Squints

Squints is a free Chrome extension that adds design inspection tools directly on live web pages. It offers features such as measuring spacing, dragging rulers and guides, overlaying column grids, color picking with color token info, identifying rendered fonts with metrics, and controlling animation speed including slow motion and scrubbing. It supports annotation with arrows, boxes, and notes, and allows capturing screenshots or recordings with or without marks. It is designed for design engineers to make design decisions directly in the browser.