Online Ruler vs BlankScreen

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

Online Ruler compared with BlankScreen
Detail	Online Ruler	BlankScreen
What it does	Free on-screen measuring tools that run in your browser	Free fullscreen color screens and display tools in your browser
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	Actual-size ruler in cm, mm and inches Bank-card and screen-diagonal calibration Top, left and right rulers with drag-to-measure readout Full-screen mode and browser-zoom warning Image measurement tool Length unit converter Touch dragging support for phones and tablets Local storage of calibration without server uploads	Fullscreen mode with one click Download backgrounds as PNG in multiple resolutions Works on any device without installation
What makes it different	Calibration step compensates for browsers' inability to detect physical display size ISO/IEC 7810 ID-1 standard bank card calibration ensures reproducible accuracy All calculations run locally in your browser with no data sent to servers Works on any device with a browser and JavaScript enabled Content follows standards-based principles with no invented precision or fake reviews	No download or signup required, loads in under a second Works as a soft light source for webcam fill light Serves as a professional light table for tracing artwork Detects monitor issues including dead pixels and backlight dimming All tools run in browser with nothing uploaded or stored
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	35 −3 (down) since last check
Trust Flow (Majestic)	2	7
Citation Flow (Majestic)	18	24
Referring domains (Majestic)	10	22

4 details filled in for both companies.

More alternatives to Online Ruler More alternatives to BlankScreen