mp3
The most compatible choice for music, voice notes, podcasts, and sharing.
Browser-based processing
Audio Merger
Join MP3, WAV, M4A, AAC, FLAC, OGG, or Opus files in your chosen order and export one polished audio file.
No uploadReorder tracks6 output formats
01
Add your tracks
Drop or browse multiple files
02
Arrange the playback order
Use buttons or drag and drop
03
Choose an output and download
Process in a Worker and preview
Add your tracks
Drop audio files here or click to browse
Add at least 2 audio files · up to 500 MB each
Files stay on this device and are processed in a Web Worker.
Audio merging guide
Supported formats for audio merging
Combine common compressed and lossless audio files in one browser workflow. The output is normalized to a consistent sample rate and channel layout so tracks play smoothly from start to finish.
wav
Uncompressed PCM output for editing and production workflows.
m4a
AAC in an MP4 container for phones, video editors, and Apple devices.
flac
Lossless output for archiving and continued audio work.
ogg
An open container suited to web and open-source projects.
opus
Efficient voice and streaming audio with good quality at small sizes.
How to merge audio files online
The complete workflow takes place locally in your browser, with the order and output settings visible before you start.
- 01
Add two or more files
Drop MP3, WAV, M4A, AAC, FLAC, OGG, or Opus files into the uploader.
- 02
Set the order
Use the arrow buttons or drag a track to decide which file plays first, second, and next.
- 03
Choose output settings
Pick MP3 for compatibility, WAV or FLAC for editing, or M4A and Opus for efficient sharing.
- 04
Merge and download
MediaBunny decodes, joins, and encodes the tracks inside a dedicated Web Worker, then you can preview and download the result.
Common reasons to merge audio
Joining files is useful whenever several recordings, music sections, or sound effects need to become one continuous track.
Combine songs or stems
Join an intro, chorus, interlude, or separate stems into one shareable audio file.
Assemble a podcast episode
Place an intro, conversation, ad break, and outro in the correct sequence before publishing.
Create a voice compilation
Turn multiple voice memos, lessons, interviews, or language exercises into one file.
Prepare audio for video
Combine narration, background music, and sound effects before importing them into a video editor.
Private by design
Your files never leave this device. MediaKit uses MediaBunny, WebCodecs, and a Web Worker to decode and encode locally; no source audio is uploaded or stored on a server. The per-file limit is 500MB.
FAQ
Frequently asked questions
Which audio formats can I merge?
You can merge MP3, WAV, M4A, AAC, FLAC, OGG, and Opus files. The browser must be able to decode the specific codec inside the file.
Can I change the playback order?
Yes. Move tracks with the up and down buttons or drag them into a new position before merging.
Will the audio quality change?
The tracks are decoded and re-encoded into the selected output. Choose WAV or FLAC to avoid lossy output, or use a higher MP3/M4A bitrate for sharing.
Can I merge files with different sample rates?
Yes. MediaBunny resamples and remixes tracks to one consistent layout during the Worker-based export.
Does it work on mobile?
Yes, on a current browser. Large files may take longer on phones because decoding and encoding use local device resources.
Is there an upload limit?
Each file can be up to 500MB. The total practical limit also depends on available memory and the duration of the audio.
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