01
Add files
Click Add files or drop multiple tracks. Each becomes a clip on the timeline.
Audio Merger
Combine multiple tracks into one file. Reorder, trim, crossfade, then download — all in your browser.
Drop audio files here
or click to choose several files from your computer
MP3 · WAV · FLAC · AAC · M4A · OGG
Drag clip body to reorder · use × to remove · click a clip to select · playhead follows playback
Drop audio files or click Add files to start.
0.0 s
0 = hard cut between tracks
Shortcuts
Space Play / Pause
C Split
Delete Remove clip
Working…
Local processing in your browser · Files are not uploaded to our servers
What is the Audio Merger?
Audio Merger joins two or more files into a single continuous track. Drop in MP3, WAV, FLAC, AAC, M4A or OGG (or any mix of those formats), put the clips in the order you want, optionally add a short crossfade between them, then export one WAV file. Decoding, sequencing, and export all run in your browser — your audio is never uploaded to Sound Booster servers.
It works as a practical song merger for playlists, a podcast stitcher (intro + interview + outro), or a quick way to glue multiple takes into one deliverable without opening a DAW. Clips can be reordered by drag-and-drop, split at the playhead, or removed individually before you merge.
Crossfade blends the end of one clip into the start of the next (from a hard cut at 0 s up to a few seconds). When you are ready, Merge & Download renders the full timeline offline and saves a lossless WAV at the project sample rate. Convert further with the Audio Converter if you need MP3 or another format.
How it works
02
Arrange & preview
Reorder clips, split at the playhead, remove what you do not need. Play to hear the sequence.
03
Crossfade & export
Set crossfade (0 = hard cut). Click Merge & Download for a single WAV of the full timeline.
What you can do
Concatenate songs
Build one continuous file from a playlist or set of tracks.
Podcast segments
Stitch intro, interview, and outro into a single episode file.
Crossfade mixes
Smooth transitions between tracks (up to a few seconds) instead of hard cuts.
Mixed formats
Combine MP3, WAV, FLAC and more in one project — each file is decoded independently.
Frequently asked questions
How do I merge files?
Add two or more tracks, reorder them if needed, set a crossfade, then click Merge & Download. Each file becomes a clip on the timeline, so you can drag clips into the right order, remove any you do not need and play the sequence before exporting. The finished timeline is rendered into one continuous file.
Can I mix MP3 and WAV?
Yes. Each file is decoded on its own, then the timeline is rendered to one file, so MP3, WAV, FLAC, AAC, M4A and OGG can be combined in one project. If a file fails to load, convert it to WAV or MP3 first and add it again, since some unusual or protected files cannot be decoded in a browser.
What is crossfade?
It blends the end of one clip into the start of the next. Set 0 for a hard cut, which suits podcast segments or tracks that should stay separate. A short crossfade of a second or two gives smoother transitions between songs, while longer values create an obvious overlap where both tracks are audible together.
Is audio uploaded?
No. Merging runs entirely in your browser, from decoding and sequencing to rendering the final file. Your tracks are not sent to Sound Booster servers for this workflow, so playlists, interviews and unreleased material stay on your device while you arrange and export them.
Does order matter?
Yes — clips play in the list order. Drag to reorder before exporting, and press Play to hear the sequence from the start. If a transition sounds wrong, move the clip rather than adjusting everything else, and remember that the crossfade is applied between each neighbouring pair.
Can I split or trim a clip before merging?
Yes. Select a clip, move the playhead to the right spot, then use Split at the playhead, or press C, to cut it in two. You can delete any piece you do not want with the Delete key or the × on the clip. This lets you drop a long intro or a silent tail without opening a separate editor.
What crossfade length should I use?
It depends on the material. Use 0 seconds for spoken segments or tracks that should keep their natural gaps. A short fade of one to two seconds works well for songs in a playlist, and a longer one suits ambient music or DJ-style blends. Preview the join and shorten the fade if a beat or word gets cut.
How do I build a podcast episode from an intro, interview and outro?
Add the three files, drag them into the right order and set the crossfade to a very short value or 0 for clean transitions. Split off any false starts, remove them, and listen through once before exporting. If the interview is quieter than the intro music, level it with the Volume Booster first.
What if my tracks have very different volume levels?
The merger joins clips as they are, so a loud track followed by a quiet one will sound uneven. Before merging, adjust each file’s level with the Volume Booster, or fix tone problems with the Equalizer. A short crossfade does not solve loudness differences, so it is worth checking the transitions in the preview.
Is there a limit on how many files I can merge?
There is no fixed number set by the tool; the real limit is your device’s memory, because every file is decoded in the browser. A handful of songs is easy, but dozens of long, high-quality tracks may make the tab slow. For big projects, merge in groups and then combine the finished files.
Related tools
Keep editing with other browser-based tools on Sound Booster.