Merge audio files
Combine several audio files into one track.
Add at least two files to merge.
Runs in your browser. Your files never leave your device.
- Reorder before merging
- Optional crossfade
- Nothing uploaded
How to merge audio files
- Drop two or more audio files here.
- Use the arrows to set the order, and set a crossfade if you want one.
- Click Merge and download to get the combined file.
How the crossfade works
The crossfade slider goes from 0 to 3 seconds in half-second steps. At 0, one file simply ends and the next starts. Above 0, the end of each file fades out on a straight line while the next file fades in over the same span, so the join sounds smooth instead of abrupt.
The crossfade only applies between files, not before the first track or after the last one, so the overall start and end of the merged file are untouched.
Matching different formats
Mixing formats and quality levels in one merge is common, for example a WAV recording plus a couple of MP3s. To avoid audibly downgrading anything, the merge picks the highest sample rate and the most channels found among the files you dropped and resamples everything else up to match before combining.
Reordering and output format
- Use the up and down arrow buttons on each file to set the play order, and the X to drop a file you added by mistake.
- The merge button only turns on once at least two files are in the list.
- Output is MP3 or WAV only. Choose WAV if you plan to edit the merged file further, or MP3 for a smaller file to share.
Merge audio FAQ
Can I merge different formats together?
Yes. MP3, WAV, M4A, OGG and FLAC files can all be combined in one merge, and the output uses one consistent sample rate and channel count.
What does the crossfade do?
It blends the end of one file into the start of the next with a linear fade, instead of a hard cut. Set it to 0 for a plain join, or up to 3 seconds for a smooth blend.
What happens if my files have different sample rates or channel counts?
Every file is resampled to match whichever input has the highest sample rate and the most channels, so nothing gets downgraded to the lowest common quality.
Is there a limit on how many files I can merge?
No fixed limit, but very long combined audio depends on your device's memory.
Which order will the files play in?
The order shown in the list, top to bottom. Use the arrow buttons to move a file up or down, or the X to remove one, before merging.
Can I export as FLAC or OGG instead of MP3 or WAV?
No, only MP3 or WAV are offered as the merged output, whatever formats you dropped in.
What bitrate is the merged MP3?
192 kbps, a fixed setting that is not adjustable on this tool.
Are my files uploaded?
No. Decoding, mixing and encoding all happen in your browser.