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White Screen Light 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.

White Screen Light compared with Online Ruler
DetailWhite Screen Light logo White Screen LightOnline Ruler logo Online Ruler
What it doesFree online tool to turn your display into a bright white screen for lighting, testing, and tracing 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
  • Full screen bright white light (#FFFFFF)
  • Adjustable brightness controls
  • Display dead pixel test
  • Webcam fill light and softbox
  • Screen cleaning background
  • Custom color presets and hex code input
  • Strobe and flicker effects
  • Soft white light mode
  • 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
  • Requires no installation or registration, runs entirely in browser
  • Zero tracking or data collection
  • Works on all devices and operating systems
  • Loads in milliseconds with no ads or popups
  • Dynamically adapts to any viewport with vector-sharp rendering
  • 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)Not checked yet no change since last check1 no change since last check
Trust Flow (Majestic)10
Citation Flow (Majestic)2017
Referring domains (Majestic)124

4 details filled in for both companies.

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