Audio Cutter & Trimmer is a free, browser-based tool for cutting a clip out of an audio file. It uses ffmpeg compiled to WebAssembly, so your audio never leaves your device — the first use downloads a one-time ~30MB engine.
How to use the Audio Cutter & Trimmer
- Upload an audio file.
- Set the start time and how many seconds to keep.
- Click Trim audio \u2014 the first use downloads the processing engine (~30MB), cached afterward.
- Download your trimmed clip once processing finishes.
Why use FreeToolsNets's Audio Cutter & Trimmer?
- 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
Why does the first run take longer?
The browser downloads a one-time WebAssembly audio/video engine (~30MB); your browser caches it, so later uses on this device start faster.
Is my audio uploaded to a server?
No \u2014 all trimming 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.