Website Conversion & Performance Calculators
Deterministic diagnostics for founders, growth marketers, and engineering teams. No signup, no tracking cookies, and instant results.
Headline Cognitive Load & Scanning Speed Calculator
Measure reading time, syllables, and above-the-fold bounce risk in milliseconds.
Google SERP Snippet & Pixel Width Simulator
Calculate exact canvas pixel width for Google title and meta description cutoffs.
Reading Time & Mobile Scroll Fatigue Estimator
Calculate reading duration and mobile viewport swipe depth before users bounce.
WCAG 2.1 Color Contrast Ratio & APCA Preview
Mathematically exact relative luminance calculation for WCAG AA, AAA, and UI components.
LLM Context Window & Token Cost Estimator
Estimate token volume, signal-to-noise ratio, and scraping costs for AI agents.
AEO Structural Markup & Rich Results Checker
Validate JSON-LD structured data for Google Rich Results and autonomous AI discovery.
Audit Your Live Website in 10 Seconds
Get an instant above-the-fold hero teardown, cognitive friction diagnostics, button contrast verification, and HTML issue checks directly on your live page.