Audio Merger
Merge multiple audio files into one online for free. Combine MP3, WAV, AAC files. Reorder tracks easily. No upload required - process locally.
Free audio merger. Combine MP3, WAV, AAC files into one. Drag to reorder, optional crossfade transitions. 100% browser-based processing.
- ✓ Merge MP3, WAV, AAC, OGG, and M4A files
- ✓ Drag-and-drop reordering of tracks
- ✓ Optional crossfade between tracks
- ✓ Choose output format and quality
- ✓ 100% client-side - files never leave your device
How to Merge Audio Files
- 1 Upload two or more audio files by clicking or dragging them
- 2 Drag and drop to reorder the files in your preferred sequence
- 3 Choose the output format and optional crossfade duration
- 4 Click 'Merge Audio Files' to combine them into one file
- 5 Download your merged audio file
Frequently Asked Questions
How does browser-based video processing work? ▼
MagicKit uses FFmpeg compiled to WebAssembly (WASM). This brings professional video editing capabilities directly to your browser.
What video formats are supported? ▼
MP4, WebM, MOV, and AVI. Some tools also support MKV and other formats.
Is there a file size limit for videos? ▼
We recommend files under 500MB for optimal browser performance. Larger files will work but may be slower.
Why does video processing take time? ▼
Video encoding is computationally intensive. Processing happens on your device, so speed depends on your computer's capabilities.
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Last updated: January 15, 2026 · v2.1