A responsive on-screen ruler for measuring elements and images. Switch between pixels, centimetres, millimetres and inches, and calibrate for your display.
A responsive on-screen ruler for measuring elements and images. Switch between pixels, centimetres, millimetres and inches, and calibrate for your display.
The Online Screen Ruler is part of TechToolsCenter — a free, privacy-first collection of 65+ online tools. Like every tool here, it runs 100% in your browser, so your data stays private and results are instant. There is no sign-up, no watermark and no limit on how many times you can use it.
Open the Online Screen Ruler — it loads instantly and works entirely in your browser. No sign-up or installation is needed.
Fill in the fields or paste your content. Everything updates in real time so you always see an accurate live preview.
Check the result in the preview panel. Use Undo, Redo or Reset at any time — your work is saved to your browser automatically.
When you're happy, copy the result, download the file, or share it. Nothing is ever uploaded to a server — it all stays on your device.
Pixels, centimetres, millimetres and inches, with a calibration option for accuracy.