Audio Joiner
Merge songs, voice notes or recordings into one file. Put them in order, choose back to back, a smooth crossfade or a gap, then save one MP3 or WAV.
🔒 Your audio is never uploaded - it's processed right here in your browser.
How it works
Add your files
Drop in two or more songs, voice notes or recordings - several at once is fine.
Put them in order
Use the arrows to move files up or down, then choose back to back, crossfade or a gap between them.
Join and save
Listen to the joined track, then save it as one MP3 or WAV.
How to join audio files into one
Whether it's a playlist turned into one long mix, several voice notes made into one message, or parts of a recording put back together, this audio joiner merges any number of files into a single MP3 or WAV.
Add the files
Press the box above and pick two or more files, or drop them in. Press + Add more any time to add others.
Put them in order
Use the up and down arrows on each row. The × removes a file.
Choose how they meet
Back to back joins them straight after each other, Crossfade blends one into the next, and Gap leaves a moment of silence. Set the seconds with the slider.
Join and listen
Press Join files, then play the result. Click the waveform to jump to any join and check it.
Save
Pick MP3 or WAV and press Save the joined file.
Frequently asked questions
How many files can I join?
As many as you like. The only limit is your device's memory - on a phone, keep the total under about 40 minutes.
Can the files be different formats?
Yes - mix MP3, WAV, M4A, OGG and FLAC freely. They're all joined into one track at the same sample rate.
What does Even out the volume do?
It measures how loud each file is and turns the quiet ones up and the loud ones down, so one track doesn't jump out. Turn it off to keep every file exactly as it is.
What's the difference between crossfade and gap?
A crossfade fades one file out while the next fades in - like a DJ mix. A gap puts a few seconds of silence between files - good for separate tracks or voice notes.
Are my files uploaded?
No. They're joined inside your browser and never leave your device - which is also why it's free and unlimited.
Joining songs for a mix?
Make your own original tracks in Swara Sound - free and unlimited.
Cut, join and reverse
More free tools
See all tools →
Audio Converter (MP3 / WAV)
WAV, M4A, FLAC, OGG and more to MP3 or WAV - a whole batch at once, nothing uploaded.
Use the tool →
Loudness Meter & Mastering
Measure LUFS like Spotify does, see who'll turn you down, and master to target in one click.
Use the tool →
Key & BPM Finder
Drop a song, get its key, Camelot code, relative key and tempo in seconds.
Use the tool →
Audio to MIDI
Turn a sung, whistled or played melody into a MIDI file for your DAW.
Use the tool →
Style Prompt Library
40+ tested style prompts for AI song generators, plus a builder - one click into the studio.
Use the tool →
Make a song
Full original songs with vocals from your lyrics - free and unlimited.
Make a song free →