Combine two or more audio files into one track. Reorder them, add a crossfade or gap, then export. Right in your browser.
Up to 12 files per merge. Every file is resampled to match the highest sample rate in the batch, so mixing a 44.1kHz MP3 with a 48kHz WAV works fine.
A crossfade blends the end of one track into the start of the next over about 300ms, so there's no hard cut. A gap instead inserts a second of silence between tracks. Pick whichever fits, or none for a direct cut.
No. Every file is decoded, joined, and re-encoded locally in your browser. Nothing is uploaded, and the files never leave your device.