Audio Merger & Joiner is a free, browser-based tool that joins multiple audio clips into one file. Works best when all clips share the same format. It uses ffmpeg compiled to WebAssembly, so your audio never leaves your device.
How to use the Audio Merger & Joiner
- Select two or more audio files, ideally the same format.
- Click Merge audio.
- Download the combined audio file once processing finishes.
Why use FreeToolsNets's Audio Merger & Joiner?
- 100% free, with no usage limits and no account required.
- Everything runs locally in your browser — nothing you type is uploaded or stored on a server.
- Works on desktop, tablet and mobile in any modern browser.
- No installation, no plugins, and no ads blocking the tool itself.
Frequently asked questions
Can I merge MP3 and WAV together?
Mixed formats may fail with this fast stream-copy merge method \u2014 for best results, use clips that already share the same format.
Is my audio uploaded to a server?
No \u2014 merging happens locally in your browser using WebAssembly.
Is this tool free to use?
Yes, completely free on FreeToolsNets, with no sign-up and no limits.
Is my data sent to a server?
No. Everything runs locally in your browser using JavaScript — nothing you enter is uploaded anywhere.
Does it work on mobile?
Yes, the widget is fully responsive and works on phones, tablets and desktops.