Free SEO tools

11 tools

A directory of small, free tools I've built for SEO, structured data and the agentic web. Each one runs in your browser and has its own dedicated page. No sign up.

Can AI crawlers reach my site?

3 tools

AI Crawler Access Checker

Probes your site as GPTBot, ClaudeBot and PerplexityBot and finds the blocks that keep you out of AI answers.

Check your site

Example · suganthan.comOpen to AI crawlers

  • GPTBotallowed
  • OAI-SearchBotallowed
  • ChatGPT-Userallowed
  • ClaudeBotallowed
  • Claude-Userallowed
  • PerplexityBotallowed
  • Google-Extendedallowed
  • CCBotallowed

499 Timeout Risk Checker

Times any URL the way AI live fetchers do and rates the risk that one gives up on it.

Time a page

Example · suganthan.comFast enough for live fetchers

  • ChatGPT-User16 ms
  • Claude-User20 ms
  • Perplexity-User16 ms
500 ms target

Common Crawl Visibility Checker

Checks whether your site is in Common Crawl, with 12 months of capture history for any domain or page.

Check a domain

Example · suganthan.comIn 12 of 12 crawls

  1. October 2025: 3 pages
  2. November 2025: 3 pages
  3. December 2025: 4 pages
  4. January 2026: 3 pages
  5. February 2026: 8 pages
  6. March 2026: 48 pages
  7. April 2026: 34 pages
  8. May 2026: 26 pages
  9. June 2026: 36 pages
  10. July 2026: 55 pages
  11. August 2026: 55 pages
  12. September 2026: 46 pages

Pages captured per crawl, October 2025 to September 2026. 46 in the latest.

Is my site ready for AI agents?

3 tools

OKF Bundle Generator

Turns any website into an Open Knowledge Format bundle for AI agents, up to 100 pages at a time.

502 bundles built by 372 people in the last 90 days

Build a bundle

What the zip holdsokf-yoursite-com.zip

  • index.mdthe bundle's front page
  • log.mdwhat changed, and when
  • <page>.mdone concept for each page, up to 100

Serve it at yoursite.com/okf/, starting at /okf/index.md.

Agentic Resource Discovery Checker

Checks for the discovery file AI agents read to find what a site offers, and turns what is missing into a setup list.

Check a domain

Example · suganthan.comReady, 8 of 8 checks

  • ai-catalog.json found
  • specVersion 1.0
  • 3 valid entries
  • Agentmap in robots.txt
  • HTML link tag
  • HTTP Link header
  • did:web identity
  • AI clients can read it

Agentic Web Search

Describe a capability in plain English and get back the agents, MCP servers and tools that can do it.

Search for a capability

Example search · MCP servers4 results

“summarise web pages as markdown”

  • WeVisDoc-4B: Document to Markdown MCP ServerConvert document page images to structured Markdown
  • Web Scraper MCP ServerScrape a website and download its content as markdown

Does Google know who I am?

3 tools

Knowledge Panel Readiness Checker

Shows whether Google, Wikidata and Wikipedia know who you are, and what a Knowledge Panel still needs.

545 checks by about 230 people in the last 90 days

Check a name

Example · Suganthan Mohanadasan3 of 4 signals

  • Google entity/g/11q1_jdcqb
  • Search Profile, claimed@suganthan
  • Wikidata itemQ141144940
  • Wikipedia articlenone yet

Google Search Profile URL Generator

Turns a Knowledge Graph ID into a direct Google Search profile link, useful outside the US.

About 840 searches by about 300 people in the last 90 days

Get a profile link

Example · Suganthan MohanadasanProfile link

Knowledge Graph ID
/g/11q1_jdcqb
Google Search profile link
profile.google.com/cp/Cg0vZy8xMXExX2pkY3Fi

Schema Markup Generator

Generates validated Person or Organization JSON-LD with your sameAs links, entirely in your browser.

Generate your schema

Example · PersonJSON-LD

{
  "@context": "https://schema.org",
  "@type": "Person",
  "name": "Suganthan Mohanadasan",
  "jobTitle": "Co-founder",
  "worksFor": {
    "@type": "Organization",
    "name": "Snippet Digital"
  },
  "url": "https://suganthan.com/",
  "sameAs": [
    "https://profile.google.com/cp/Cg0vZy8xMXExX2pkY3Fi",
    "https://www.linkedin.com/in/suganthan-mohanadasan/",
    "https://x.com/suganthan"
  ]
}

What is Search Console hiding?

2 tools

Keyword Relevance Filter

Filters your Search Console queries by business relevance and own brand, with editable labels and CSV or JSON exports.

Filter your queries

From the example file3 labels

  • keyword clustering toolRelevantNon-branded
  • keyword insights pricingRelevantBranded
  • content calendar templateOutside scope

Brief: “keyword research and keyword clustering software”.

AI Mode and AI Overview Query Classifier

Sorts the AI Mode conversations out of your Search Console queries and labels every one.

Classify your queries

From the example export76 queries

  • Conversational8
  • Reply artefact6
  • Pivot3
  • Tracker probe3
  • Agent harness2
  • Pasted string2
  • Long, uncategorised2
  • Ordinary50