How to merge audio files
- Choose the format to save: MP3 or WAV, and the MP3 quality.
- Add your files by choosing them or dropping them on the box above. Add more at any time.
- Put them in order with the arrows, then press Merge audio.
- Download the joined file.
Common uses
- Combine parts of a recording that was split into several files, such as a long lecture or a phone call.
- Join voice memos into one file to send or transcribe.
- Make one continuous track for a workout, a party or a slideshow.
- Put an intro, the main recording and an outro together for a podcast episode.
Things to know
- Volume: files recorded at different levels keep their own loudness. If one is much quieter, make it louder first with the increase volume tool.
- Length: the result is simply the files’ lengths added together. A very long merge (several hours) needs a lot of memory; on phones, keep merges shorter.
- Quality: the joined audio is saved once as MP3 at the quality you choose, or as uncompressed WAV.
MP3 or WAV?
MP3 is small and plays everywhere, ideal for sharing and listening. WAV is uncompressed and much larger (about 10 MB per minute in stereo), ideal if you’ll keep editing the merged audio in another app.
Getting the order right quickly
Files are listed in the order you add them. If your recordings are numbered, such as part1, part2 and part3, select them together in the file picker and check the list before merging; move any that landed out of place with the arrows. The merged file is named merged-audio, so rename it afterwards to something you’ll recognise.
Privacy
Your files are joined inside your browser. They’re never uploaded, so private recordings and unreleased music stay on your device.
Questions
Can I join files in different formats?
Yes. You can mix MP3, M4A, WAV, FLAC and OGG files in one merge. They're all decoded to the same format and joined into a single MP3 or WAV.
How do I change the order?
After adding files, use the up and down arrows next to each one. The files are joined from top to bottom.
Is there a gap between the files?
No. Each file starts as soon as the previous one ends, exactly as the files are. If a file has silence at its start or end, that silence is kept; trim it first with the cut audio tool for a tighter join.
What happens if one file is mono and another stereo?
The result is stereo, and the mono file plays equally in both speakers, so nothing is lost.
Last reviewed 7 November 2026