PdfRuler: Online PDF Ruler & Measurement Tool

PdfRuler is a free online PDF ruler. Open any PDF in your browser and measure it in millimetres, centimetres, inches, points or pixels, with accurate rulers, exact X/Y cursor coordinates and page dimensions. Your file never leaves your device.

Features

• Physical-unit rulers: mm, cm, in, pt, px
• Exact cursor X/Y position and page width/height
• Zoom-independent, accurate measurements
• Grid overlay and rulers on all four sides
• Private: runs 100% client-side, no upload, no account

How to measure a PDF online

1. Drag and drop your PDF, or click Open PDF.
2. Choose your unit (mm, cm, inches, points or pixels).
3. Hover over the page to read exact coordinates; read page size from the rulers.

Use cases

Check print sizes and margins, verify A4 / Letter page dimensions, measure artwork and layouts, inspect technical drawings, and get exact PDF coordinates for design and development work.