Audio Joiner
Join audio files online for free — merge MP3, WAV, M4A, OGG and FLAC files into a single track, put them in the right order, and add silence or smooth crossfades between them. Save as MP3 or WAV. Runs privately in your browser.
100% private — your audio is processed on your device, never uploaded. Conversion happens on your device; nothing is uploaded.
Files are decoded and joined in your browser and saved as one MP3 or WAV — nothing is uploaded. Different formats and sample rates can be mixed; use the arrows to change the order.
How to join audio files
- Drop your audio files in the box.
- Use the arrows to put them in order.
- Add a gap or tick crossfade, and choose MP3 or WAV.
- Click Join audio, listen and download.
What you can use it for
- Combine podcast segments, intros and outros
- Merge voice notes or recorded lessons
- Build a continuous mix or playlist file
- Join audiobook chapters into one file
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See all free image tools →Frequently asked questions
How do I merge MP3 files?
Drop all the files in, arrange them, and click Join audio. You get one MP3 (or WAV) with everything in order.
Can I mix different formats?
Yes — MP3, WAV, M4A, OGG and FLAC can be joined together; they're converted to the same format automatically.
What does crossfade do?
It fades one file out while the next fades in, for a smooth DJ-style transition with no silence.
Are my files uploaded?
No. Everything is joined in your browser.