How it works
- Drop several audio files. MP3, WAV, FLAC, AIFF, OGG or M4A, up to 500 MB each — they're decoded locally, nothing is uploaded.
- Order and tune. Drag the rows to reorder, pick the output format, and optionally enable a crossfade between files.
- Merge and download. The files are joined into a single track, with a waveform preview before you download.
Features
- Drag to reorder. Arrange the files in any order before merging.
- Optional crossfade. Blend each file into the next, from 10 ms up to 10 seconds.
- Output format of your choice. Export the merged track as WAV, AIFF, FLAC, MP3, OGG or M4A.
- 100% in your browser. Your files never leave your computer — the merge runs locally with ffmpeg.wasm.
FAQ
Is this merge tool free?
Yes. Anonymous users get 5 free uses per day across AudioKit's free tools — no account needed. Adding and reordering files is free: a use is only counted when you launch the merge. AudioKit Premium removes the daily limit.
Are my audio files uploaded to a server?
No. The files are decoded and joined entirely in your browser with ffmpeg.wasm and never leave your machine. The only network call is a tiny anonymous counter that tracks your daily free quota.
Which audio formats are supported?
MP3, WAV, FLAC, AIFF, OGG and M4A as input, up to 500 MB per file — you can mix formats freely. For the output you choose the format: WAV, AIFF, FLAC, MP3, OGG or M4A.
How many files can I merge at once?
There's no fixed count limit — each file just has to stay under 500 MB. The practical ceiling is your browser's memory: the tool warns you when the total passes roughly 300 MB. For very long sets, prefer fewer or shorter files, or a lighter output format like MP3 instead of WAV.
Can I avoid a hard cut between tracks?
Yes — enable the optional crossfade and set its length anywhere from 10 ms to 10 seconds; each file then blends into the next. If you also want per-track trimming, beat-snapped cuts, global fades and loudness matching, use the Medley maker, which is built exactly for that.