MP3 Joiner Online
Merge multiple MP3 files into one. Add crossfade transitions, adjust per-track volume. Free and private.
How to Join MP3 Files
1. Open the Audio Joiner on cut.audio 2. Add your MP3 files (drag and drop multiple files at once) 3. Arrange them in the order you want 4. Set crossfade duration between tracks (for smooth transitions) 5. Adjust per-track volume if needed 6. Export the combined file as MP3, WAV, FLAC, or OGG
Crossfade Transitions
A crossfade smoothly blends the end of one track into the beginning of the next. Instead of an abrupt cut, the audio fades out and in simultaneously. This is essential for: • Music medleys — seamless transitions between songs • Podcast production — smooth transitions between segments • Audio compilations — professional-sounding joins Set the crossfade duration per transition. 0 seconds = hard cut. 2-5 seconds = smooth blend.
Per-Track Volume
Different audio files often have different volume levels. The joiner lets you adjust the volume of each track independently before merging. This ensures your merged file has consistent volume throughout — no jarring jumps between quiet and loud tracks.
Try it now — free in your browser
No download. No signup. Your files never leave your device.
Open Audio JoinerFrequently Asked Questions
There's no hard limit. Add as many files as your device's memory can handle. For practical purposes, most users merge 2-20 files at a time.
Yes. You can load a mix of MP3, WAV, FLAC, and OGG files and merge them into a single output file in any of these formats.
No. All processing happens in your browser using WebAssembly. Your files stay on your device.