Audio Joiner (Merge MP3, WAV, M4A Files)
Put several audio files in any order and join them into one WAV with a common sample rate and channel layout. See exactly where each file starts and ends. Runs in your browser; nothing is uploaded.
- Runs in your browser (no upload)
WAV, MP3, M4A (AAC), OGG/Opus, FLAC, WebM and other formats this browser can play. Up to 200 MB per file
How to use
- Choose or drag and drop two or more audio files (or use “Try with three sample sounds”).
- Reorder them with ↑↓ and choose the output sample rate, channels and silence between files.
- Press “Join files”, check the start and end time of each file and the verification, then download the WAV.
FAQ
Can I join files with different sample rates or mono and stereo?
Yes. The browser resamples them to a common rate; mono becomes stereo with the same sound on both sides, or stereo is folded to mono.
Can I save as MP3?
MP3 is not supported. Besides lossless WAV (16-bit PCM), browsers that can encode Opus can also save a small WebM (Opus) file.
Is my audio uploaded?
No. Reading and joining happen only inside your browser.
Notes & limitations
- What you enter is processed only on this page and is not sent to YUCTS servers.
- Only formats this browser can play are accepted (supported formats differ between browsers and versions).
- Resampling is done by the browser, so its quality differs slightly between browsers and each file’s length may vary by about one sample.
- Up to 20 files, 30 minutes in total and 200 MB per file. WAV is large (about 11 MB per minute at 48 kHz stereo) and long joins may run out of memory on phones.
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