Audio Joiner
Join songs or recordings into one track, with smooth crossfades between them.
- Files never leave your device
- 100% free
- No sign-up
- No watermark
- Works offline after first load
How to merge audio files
- Add your audio files.
- Order them, trim each one and choose crossfade or gap.
- Click Join & save and download.
About Audio Joiner
New tool.
Good for
- New tool
Frequently asked questions
How do I merge MP3 files?
Add the files, put them in order with drag and drop or the arrows, set a crossfade if you want smooth transitions, then click Join & save.
Can I trim each song before joining?
Yes. Click a track to open it in the waveform editor, select the part to keep and click Trim to selection — its volume, fades and effects can be changed too.
Can I join different formats?
Yes — MP3, WAV, M4A, OGG, FLAC and audio from videos can be mixed; everything is converted to the same format and sample rate.
What does Match loudness do?
Each track is measured and brought to −16 LUFS, so quiet and loud recordings play at the same volume.
Are my files uploaded?
No. The tracks are joined in your browser, so your audio never leaves your device. Some formats use FFmpeg (WebAssembly), which downloads once — about 32 MB — and is then cached.