Audio Joiner
Audio Processing LaboratoryConcatenate multiple audio files into one seamless track.
What is Audio Joiner?
Audio Joiner stitches two or more clips into a single continuous file, right in your browser. Add your files, drag them into the order you want, and download the combined result. Each clip is decoded and concatenated with the Web Audio API on your device, so nothing is ever uploaded.
How to use Audio Joiner
Add your clips
Drag two or more audio files onto the drop zone, or click to browse. MP3, WAV, M4A, AAC, OGG, FLAC, and WebM are accepted, and you can keep adding more with the smaller drop zone below the list.
Set the order
Reorder the list by dragging the handle on each row, or use the up and down arrows. The numbered badges show the exact sequence the clips will play in.
Trim the lineup
Remove any clip you do not want with its X button. You need at least two clips in the list before joining.
Join and download
Click Join clips to concatenate them into one WAV, which downloads automatically. All the work happens locally, so nothing is uploaded.
Common uses
- Combine several voice memos into one recording
- Stitch podcast segments into a single episode file
- Assemble music clips into one continuous mix
- Merge chapters of an audiobook into one file
- Chain sound effects into a single cue
- Join interview parts recorded separately into one track
Why choose FreeTools
100% private
Your files are processed inside your browser and are never uploaded to a server.
Free, no account
No sign-up, no watermark, no paywalled “premium” tier. Just open a tool and use it.
Instant
No upload, no queue, no server round-trip — work starts the moment you drop a file.
Runs in your browser
Built on open web standards. Works on any modern desktop browser, nothing to install.
No upload size caps
Nothing leaves your device, so there’s no server file-size limit — only your machine’s memory.
Yours to keep
Results download straight to your device in clean, standard file formats.