How to use the Audio Joiner tool
- Add your tracksDrop two or more audio files. MP3, WAV, M4A, OGG and FLAC can be mixed freely.
- Set the orderUse the arrows to move tracks up or down, and remove any you don’t need.
- Choose transitionsJoin directly, add a short silence, or blend tracks with a 1–5 second crossfade.
- Join and downloadPreview the result, then save it as one MP3 or WAV file.
Features
- CrossfadesBlend the end of one track into the next, like a DJ mix or a continuous playlist.
- Silence between tracksAdd 0.5–2 seconds of silence for audiobooks, lessons or podcast segments.
- Mixed formatsDifferent formats, sample rates and channel counts are matched automatically.
- Preview firstListen to the joined result before you download it.
- PrivateTracks are joined in your browser and never uploaded.
When to join audio files
- Mixes and playlists: create a continuous workout, party or wedding mix with crossfades.
- Audiobooks and lectures: merge chapters or parts into one file that’s easy to play from start to finish.
- Podcasts: attach your intro and outro music to an episode.
- Voice notes: combine several short recordings into one message.
Direct join, silence or crossfade?
| Option | How it sounds | Best for |
|---|---|---|
| Join directly | The next track starts immediately | Parts of one recording that were split |
| Silence | A short pause between tracks | Audiobooks, lessons, separate songs |
| Crossfade | One track fades out while the next fades in | Music mixes and continuous playlists |
Tips for a smooth result
- Trim long silences or unwanted parts first with the Audio Cutter.
- Tick “Normalize volume” to bring the whole file to a consistent, loud-enough level.
- Choose WAV if you’ll keep editing the result, and MP3 for sharing.
- Very long results (several hours) need a lot of memory; join them in smaller groups if your device slows down.
Need a different format first? Use the Audio Converter. Recording something new? Try our Voice Recorder.
Frequently asked questions
How do I merge MP3 files into one?+
Drop the MP3 files, put them in order with the arrows, and click “Join & download”.
Can I join files with different formats?+
Yes. You can mix MP3, WAV, M4A, OGG and FLAC; they are converted to a common format automatically.
Can I add a crossfade between songs?+
Yes. Choose a 1, 3 or 5 second crossfade under “Between tracks”.
How many files can I join?+
There is no fixed limit. The total length is limited only by your device’s memory.
Are my audio files uploaded?+
No. Everything happens in your browser, so your files stay on your device.