Audio joiner
Audio joiner for any number of clips: add your files, put them in order, and download one MP3.
Free, no app, no sign-up
Add at least two files.
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This audio joiner puts two or more clips one after another in a single MP3 at 192 kbps. Add the files, then put them in order by dragging the handle beside each one, or with its up and down arrows. Between clips you can leave no gap, a pause of 1 or 2 seconds, or a crossfade of up to 2 seconds that blends one clip into the next. Press Join into one MP3 and save the file.
Questions
Is the audio joiner free?
Yes, with no sign-up and no watermark.
Does it work on my phone?
Yes, in Chrome on Android and Safari on iPhone. Add the files from your phone, and if dragging is fiddly on a small screen, the up and down arrows beside each file put them in order. If your browser can't play a file's sound, the page names that file; WAV files work in every browser.
Can I merge audio files in different formats?
Yes. Mix MP3, M4A, WAV, AAC, OGG, Opus and FLAC files as you like, and add videos for their sound (MP4, MOV, MKV and WebM). AIFF, WMA and AMR files don't open here.
How many files can I join?
Any number from two up. They're joined in the order on the screen, so check it before you press Join into one MP3.
Is there a size limit?
No limit is set on the files. The joined MP3 takes about 1.4 MB a minute, so an hour comes to about 86 MB, and a very long join can be more than some phones can handle.