Join several audio files into one, in the order you choose, with an optional cross-fade between them. Files with different sample rates or mono and stereo mixed together are matched automatically, and everything happens on your device.
How it works
- Drop two or more audio files, or videos whose sound you want.
- Drag them into order, and add a cross-fade or a pause between them if you like.
- Download one MP3 or WAV.
Questions
- Does my file get uploaded?
- No. The models and all processing run inside your browser on your own device. You can verify this yourself: open your browser’s DevTools, watch the Network tab, and process a file: there are no uploads. After the first visit most tools also work fully offline.
- Can I join files with different formats?
- Yes. An MP3, a WAV and a phone recording can be joined together. They are brought to the highest sample rate among them, and to stereo if any of them is stereo, with a proper resampler rather than a shortcut that would add artefacts at the seams.
- What does the cross-fade do?
- It overlaps the end of one file with the start of the next, fading one out as the other comes in, so there is no gap and no click. An equal-power fade keeps the loudness steady through the overlap.