What is CSS Units Converter?

Convert between px, rem, em and % using a root font size.

Is CSS Units Converter free to use?

Yes — CSS Units Converter is free to use, with no sign-up, no install and no account.

No — CSS Units Converter runs entirely in your browser, so your text, files and results never leave your device.

No — it works in any modern browser (Chrome, Edge, Firefox, Safari) with no downloads, accounts or plugins.

What is CSS Units Converter?: Convert between px, rem, em and % using a root font size.
Is CSS Units Converter free to use?: Yes — CSS Units Converter is free to use, with no sign-up, no install and no account.
Does CSS Units Converter upload or store my data?: No — CSS Units Converter runs entirely in your browser, so your text, files and results never leave your device.
Do I need to install anything to use CSS Units Converter?: No — it works in any modern browser (Chrome, Edge, Firefox, Safari) with no downloads, accounts or plugins.