Merge audio files
Your files are processed on your device. We never upload them.
Audio is read and written with Mediabunny. MP3 files are made with LAME and FLAC files with libFLAC; browsers without their own AAC encoder use FFmpeg's. Apple Lossless files follow Apple's ALAC code.
How to merge audio files
- 01A ▸Choose two or more audio files, or drop them on the page.
- 02A ▸Put them in order with the up and down buttons.
- 03A ▸Pick a pause between files and the format to save.
- 04A ▸Select Merge audio, listen to the result, and download it.
Questions
Can I join different formats?
Yes. MP3, M4A, WAV, FLAC, OGG, and the others can be mixed. Files at different sample rates are matched up, and a mono file in a stereo set plays in both ears.
Are my files uploaded?
No. Your files are processed on your device. We never upload them.
Does merging lose quality?
Saving as WAV loses nothing. Saving as MP3 or M4A compresses the joined sound once, which at High (192 kbps) is very hard to hear.
Can the files overlap or crossfade?
Not yet. You can add a pause of up to two seconds between them. To fade one into the next, fade them first with Trim audio.
How many files can I join?
As many as your device's memory allows, since the whole result is held while it's saved. An hour of stereo audio is fine on a computer; on a phone, keep it under about 15 minutes.