Join Audio Files
Put audio files together in the order you choose, with an optional gap between them.
Free No signup Runs in your browser — nothing uploaded
What it does
Join Audio Files reads the whole document before doing anything, so what comes back is either valid output or a specific error with the position that caused it — not a partially rewritten file.
When you need it
Usually when something has already gone wrong: a config file an application will not load, an API response that has to be read by a human, or an export that has to be checked before it goes anywhere near a database.
Limits and caveats
Key order is preserved as it appears in the input. Very large documents are limited by your device's memory rather than by an upload cap, since the parsing happens locally. Everything happens in your browser, so the file never leaves your device.
How to join audio files
- Drop the files.
- Put them in the order you want.
- Join, and download one file.
Frequently asked questions
- Can I mix formats?
- Yes — an MP3, a WAV and an M4A join fine. They are decoded and re-encoded to one format, which is slower than a straight copy and is the only thing that works when the inputs disagree.
- Why would I want a gap?
- A second of silence between recordings is the difference between a compilation and a jump cut. For chapters of an audiobook or separate takes it is usually worth it.
- Do my files get uploaded?
- No. This tool runs entirely in your browser, so the file never leaves your device.