Paste a URL. Get back a single report covering SEO, schema, E-E-A-T, voice, mobile parity, performance, AI-search signals, and publishing cadence — plus a ready-to-paste fix prompt you can drop into Claude or ChatGPT. No signup, no tracking, no paywall. Built it because the paid tools charge a subscription for output you could do in one pass.
Paste a URL. The Mega Analyzer fetches it twice (desktop and mobile UAs), the aux files (robots.txt, sitemap.xml, llms.txt), validates crawlability (Disallow conflicts, sitemap XML validity, URL-in-sitemap, dead-end detection, noindex + X-Robots-Tag overrides), then runs every check we can run against a single URL and scores six buckets: SEO, Schema, E-E-A-T, Voice, Mobile Parity, Performance + AI. Takes about 25 seconds.
When the static fetch can't see your real content, paste the post-hydration HTML here. The Mega Analyzer scores the pasted HTML against every dimension (SEO / schema / E-E-A-T / voice / mobile / performance + AI / crawlability). If you also paste a URL above, sibling resources (robots.txt, sitemap.xml, llms.txt, well-known files) are still fetched normally — those rarely depend on JavaScript. New to DevTools? Step-by-step walkthrough for Chrome / Firefox / Safari / iPhone / Android.
Tip: in paste mode, the URL field is optional. If provided, sibling resources + CrUX field data are fetched from it; otherwise those checks read as "Not applicable in paste mode".
Read the story behind this tool: One URL, Every Audit in One Pass — The Mega Analyzer →
The Mega Analyzer gives you everything the other tools do in one report.
Ten buckets in one pass: SEO, Schema, E-E-A-T, Voice, Mobile parity, Performance + AI signals, Accessibility (WCAG 2.2 AA), Indexing hygiene, Retrieval (AEO) readiness, and an AI fix prompt assembled from every finding. See the methodology page for the per-bucket check list.
No. The tool fetches the raw HTML response twice — once with a desktop user agent and once with a mobile user agent. JavaScript-rendered content that requires a headless browser is not scored. This matches how most AI crawlers actually fetch your site.
No signup, no tracking pixels beyond standard GA4 + Clarity, no paywall. The tool runs in your browser against a server-side fetch proxy with origin allowlisting and per-IP rate limits.
Each check returns pass / warn / fail / info. Warns count as 0.5 of a pass. Bucket score is the weighted average across that bucket's checks. The overall grade is the unweighted average of bucket scores, mapped to A–F. The full rubric and per-check weights are published at /methodology/.
isitagentready.com (by Cloudflare) tests five categories of agent-readiness signals. Mega Analyzer probes the same agent-readiness surface (Content-Signal, Link headers, MCP server card on both Cloudflare and SEP-2127 paths, Agent Skills, WebMCP, Web Bot Auth, OAuth metadata, x402, MPP, UCP, ACP) and also runs SEO, schema, E-E-A-T, accessibility, and publishing-cadence checks in the same pass.
The check set is versioned. See /methodology/changelog/ for the dated probe history. The most recent batch — nine SHIP-NOW checks covering AGENTS.md, /.well-known/mcp.json (Cloudflare path), x402 v2, OAuth-PR Link headers, Vary: Accept on markdown, per-page markdown companions, llms-ctx.txt, JSON Feed v1.1, and schema:usageInfo — landed on 2026-05-10.