Online Ruler vs ping123

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 ping123
Detail	Online Ruler	ping123
What it does	Free on-screen measuring tools that run in your browser	IP information lookup and network risk detection tool
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	Public IP lookup and display Location, ISP, and ASN information Native vs datacenter IP detection Proxy, VPN, and Tor detection AI app access risk checking WebRTC leak detection DNS leak testing System and browser fingerprinting Command line API access Multi-language support
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	Runs on Cloudflare Workers with no dedicated servers or databases Browser-side detection computed only on user's device Multiple data sources including Cloudflare edge network API endpoint for programmatic access
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	2 no change since last check
Trust Flow (Majestic)	2	1
Citation Flow (Majestic)	18	18
Referring domains (Majestic)	10	5

4 details filled in for both companies.

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