CSS Specificity Calculator
calculate and compare CSS selector specificity scores
The CSS Specificity Calculator on DevLab lets you calculate and compare CSS selector specificity scores directly in your browser — no installation, no signup, no limits. Debug why a CSS rule is not applying. Works on all devices and supports keyboard shortcuts for power users.
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What is CSS Specificity Calculator?
Calculate CSS selector specificity scores instantly. Understand why one rule overrides another by comparing specificity values of any CSS selectors you enter.
Developers use CSS Specificity Calculatordaily to save time and avoid errors. Instead of writing custom code or searching through documentation, you can get immediate results with a simple paste-and-process workflow. DevLab's CSS Specificity Calculator is optimized for speed — results appear as you type with no button clicks required.
All processing happens entirely in your browser using modern JavaScript APIs. This means your data never leaves your machine, making it safe to use with sensitive content like tokens, API keys, or private documents.