About EZ Virtual Tools

EZ Virtual Tools is a comprehensive engineering calculator platform spanning 45 industries. Every calculation runs locally in your browser — no signup, no tracking by default, fully installable as an offline-capable app.

Coverage

The platform spans these 45 industries:

• Engineering core: Mechanical, Electrical, HVAC, Plumbing, Hydraulics, Construction, Solar, Welding, Fire Protection, Marine
• Specialty: Petroleum, Automotive, Aviation, Networking, Telecom, Data Center, Refrigeration, Elevator
• Trades: Roofing, Flooring, Cleaning, Landscaping, Pool & Spa, Catering, Packaging, Printing, Textiles, Woodworking
• Services: Accounting, Insurance, Real Estate, Medical, Pharmacy, Veterinary, Fitness, Photography, Audio
• Industrial: Agriculture, Mining, Brewing, Trucking, Water Treatment
• Analytical: Probability, Surveying, Security

How It Works

Each calculator is defined by a JSON schema describing its inputs, outputs, and verification cases. A pure JavaScript engine computes the result. The platform validates outputs against known cases on every deploy, so accuracy stays measurable.

Calculators are available in two forms:

• Individual-HTML: self-contained /calc/X.html pages with inlined CSS/JS
• Schema-driven: /calc/calculator.html?id=X renders from JSON def + engine dynamically

What's Free

Everything. Every calculator, every encyclopedia term, every workflow. No accounts, no paywalls, no premium tier. The platform is funded by the maintainers as a community resource.

Privacy-First

Calculator inputs never leave your browser. Analytics is opt-in via the consent banner. Pages work fully offline once visited (PWA cache).

Open Standards

Uses HTML5, CSS3, vanilla ES2020+ JavaScript, Schema.org JSON-LD, PWA manifest, OpenSearch, Web App Manifest. No frameworks, no build step.

Contact

• General: hello@ezvirtualtools.com
• Security: security@ezvirtualtools.com (see security policy)
• Privacy: privacy@ezvirtualtools.com (see privacy policy)
• Legal: legal@ezvirtualtools.com (see terms)

Last updated: 2026-05-27

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