processing happens in your browser using the Web Audio API.
Yes. 100% free with no signup required.
Most browsers decode MP3, WAV, OGG, AAC/M4A, and WebM. Export is WAV.
Limits depend on your device memory. Most files under 50MB work well.
Your data is processed entirely in your browser. Nothing is sent to any server.