Browse files
or drag and drop it anywhere in this area
No file size limit · minimum 10 seconds · 30+ seconds recommended for analysis
Files stay on your device — no uploads · no account · private processing in this browser tab.
How it works
Add files, drag to reorder, set a crossfade length and export the merged result.
- 01
Upload
Pick a file or drop it in — decoding happens on your device.
- 02
Process
The spectral engine renders the result in this browser tab.
- 03
Download
Preview and save the output as a lossless WAV file.
Spectral engine
Frequency-domain processing tuned for voice and instrument content.
Fast
Rendered locally in this tab — no upload waiting or queue.
Free
Unlimited tracks, no account and no usage limits.
Analysis and separation results are estimates produced by signal processing, not definitive verdicts. Quality depends on the source recording.
Merging audio files cleanly
Joining audio means placing several files end to end into a single track: a DJ set from separate songs, a podcast from recorded segments, or a compilation from individual takes. Order the files, choose how they meet, and export one file.
Butt-joining two files often produces an audible click, because the last sample of one and the first of the next rarely sit at the same level. A crossfade solves this by overlapping the tail of one file with the head of the next over a chosen duration, and it also makes song-to-song transitions sound deliberate rather than abrupt.
Files with different sample rates or channel counts are conformed before merging, so a mono voice memo and a stereo music bed can safely live in the same export.
How to use the audio joiner
- 01Add two or more audio files.
- 02Drag them into the order you want.
- 03Set the crossfade length between clips.
- 04Merge and download the finished track.
Frequently asked questions
Yes. Anything your browser can decode — MP3, WAV, M4A, FLAC, OGG — can be mixed in the same session and exported as one file.
Around 20–50 ms is enough to hide a click between spoken segments. For music-to-music transitions, one to four seconds sounds natural.
Merging happens on decoded audio at full resolution. Only the final MP3 export introduces encoding loss; choose WAV to avoid it.