24 Edit & Convert
Audio JoinerJoin several audio files into one
Combine several audio files into one track, in any order, with smooth transitions between them.
Drop your audio files here
Several at once · MP3, WAV, FLAC, OGG, M4A · up to 150 MB in total
orTransitions
Keeps the volume steady mid-transition: natural between different songs.
Download
Free · local processing · no account
Engines and licensesAbout Audio Joiner
Audio Joiner chains several files into one. Drag them into order, trim the start or end of each one without leaving the tool and decide whether they flow with a clean cut or a crossfade. You can mix different formats, preview the mix before exporting and download it as MP3, WAV, FLAC or OGG.
What you can do with it
- 01
Build a podcast episode
Join the intro music, the interview and the outro into a single file, even if each part was recorded in a different format.
- 02
Mixes and compilations
Chain songs with a couple of seconds of crossfade for a continuous mix to work out, party or travel.
- 03
Audiobooks by chapter
Combine chapters recorded separately into one file, with clean cuts so each starts where the last one ends.
- 04
Long texts with Text to Speech
Generate a long text in parts with Text to Speech and join them here into a single voiceover.
How it works, in 3 steps
Add the files
Drop all the audio into the panel. You can mix MP3, WAV, FLAC, OGG, M4A and other formats in the same join.
Order and trim
Drag each track by its handle to reorder it and use the handles on its waveform to cut what's extra at the start or end.
Set the transition and export
Choose the crossfade length and curve, preview the result, pick format and quality and click «Join files».
Crossfades: getting them right
0 seconds
A clean cut: one track ends and the next begins with no overlap. Best for speech, podcasts and audiobooks.
1 to 3 seconds
A smooth transition between songs. Works great for compilations, workout mixes or party playlists.
5 seconds or more
A very gradual change, for ambient, relaxation or meditation music. The maximum is 10 seconds.
Equal power
Keeps the perceived volume steady through the crossfade, with no dip in the middle. Recommended almost always.
Linear
Lowers one track and raises the other at a fixed rate. You may notice a small volume dip at the midpoint.
Tips for better results
- Preview the join before exporting: click any waveform to jump to the transitions.
- For silence between two tracks, set the crossfade to zero and add a silent file of the length you need.
- To avoid quality loss, export as WAV or FLAC; for MP3, 192 kbps or more is usually enough.
- Trim each track inside the joiner and skip running every file through Audio Trimmer first.
Frequently asked questions
Can I join files in different formats?
Yes. You can combine MP3, WAV, FLAC, OGG, M4A and other common formats in the same join: format and sample rate are matched, so you only worry about the order.
What is a crossfade?
A transition where the ending track fades down while the next fades up, so the two overlap for a few seconds. You can set it from 0 to 10 seconds.
What's the difference between equal power and linear?
The equal-power curve compensates volume so the crossfade sounds even; the linear one moves at a fixed rate and can leave a slight dip in the middle. For almost everything, use equal power.
Do I lose quality when joining?
With WAV or FLAC, no: the result keeps the tracks' quality. MP3 and OGG apply lossy compression; from 192 kbps up the difference is barely noticeable.
Can I hear the result before downloading?
Yes. The preview plays the join exactly as it will be exported, trims and crossfades included. Pause with the space bar and click a waveform to jump there.