Modern Platform for Comprehensive Website Diagnostics and SEO Auditing
WebDiag brings together over 125 analytical tools, in-depth technical audits, and intelligent AI scenarios into a single ecosystem for webmasters, SEO professionals, and developers.
Our Mission
Making professional web diagnostics and technical SEO accessible, fast, and actionable for every website owner.
Most legacy SEO suites are weighed down with complex interfaces, opaque grading systems, or expensive paywalls for basic tests like robots.txt or SSL headers. We built WebDiag as a clean, single pane of glass for all technical diagnostics.
We believe a fast, secure website is the foundation of any digital business. That is why core utilities are always freely accessible, and complex multi-page audits come with actionable, step-by-step remediation advice.
WebDiag Standards
- Strict adherence to Google Search Central and Yandex Webmaster guidelines
- Realistic Core Web Vitals (LCP, INP, CLS) based on actual page loads
- Compliance with W3C, RFC, and Schema.org structured data specs
- No spam, intrusive ad overlays, or hidden paywalls
Why Choose WebDiag
Four foundational principles guiding everything we build.
Lightning speed & depth
Instant evaluation of HTTP headers, security policies, canonical tags, and full JavaScript client-side rendering via modern Chromium.
Action-oriented AI tools
Our AI assistants do not invent hallucinated recommendations; they work strictly from confirmed audit evidence to structure practical fix plans.
Privacy & security first
We collect only what is strictly required to run your checks, never sell user data, and ensure project isolation across all workspaces.
All-in-one ecosystem
No more switching between a dozen separate websites to validate JSON-LD, test DNS records, verify Core Web Vitals, and generate metadata.
Technology Stack
Engineered on modern web standards and reliable infrastructure.
Modern Frontend
Next.js 16, React 19, and strictly typed TypeScript for instant navigation and responsive interfaces.
High-Performance Backend
Asynchronous Python 3.14 and FastAPI with worker queues for parallel execution of heavy website crawls.
Real Browser Rendering
Headless Chromium accurately mimics Googlebot and modern browser rendering engines.
Robust Infrastructure
Containerized deployments and continuous uptime monitoring for uninterrupted reliability.
Ready to inspect your website today?
Run a free single-page SEO audit or choose an exact utility from our comprehensive tools catalog.
Have questions or ideas?
Our team welcomes your feedback. Get in touch via our support email or send us a message through the contact form.