🎚️ Audio Merger (Join Audio Files)
Combine several audio clips end to end: add your files, drag them into order, and download one merged WAV — all processed locally in your browser.
Joins your audio files end to end in the order shown and exports a single 16-bit WAV. Files of different sample rates are resampled to match. Everything decodes and renders in your browser with the Web Audio API — nothing is uploaded. 🔒
How the audio merger (join audio files) works
Each file is decoded to raw audio with the Web Audio API, then the clips are played back to back into an offline audio renderer in the order you set, producing one continuous track that is exported as a 16-bit WAV. Because it uses Web Audio rather than a video/ffmpeg engine, it needs no special browser flags and never uploads your files — everything happens on your device.
Files with different sample rates or channel counts are automatically resampled and matched to the highest quality among them, so mixing a mono voice memo with a stereo track works fine. The output is uncompressed WAV (large but lossless); convert it to MP3 afterwards with the WAV converter if you need a smaller file. Clips join directly with no gap or crossfade.
Frequently asked questions
How do I merge audio files?
Add two or more audio files, order them with the up/down arrows, and click "Merge & download WAV". The clips are joined end to end into one track, entirely in your browser.
What formats can I merge?
Any format your browser can decode — MP3, WAV, OGG, M4A/AAC and usually FLAC. They're decoded to raw audio first, so you can mix formats freely. The output is a single WAV file.
Why is the output a WAV and not an MP3?
WAV is lossless and encodes instantly in the browser without extra libraries. If you need a smaller MP3, run the merged WAV through an MP3 converter afterwards.
Are my audio files uploaded?
No. Decoding and merging use the Web Audio API on your device, so the files never leave your browser. It works offline once the page has loaded.