Audio Merger
Merge multiple audio files into one. Add tracks, trim selection, reorder, and export as WAV or MP3.
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What is this tool?
An Audio Merger lets you combine multiple audio files into a single output. Add as many tracks as needed, trim selection range on each track using an interactive waveform, reorder tracks with drag handles, preview individual segments, and export the merged result as WAV or MP3. All processing happens client-side in your browser.
When to use this tool
Combine podcast segments
Record podcast segments separately, then merge them into a single polished episode with the right order and trimmed intros.
Create compilations
Combine multiple song clips, sound effects, or music excerpts into a single compilation file for personal use or presentations.
Assemble voice-over tracks
Record multiple voice-over takes, then merge the best takes in sequence into a complete narration track.
Build audio presentations
Merge spoken narration with music beds, sound effects, and transitions to create audio presentations or training materials.
How to use
- 1
Upload audio files
Click or drag-and-drop one or more audio files. Each file becomes a separate track. Supports MP3, WAV, OGG, AAC, and M4A.
- 2
Adjust track selections
Each track displays a waveform with draggable start and end handles. Drag the handles to select the portion of each track you want to include in the final merge.
- 3
Reorder tracks
Use the up and down arrow buttons on each track to reorder them. The final output concatenates all tracks from top to bottom.
- 4
Merge and export
Choose WAV for uncompressed quality or MP3 for smaller file size, then click Merge & Save. The merged audio combines all selected segments in order.
Frequently Asked Questions
What audio formats can I merge?
You can upload MP3, WAV, OGG, AAC, and M4A files. Each track can be a different format โ they are all decoded to raw audio before merging. The output can be WAV (uncompressed) or MP3 (compressed, smaller file size).
Is there a limit to how many tracks I can merge?
There is no hard limit on the number of tracks. However, processing many tracks or very long audio files requires browser memory. For best results, keep the total merged duration under 30 minutes and use fewer than 20 tracks.
Can I merge audio files with different sample rates?
Yes. The merger automatically normalizes all tracks to the same sample rate (using the sample rate of the first track) before concatenating them. This ensures consistent playback quality across the merged output.
What is the difference between WAV and MP3 output?
WAV is an uncompressed format that preserves full audio quality but produces larger files. MP3 uses lossy compression to achieve smaller file sizes at the cost of some quality. For archiving or further editing, choose WAV. For sharing or space-constrained use, choose MP3.
Is my audio data uploaded to a server?
No. All audio processing โ decoding, trimming, and merging โ happens entirely in your browser using the Web Audio API. Your files never leave your device. This means your audio data is completely private and secure.
What is audio merging?
Audio merging (or concatenation) joins multiple audio files into a single continuous track, playing one after another in the order you arrange. Unlike mixing, which overlays tracks simultaneously, merging keeps every part intact and simply chains them together. It is useful for compiling playlists, joining podcast segments, or assembling chapters.