Audio Joiner
Merge MP3, WAV, M4A, and more into one seamless file. Add clips, drag to reorder, and mix formats freely — MP3 plus WAV plus M4A in the same project. 100% in your browser, nothing uploaded.
Drop an audio file here
or click to browse
How it works
Load and add files
Drop in your first track, then use "Add file" to append more. Mixed formats are welcome.
Reorder the clips
Each file lands on the timeline as a clip. Drag them into the order you want them to play.
Export one file
Everything is re-encoded uniformly and exported as a single MP3, WAV, FLAC, M4A, or OGG.
Frequently asked questions
How many files can I join?
Load a first file, then use "Add file" to append as many more as you like. Since everything runs in your browser, you're limited only by your device's memory, not an upload cap.
Can I combine different formats and sample rates?
Yes. Mix MP3, WAV, M4A, and more in one project. Every clip is decoded and re-encoded to a single uniform output, so mismatched formats or sample rates join together cleanly.
Can I control the order?
Yes. Each file becomes a clip on the timeline, and you can drag clips to reorder them until the sequence is exactly right before exporting.
Is it private?
Completely. Joining and exporting run on your device with WebAssembly — none of your audio is uploaded to a server.
Need to trim clips before joining? Use the MP3 cutter or even out levels with the audio normalizer, all part of the full Audio Studio.