Combine Audio Files

About Combine Audio Files

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

1. Add two or more audio files. Select multiple audio files to combine.
2. Set the order. Use the up/down arrows to arrange the sequence.
3. Join and download. One combined MP3, tracks joined end-to-end.