How to merge audio files
Drop two or more audio files into the box above, or click Choose files. MP3, M4A, WAV, OGG, FLAC and MP4 videos all work.
Put them in order with the arrows next to each file. The MP3 plays them from top to bottom.
Pick a bitrate and click Merge audio.
Download the merged MP3.
Why merge audio files?
Lectures, interviews and podcasts are often recorded in parts, and voice messages arrive one by one. A single file is easier to listen to, share and archive than a folder of pieces.
Joining a few songs into one track is handy for a workout, a party, a slideshow or a car without a playlist feature.
What the merged MP3 is like
Every file is decoded and re-encoded into one MP3 at 44.1 kHz stereo, whatever it was before. Mono recordings play on both sides; files with different sample rates are resampled so they follow each other seamlessly.
The files are joined directly, with no gap and no crossfade. MP3 encoding is lossy, so choose 192 kbps or more for music you care about.
Is it safe?
Yes. Merge MP3 runs entirely in your browser. Your files are read and converted by your own device using built-in browser technology, so they are never uploaded to a server and nobody else can see them.
You can check this yourself: open your browser's developer tools, switch to the Network tab and convert a file. No upload requests are made.
Audio is decoded and encoded by your browser, with its built-in media engine and a WebAssembly MP3 encoder. Nothing is uploaded.
Files stay in this tab's memory only until you remove them or close the page.
Frequently Asked Questions
Can I merge different formats together?
Yes. MP3, M4A, WAV, OGG, FLAC and the sound of MP4 videos can all go into the same merge, in any order.
Is there a gap between the files?
No. Each file starts right where the previous one ends. To leave a pause, add a short silent file between them.
Can I cut the files before merging?
Yes: trim each one with the MP3 Cutter first, then merge the cut files here.
Which bitrate should I choose?
192 kbps sounds like the original to most listeners. 128 kbps is plenty for speech and halves the size; 320 kbps is the highest MP3 allows.
How many files can I merge?
Up to 500 files, each up to 500 MB. Files are read from disk in pieces, so long recordings don't need to fit in memory.