Merge Audio Files
Combine multiple songs, voice notes, and audio clips into a single continuous track. Processed entirely inside your browser for ultimate privacy.
Select Audio Files
Select multiple files or drag & drop them here
Processed securely on your device. Files never touch our servers.
Track Order
Use the up/down arrows to arrange the files in the order they should play.
If the engine fails to load, verify your site has an SSL certificate (HTTPS) and Cross-Origin headers are enabled in your .htaccess file.
Merging Audio...
Processing locally...Final file will be exported as a high-quality MP3.
How to Merge Audio Files Online
Seamlessly stitch multiple voice recordings, podcast segments, or songs together. Follow these three steps to combine audio in your browser.
Select Your Files
Choose two or more MP3, WAV, M4A, or OGG files. You can even mix and match different audio formats without any issues.
Arrange the Order
Use the simple up and down arrows to place your audio tracks in the exact sequence you want them to play back.
Merge & Download
Click merge. Our local engine seamlessly glues the tracks together into a single, high-quality MP3 file ready for immediate download.
Features of Our Audio Joiner
Cross-Format Compatibility
Don't worry if your intro is an M4A, the main track is an MP3, and the outro is a WAV. Our engine intelligently harmonizes and merges mixed formats flawlessly.
100% Private (No Uploads)
We use WebAssembly technology to combine your files directly inside your browser. Your private recordings and podcast drafts never leave your personal device.
Easy Reordering
Uploaded files out of order? No problem. The built-in list manager lets you easily shift tracks up or down to create the perfect playlist sequence before combining.
Lightning Fast Execution
Since you aren't waiting to upload a dozen large audio files to a remote server, the entire merging process happens incredibly fast using your local hardware.
Frequently Asked Questions
Yes, it is entirely private. Toolszu uses modern WebAssembly to process all the audio files directly within your browser's memory. The files are never uploaded, making it 100% safe for personal and confidential voice recordings.
You can merge as many files as you want, provided the total combined file size of all tracks does not exceed 200MB. This limit ensures your web browser doesn't crash during the local encoding process.
Our engine stitches the files together end-to-end seamlessly. There will be no artificial gaps added between the tracks. However, if your original files contain silent space at the end, that silence will be included.
To ensure maximum compatibility across all devices, music players, and phones, the final merged track is automatically exported as a high-quality MP3 file.
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