What is CSS Selector Builder?

Compose complex CSS selectors with specificity analysis.

Is CSS Selector Builder free to use?

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

No — CSS Selector Builder 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 Selector Builder?: Compose complex CSS selectors with specificity analysis.
Is CSS Selector Builder free to use?: Yes — CSS Selector Builder is free to use, with no sign-up, no install and no account.
Does CSS Selector Builder upload or store my data?: No — CSS Selector Builder runs entirely in your browser, so your text, files and results never leave your device.
Do I need to install anything to use CSS Selector Builder?: No — it works in any modern browser (Chrome, Edge, Firefox, Safari) with no downloads, accounts or plugins.