How to use the Audio Cutter tool
- Select your fileClick “Choose File” or drop it into the box above. Nothing is uploaded — the file is opened locally by your browser.
- Adjust visuallyPlay the preview and set the start and end points with the buttons or by typing the seconds.
- Click “Cut audio”Processing takes a few seconds. When it is done, download your file — or all results as a single ZIP.
Why use ConvertMathly?
Files are processed on your device and never uploaded. Close the tab and they are gone.
No account, no daily cap, no queue and no watermark — convert as much as you want.
The same engine used by professional video tools, running in your browser via WebAssembly.
Windows, Mac, Linux, Chromebook, iPhone and Android — any modern browser, nothing to install.
Frequently asked questions
Is Audio Cutter free?
Yes. Audio Cutter is free to use as often as you like — no sign-up, no watermark and no file limits.
Are my files uploaded?
No. ConvertMathly processes files directly in your browser, so they never leave your device. This is safer than tools that upload documents to a server.
Why does the first run take longer?
A one-time download of the video engine (~30 MB) happens on first use and is cached afterwards.
Does it work on mobile?
Yes — on iPhone, iPad, Android, Windows, Mac, Linux and Chromebook, in any modern browser.