Last updated: 28 June 2026
Specter ("the extension") is a design-QA inspector that lets you hover or pin any element on a web page to see its box model, spacing, typography, colours, WCAG contrast, borders, and flex/grid layout, and to compare those values against your own design tokens.
Specter does not collect, store, transmit, or sell any personal data. Everything the extension does happens locally, in your browser, on your device. There are no analytics, no tracking, no accounts, and no external servers.