Merge Audio Files Online — Free, No Upload
Combine multiple MP3, WAV, or OGG files into a single audio track. Drag to reorder, add a gap or crossfade between tracks, then download the merged file.
Drop audio files here or click to browse
Select multiple files · Drag to reorder after adding
How to Merge Audio Files Online
Add your audio files by dropping them into the upload zone or clicking to browse. You can add as many files as your device can handle — MP3, WAV, OGG, and other formats can be mixed freely. Each file is decoded to raw audio data in your browser so that they can be seamlessly joined regardless of their original format.
Once files are added, drag tracks up or down in the list to set the playback order. Use the Gap slider to add a pause between tracks (useful for separating chapters or segments), or the Crossfade slider to create a smooth fade transition between them. Click Preview Merge to listen to the result, then export to WAV, MP3, or OGG.
Common Use Cases for Merging Audio
- Join multiple podcast interview segments into one final episode file
- Combine chapters of an audiobook into a single track
- Assemble music loops or stems into a continuous mix
- Stitch together voice-over takes recorded in separate sessions
- Merge course lesson audio files for an e-learning platform
- Combine sound effects into a single audio sequence for video editing
Frequently Asked Questions
How many files can I merge at once?
There is no hard limit. You can add as many files as you like. The practical limit is your device's available RAM — each decoded audio file is held in memory during processing.
Can I reorder tracks before merging?
Yes. Drag and drop the track items in the list to set the final playback order before merging.
What is crossfade and when should I use it?
Crossfade smoothly fades out the end of one track while fading in the beginning of the next. It is ideal for music mixes or ambient audio. For speech, a small gap (0.2–0.5 s) usually works better than a crossfade.
Do all files need to be in the same format?
No. You can mix MP3, WAV, OGG, and other formats freely. All files are decoded to raw audio internally before merging, so the formats do not need to match.
Are my files uploaded to a server?
No. All merging happens locally in your browser. Files never leave your device.