RulerFlow – Page Ruler

Measure webpage areas in pixels with a private, lightweight ruler, grid, coordinates, and keyboard fine-tuning.

RulerFlow makes pixel-perfect webpage measurement quick and distraction-free. Click the toolbar icon, drag across any part of a webpage, and see the width, height, top-left coordinates, and bottom-right coordinates update instantly. Use the arrow keys for one-pixel adjustments or hold Shift for ten-pixel steps. Highlights: • 50 × 50 pixel page grid • Live width, height, and boundary coordinates • Mouse, touch, and pen support • Copy, clear, and keyboard fine-tuning • English and Simplified Chinese interface • No analytics, accounts, advertisements, or remote code Every measurement feature is free. Optional support opens a Creem-hosted page only when you click the support button.