Add multiple audio files
Select several files or drop them into the editor, and add more as needed. Common imports include MP3, WAV, M4A, AAC, FLAC and OGG; decoding depends on your browser's codec support.
Audio Joiner
Join your audio. In the right order.
0 clipsDrag to reorder · plays from top to bottom
Drop your audio files here
Add two or more files, arrange them, and make one continuous track.
Supported formats: MP3 · WAV · M4A · AAC · FLAC · OGGMerged previewTotal 00:00.000
Your merged sequence will appear here
Play clips in order, without gaps
All audio processing stays in your browser.
Join audio online, in the order you choose
Zolkit Audio Joiner, also called an Audio Merger, combines two or more audio files sequentially in your browser. Arrange clips, trim each one, add crossfades, then preview and export a single new file. Use it for podcast chapters, separate recordings, interview excerpts or music clips while keeping the originals unchanged.
Drag clips into playback order
Clips are joined from top to bottom. Drag the reorder handles or use the move-up and move-down buttons. The combined timeline reflects the new sequence.
Trim each clip independently
Drag the waveform handles or enter start and end times in seconds in the Trim clip panel. Only the selected interval is included, so you do not need to export separate trimmed files first.
Smooth joins with crossfades
Leave crossfade off for a direct join, or overlap adjacent ends with a gradual volume transition. The timeline marks overlaps, and short clips automatically limit their length.
Preview the complete sequence
Click the combined timeline to seek, play, pause or return to the start. Preview and export use the same merged result, including order, trimming and crossfades.
Local processing, seven export formats
Audio content does not need to be uploaded to a server. MP3 is the default, with WAV, M4A, AAC, M4R, FLAC and OGG also available. Bitrate settings appear only for supported formats.
How to merge two or more audio files
Choose audio files or drop several files into the editor. Each loaded clip shows its name, duration and waveform. Use Add audio to include more files.
Drag clips into order or use the up and down buttons. Select a clip and drag its waveform handles, or enter the interval to keep in Trim clip.
Open Crossfade and choose Off or a duration. Seek and play from the combined timeline to check the order, cut points and transitions.
Choose Export at the top right, pick a format and an available bitrate, then export the merged audio. The new download includes your settings without overwriting the originals.
Which format should you use for merged audio?
| Format | When to use it |
|---|---|
| MP3 | The default for common players, sharing and manageable file sizes, with selectable bitrates. Re-encoding to MP3 uses lossy compression. |
| WAV / FLAC | WAV stores uncompressed PCM; FLAC losslessly compresses the processed result. Useful for further editing or archiving, but neither restores information already lost in the source. |
| M4A / AAC / OGG | Compressed options for supported devices and apps. Choose according to the destination's format support and select an available bitrate. |
| M4R | For preparing compatible ringtone files. Follow the destination device or app's requirements for importing and permitted ringtone length. |
Audio joining questions
What is the difference between an Audio Joiner and an Audio Merger? Can I overlay whole tracks?
Both names commonly describe combining multiple audio files into one. This tool joins them sequentially. Only adjacent ends overlap briefly when crossfade is enabled; it is not a mixer for playing multiple complete tracks at once.
What can I use an audio joiner for?
Combine a podcast intro, main section and outro, assemble separately recorded narration or voice clips, or arrange interview and music excerpts in order. Direct joining adds no extra gap, but any silence already present in the source remains.
Can I combine different formats, sample rates and channel counts?
You can mix common formats such as MP3, WAV, M4A, AAC, FLAC and OGG if the browser can decode them. Audio is normalized to 44.1 kHz, multichannel audio is downmixed to stereo, and mono and stereo clips can be combined. Unreadable files are identified while successful imports are kept.
Why does crossfade reduce the total duration?
A crossfade overlaps one clip's end with the next clip's beginning. Two clips of 10 and 8 seconds with a 0.5-second overlap produce 17.5 seconds. Choose Off or presets from 0.25–5 seconds. Each overlap is capped at half the length of either neighbour; check the displayed total and overlap duration.
Can I trim clips first and undo mistakes?
Yes. Set a separate interval for each clip without trimming all other clips. Restore a full clip or use undo and redo for edits such as order and trimming. Removing a clip from the list does not delete its original file from your computer.
Does merging preserve the original audio quality?
The tool decodes, processes and re-exports audio rather than directly concatenating the original compressed data. WAV and FLAC avoid an additional lossy encoding of the processed result. MP3, M4A, AAC, M4R and OGG use lossy encoding. A lossless output cannot improve the quality already present in the source.
Is my audio uploaded, and are edits saved after closing the page?
Decoding, merging, preview and export happen in the current browser without uploading audio content to a server. Edits exist only in the current page session. Export what you need before clearing, closing or refreshing the page. The original files are not overwritten.
Can I merge audio on a phone, and how large can files be?
The layout adapts to phones with touch trimming and up/down buttons for ordering. Capacity depends on device memory and browser performance, so unlimited file sizes are not promised. A computer is preferable for long recordings or many clips; try shorter or fewer files if processing fails.