Audio merger for joining MP3 and other audio files into one: add your files, drag them into order, preview each one, and download a single file. It mixes formats too, so you can join MP3, WAV, M4A and more in one go. It’s free, there’s no sign-up, and your files never leave your device.
How to use the audio merger
- Tap Choose file and select all the files you want to join. You can pick several at once.
- Drag the files into the order you want, or use the up and down arrows. Tap the play button on any file to check it.
- Tap Add files if you forgot one, or the cross to remove one.
- Choose a format under Save as, press Join files, then download the result.
What people use the audio merger for
- Podcasts. Join an intro, the main recording and an outro.
- Voice notes. Combine several voice memos into one file to send.
- Mixes and playlists. Put songs together into one continuous file.
- Audiobooks and lessons. Join chapters or parts into a single track.
- Ringtones and sounds. Combine short clips into one.
Why use this audio merger?
Many online audio mergers upload every file to a server and make you wait. This audio merger works in your browser, so it’s private and there’s no upload time. Files with different formats, sample rates or mono and stereo sound are matched automatically, so the joined file plays smoothly from start to finish. The total length is shown as you add files.
How the audio merger works
Different audio formats store sound in different ways. This tool uses FFmpeg, the free, open-source engine behind many professional audio apps, to read each file, bring them all to the same quality settings, and join them end to end into one new file. Everything happens on your own device.
Tips for joining audio files
- Select all your files at once. On the first screen you can choose several files together, and the audio merger opens with all of them ready to arrange.
- Trim first, then join. If a recording has silence or mistakes at the start or end, clean it up with the audio trimmer before merging, so the joins sound smooth.
- Even out the volume afterwards. Files recorded on different devices can have different loudness. After joining, use Keep editing this file and the Volume tool’s Even out option to make the whole thing consistent.
- Pick the right format. MP3 plays everywhere and keeps the file small. Choose WAV or FLAC if you plan to edit the joined file further.
- Check each part. Use the play button next to each file to make sure you have the right recordings in the right order before you press Join.
The finished file starts with the first file in the list and plays each file in turn, with no gaps added. The audio merger keeps the full length of every file you add.
More free audio tools
- MP3 Cutter: Cut MP3s and make ringtones
- Audio Trimmer: Trim WAV, M4A and other recordings
- MP3 Converter: Turn WAV, M4A or FLAC files into MP3
- Audio Converter: Convert between MP3, WAV, M4A, FLAC, OGG and OPUS
- MP4 to MP3 Converter: Get the sound from an MP4 video
- Video to MP3 Converter: Extract audio from MOV, WebM and MKV videos
Audio merger FAQ
Can I join files in different formats?
Yes. You can mix MP3, WAV, M4A, FLAC, OGG and others, and even the sound from videos. They are matched automatically.
How many files can I join?
As many as you like, as long as they add up to less than 150 MB on a phone or 500 MB on a computer.
Can I change the order after adding files?
Yes. Drag a file by its handle, or use the up and down arrows next to it.
Is the audio merger free?
Yes. No account, no watermark and no limit on use.
Are my files uploaded?
No. The files are joined in your browser on your own device. Nothing is uploaded or stored.
Before joining, you can trim each file with the audio trimmer, and afterwards even out the sound with the volume tool.
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