Handytool
AudioFreeRuns locally

Audio Joiner

Merge multiple audio files into one, with optional crossfade.

.mp3.wav.ogg.m4a.aac.flac.opus
Format

About the Audio Joiner

Join multiple audio files into a single track without installing anything. Add your MP3, WAV, M4A, or FLAC clips, drag them into the right order, and either hard-join them end to end or blend them with a smooth crossfade. Handytool shows the total duration as you build the mix and exports MP3, WAV, or M4A — all processed locally in your browser, so your audio is never uploaded.

Audio Joiner features

  • 01

    Reorder and merge any clips

    Add as many files as you like, then move each one up or down to set the play order. Mismatched sample rates are normalized automatically so the join never glitches.

  • 02

    Crossfade or hard join

    Set a crossfade of up to several seconds to blend one clip smoothly into the next, or keep it at zero for a clean back-to-back concatenation.

  • 03

    Choose your output format

    Export the merged result as MP3, WAV, or M4A. The running total-duration readout tells you exactly how long the finished track will be.

Audio Joiner FAQ

How do I merge audio files into one?
Add two or more audio files, drag them into the order you want, choose a crossfade length or leave it at zero, then click Join. Download the combined file when it's ready.
Can I add a crossfade between tracks?
Yes. Raise the crossfade slider to overlap and blend the end of each clip into the start of the next, which is great for seamless playlists and mixes.
Do the files have to be the same format?
No. You can mix MP3, WAV, M4A, OGG, and FLAC inputs. They are re-encoded to a common format during the merge, so the result plays cleanly.
What formats can I export?
MP3 for universal playback, WAV for lossless quality, or M4A for efficient AAC audio.
Are my audio files uploaded?
No. The merge runs in your browser with WebAssembly, so your files stay on your device.

Related tools

Audio →

Explore other tools

All tools →