Audio Joiner & Concatenator
Merge multiple audio files into one track in your browser via Web Audio API. Crossfade support, no upload, free and private.
Loading tool...
What is Audio Joiner & Concatenator?
Audio Joiner & Concatenator merges multiple audio files into one track using the Web Audio API. Files are decoded locally, concatenated with optional crossfade, and exported as a downloadable WAV file - all in your browser with no upload.
Key Benefits
- Merge voice memos, podcast segments, and music tracks without software
- Crossfade smooths transitions between segments
- Files processed locally - recordings stay on your device
- No watermarks, time limits, or accounts
- Works on mobile and desktop browsers
Common Use Cases
- •Combining podcast episode segments into one file
- •Merging voice memos for a single recording
- •Creating DJ-style mixes with crossfade between songs
- •Concatenating audio clips for video production
How to Join Audio Files
- Add audio files: Select the audio files you want to join - they are decoded and added to the queue.
- Set crossfade: Optionally set a crossfade duration for smooth transitions between tracks.
- Join and download: Click join to merge the tracks, then download the combined WAV file.
Key Features
- Merges MP3, WAV, OGG, and WebM files into a single WAV track
- Adjustable crossfade duration for smooth transitions
- Reorder and remove tracks before joining
- Processes entirely via Web Audio API - no upload needed
- One-click WAV download after joining
- Works on any device with a modern browser