Ruler — Measure Pixel Distance

About

Ruler measures the exact pixel distance — and the X and Y offset — between any two points on a web page.

📏 TWO CLICKS
Click the toolbar icon, click point A, then click point B. A crosshair overlay follows your cursor and shows the live dx, dy, and straight-line distance as you move.

📋 AUTO-COPIED
The moment you lock the second point, the result — start and end coordinates plus dx and dy — is copied to your clipboard, ready to paste into your code, notes, or a bug report.

🎯 BUILT FOR PRECISION WORK
Perfect for front-end developers, designers, and QA: line things up, check spacing, measure offsets for absolute positioning, or grab coordinates for automation scripts.

🔒 PRIVATE & LIGHT
• Only activeTab + scripting + clipboardWrite — it runs on a page only when you click to measure.
• No host permissions, no "read your data on all sites".
• No accounts, no tracking, no ads. Nothing is uploaded.

Press ESC anytime to cancel. Free.