Audio merge
Concatenate multiple audio files via the ffmpeg.wasm concat demuxer. Reorder by drag. Stream copy keeps codec untouched, but all inputs must share the same codec and sample rate.
Related tools
Voice recorder
Record from your mic and download as MP3 / WAV. Everything runs in your browser.
Real-time transcription
Live transcribe your mic with Whisper running inside your browser. Segments split on silence, displayed as chat bubbles, click to copy. No audio or model data leaves your device. Performance and supported model size depend on your hardware (CPU / GPU / RAM).
Audio file transcription
Upload an MP3 / WAV / M4A file and transcribe it with Whisper running inside your browser. Long files are chunked automatically. No audio or model data leaves your device. Performance and supported model size depend on your hardware (CPU / GPU / RAM).