Audio File Joiner
Combine Multiple Audio Files Sequentially
Need to use Audio File Joiner right now?
A real FFmpeg build compiled to WebAssembly runs the whole join entirely inside your browser.
Add two or more audio files, in order
Processed locally in your browser — never uploaded
Joins audio files end-to-end in the order shown, decoding and re-encoding each so files of different formats or sample rates can be combined into one MP3.
Features
- Runs entirely in your browser
- Privacy-first — your data is never uploaded
- Real-time, instant results
- 100% free, no sign-up required
- Works on desktop, tablet, and mobile
- No installation needed
Who uses this tool?
People also search for
About Audio File Joiner
Combining several audio files into one continuous track — joining recorded segments from a session, stitching together separately-recorded parts of a podcast, assembling a compilation — is a sequential concatenation task that doesn't need a full audio editor. This tool joins any number of audio files end-to-end, one after another, using a real FFmpeg build compiled to WebAssembly running entirely inside your browser.
Files join in exactly the order shown in the list, with up/down controls to rearrange them before combining — the same reordering pattern used throughout this site's file-combining tools, making it quick to set the right sequence visually rather than needing to rename files or rely on alphabetical ordering.
Every file is decoded and re-encoded together into a single output using FFmpeg's concat filter, which means files of different original formats or sample rates can be joined successfully into one consistent MP3 — the filter handles reconciling those differences during the join rather than requiring matching source formats.
This joins tracks sequentially (one after another in time), which is a different operation from mixing — for combining tracks so they play simultaneously at the same time instead, like a voice-over layered under background music, use the Audio Merger tool instead.
How it works
- Add two or more audio files. Select multiple audio files to combine.
- Set the order. Use the up/down arrows to arrange the sequence.
- Join and download. One combined MP3, tracks joined end-to-end.
Examples
Combining recorded session segments
Input
3 separately recorded audio files
Output
one continuous MP3 with all segments joined in order