📖 How to Use MP3 Merger
- Click "Select MP3 Files" or drag and drop multiple MP3 files (minimum 2 files)
- Files will be displayed in the order selected. Drag and drop to reorder them
- Review the file list and total statistics before merging
- Click "Merge MP3 Files" to start the instant merging process
- Wait a few seconds for processing to complete
- Click "Download merged.mp3" to save the result to your device
✨ Key Features
🔒 100% Privacy
All processing happens in your browser using Web Audio API. Files never leave your device.
⚡ Ultra Fast
Instant processing with no external downloads. No need to wait for FFmpeg WASM to load.
🎯 High Quality
Uses native browser audio processing to maintain high quality output.
📁 Multiple Files
Merge unlimited MP3 files in a single operation. No restrictions on file count.
🎨 Drag & Drop
Intuitive interface with drag-and-drop support for easy file reordering.
💯 Free Forever
Completely free with no watermarks, no file limits, and no hidden costs.
⚠️ Important Notes
- Browser Support: Requires a modern browser with Web Audio API support (Chrome, Edge, Firefox, Safari).
- No Download Required: Uses native browser APIs - no external libraries to download.
- File Size: Works with any file size, but very large files may take longer to process.
- Offline Capable: Once the page loads, you can merge files completely offline.
- File Format: Supports MP3 files. Output is always in MP3 format.
🔧 Technical Details
- Processing Method: Web Audio API concatenation
- Output Format: MP3 (audio/mpeg)
- Quality: High quality audio processing
- Supported Formats: MP3 input and output
- Framework: Pure JavaScript with Web Audio API