How to merge audio files into one track (free, online)
Join two or more MP3, WAV or M4A files into a single track in your browser — no upload, no software, no watermark.
Whether you're stitching together voice memos, combining podcast segments, joining chapters of an audiobook, or building one long mix from several songs, merging audio files is the same job every time: put them end to end and export a single file. You don't need Audacity or a paid converter to do it.
Merge audio files in your browser
Open the Merge Audio tool
Drop in your first file, then add the rest. MP3, WAV, M4A, AAC, OGG and FLAC all work, and you can mix formats in the same merge.
Put them in the right order
Drag the files into the order you want them played. The preview shows the combined length as you go.
Export the combined track
Choose your output format and download one file containing all of them, back to back.
Can I combine 2 audio files of different formats?
Yes. The files are decoded before they're joined, so an MP3 and a WAV combine cleanly into a single output — you just pick which format you want at the end. If the sources have different sample rates or channel counts, they're matched automatically so there's no click or level jump at the joins.
MP3 or WAV for the merged file?
Export to WAV if the track is going into further editing — it's uncompressed, so nothing is lost when you re-edit. Export to MP3 if it's the final file and you're sharing or uploading it, because the size will be roughly a tenth of the WAV. There's more on the trade-off in MP3 vs WAV vs FLAC.
Cleaning up before you merge
- Trim the dead air off the start and end of each clip with Trim Audio so the joins are tight.
- If one recording is much quieter than the others, run everything through Normalize Audio first so the volume is consistent across the whole track.
- Long gaps or pauses mid-recording? Remove Silence strips them out automatically.
- Add a short fade with Fade Audio if a clip starts or ends abruptly.
Merging audio that came from videos
If your source material is video — screen recordings, interview clips, phone footage — pull the sound out first with Extract Audio, then merge the resulting files. That's the usual workflow for turning a set of recorded calls into one continuous audio file.