Skip to main content

Built by makers, shipped in public

Sign in

ScreenSize.net vs Online Ruler

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

ScreenSize.net compared with Online Ruler
DetailScreenSize.net logo ScreenSize.netOnline Ruler logo Online Ruler
What it doesLive screen size checker and display comparison tools Measure anything on your screen with pixel-perfect accuracy
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Free
PricingNot given Not given
Key features
  • Live browser screen dimension detection
  • Physical screen measurement in inches
  • Screen comparison tool with size visualization
  • PPI and aspect ratio calculators
  • Source-backed device specification charts
  • Device pixel ratio detection
  • TV size calculator
  • Online ruler tool
  • Manufacturer-sourced device database
  • Smart Auto-Detect identifies your device from a database of 100+ profiles
  • Three calibration methods: auto-detect, screen diagonal, and credit card
  • Place rulers on any edge of the screen in any combination
  • Click-to-measure distances in any direction
  • Live cursor position tracking
  • Dark mode with automatic system preference detection
  • Support for four measurement units: cm, mm, inches, and pixels
What makes it different
  • Local browser processing with no personal data storage
  • Manufacturer-verified device specifications
  • Comprehensive screen measurement for design and development
  • True-size visual comparison without subjective estimates
  • Distinction between CSS pixels, viewport, and native resolution
  • No installation required—runs entirely in your web browser
  • Achieves near pixel-perfect accuracy typically within 0.5mm for well-calibrated screens
  • Completely free with no ads, account, or limitations
  • Calibration saved locally so no need to recalibrate on each visit
  • Works on tablets and mobile devices with touchscreen support
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)26 +1 (up) since last check4 +3 (up) since last check
Trust Flow (Majestic)40
Citation Flow (Majestic)3117
Referring domains (Majestic)1414

4 details filled in for both companies.

More alternatives to ScreenSize.net More alternatives to Online Ruler

Ask us