Join the tracks.
Keep the flow.
Combine MP3, WAV, and M4A files into one continuous track — in the order you choose, on your device, with no upload.
How do I merge audio files for free? Add two or more files, arrange the order with the arrows, and press Merge to MP3 (or WAV for lossless). The tracks are decoded and joined sample-to-sample on your device — no gap, no upload.
Audio merger
Tracks join in the listed order — use ↑ / ↓ to reorder. Mixed formats and mixed mono/stereo work; everything is normalized internally before joining.
What "merging" means for audio
Audio files are just long lists of samples. Merging decodes each file back to raw samples, glues the lists end to end, and encodes one new file. That's why mixed formats work here — an MP3 and a WAV become the same thing (raw samples) before they're joined. And because the glue happens at the sample level, there's no gap or fade between tracks unless the source files themselves contain it.
Getting a good result
- Order first — the list order is the playback order; reorder with the arrows before merging
- Trim the edges — silence at the start or end of source files shows up in the merge; the audio trimmer removes it
- MP3 vs WAV — MP3 (192 kbps) is small and universally compatible; WAV is lossless and roughly 10× the size
- Mono + stereo mixes fine — mono files are spread to both channels when joined with stereo material
Common uses
Joining lecture recordings into one file. Combining song segments into a DJ-style mix. Stitching voice notes into a single memo. Merging practice takes for a teacher. And pairing with the video to MP3 extractor: pull the audio out of several videos, then join them here. Related: record a voice memo straight in the browser, trim it, and merge it with the rest.
How do I merge MP3 files into one?
Add two or more audio files, arrange the order, and press Merge to MP3 (or WAV). The files are decoded and joined into a single continuous track on your device — nothing is uploaded.
Which audio formats can I merge?
Anything your browser can play: MP3, WAV, M4A/AAC, OGG, and FLAC. You can mix formats in one merge — everything is decoded to the same internal format first, so a WAV and an MP3 combine cleanly.
Will there be a gap or click between tracks?
No gap — the decoded audio is joined sample-to-sample. If the original files have silence at their edges you will hear that silence; trim it first with the audio trimmer for seamless transitions.
What quality is the merged MP3?
192 kbps — transparent for speech, music playback, and sharing. If you want zero loss, export as WAV instead: it is a bigger file but an exact copy of the decoded audio.
Can I merge audio from videos?
Yes, if the file is an audio container like M4A. For sound inside MP4/MOV videos, extract it first with the video to MP3 tool, then merge the results here.