Merge several audio files into one online
Join two or more audio files, even in different formats (MP3, WAV, M4A...), into a single MP3.
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Join two or more audio files, even in different formats from each other (say, one MP3 and one WAV), into a single MP3, directly in your browser.
Unlike merging plain MP3s (which already assumes the same source format), this tool first decodes each file with its own codec, whatever it is, then concatenates the resulting audio. That lets you combine clips that came from different sources without converting them by hand first.
Use cases
- Combine audio clips saved by different apps in different formats.
- Join a WAV-recorded intro with the rest of an MP3 episode.
- Stitch together audio fragments downloaded from several sources into a single file.
How it works
- 1
Upload your audio files
You can mix formats: MP3, WAV, M4A, FLAC, AAC, OGG and OPUS.
- 2
Reorder them
Use the arrows to set the final order.
- 3
Download the result
A single MP3 with everything joined.
Technical details
Uses ffmpeg.wasm: each file is decoded independently (supports MP3, WAV, M4A/AAC, FLAC, OGG/Vorbis and OPUS), and the concat filter joins the already-decoded audio signals before encoding the final result as MP3.
Frequently asked questions
Can I merge an MP3 and a WAV into the same file?
Yes, that's exactly this tool's main use case — it accepts mixed formats and always delivers a single MP3.
How is this different from 'Merge MP3'?
'Merge MP3' is meant for when all your files are already MP3; this tool accepts any combination of supported audio formats.