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Schema · AI search · Technical SEO

Free SEO Tools for Schema, AI Search, and Technical SEO

ToolsInstant is a focused set of free SEO tools for marketers, SEO professionals, agencies, and site owners. Generate valid JSON-LD, control how AI crawlers access your site, and audit the technical details that decide how search engines read your pages. Our free SEO tools run in your browser, so the files and code you paste are never uploaded.

Browse all tools Start with Schema Tools
  • Free to use, no account needed
  • Your files and code stay in your browser
  • Output checked against schema.org and Google's documentation
Free SEO tools workflow: paste your input, review the checks, and copy validated JSON-LD output

Free SEO tools by category

The free SEO tools are grouped by the job they do, from a schema markup generator for every major type to AI search tools and technical SEO tools for crawling and indexing. Pick the area you're working on, or browse every tool on one page.

Why these free SEO tools are different

Big multi-tool sites cover hundreds of topics with the same generic form. The free SEO tools on ToolsInstant cover fewer topics and go deeper on each one, because a schema markup generator that outputs invalid markup is worse than no tool at all.

Your data stays in your browser

Our free SEO tools are written in plain JavaScript and run on your device. The HTML, JSON-LD, robots.txt files, and Search Console exports you paste are processed locally and are never sent to our server. The exceptions are a keyword you look up in the Keyword Research Tool, which needs live search data, and the URLs you ask a URL-checking tool, such as the Redirect Checker or Indexability Checker, to check. Our server requests those for you and doesn't store them.

Checks that explain themselves

Analyzers don't just return a score. Each issue comes with the reason it matters and a specific fix, so you can correct the problem and understand it the next time you see it.

Guides from real client work

Every tool page includes a worked example and a practical guide covering best practices and common mistakes, written from hands-on technical SEO work rather than rewritten documentation.

How the free SEO tools work

Browsers can't fetch other websites for security reasons, so these technical SEO tools work on input you provide. That keeps them fast and private, and it means they also work on staging sites and pages that aren't live yet.

  1. Paste or fill in your input

    Business details, page HTML, a JSON-LD block, a robots.txt file, a URL list, or a CSV export, depending on the tool.

  2. Review the checks

    See what's valid, what's missing, and what to fix, with warnings based on current search engine guidelines.

  3. Copy or download the result

    Paste the output into your site, your CMS, or your SEO plugin, or download it as a file.

Example output from the LocalBusiness JSON-LD generator for a dental practice
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Dentist",
  "name": "Bright Smile Dental",
  "url": "https://www.example.com/",
  "telephone": "+1-512-555-0142",
  "address": {
    "@type": "PostalAddress",
    "streetAddress": "120 Main St",
    "addressLocality": "Austin",
    "addressRegion": "TX",
    "postalCode": "78701",
    "addressCountry": "US"
  },
  "openingHoursSpecification": [{
    "@type": "OpeningHoursSpecification",
    "dayOfWeek": ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"],
    "opens": "08:00",
    "closes": "17:00"
  }]
}
</script>

Built by a working technical SEO specialist

ToolsInstant is built and maintained by Devansh Thakkar, a WordPress developer and technical SEO specialist. Since 2019 he has delivered more than 250 projects for clients in over 15 countries, covering technical audits, schema markup, site migrations, and AI search optimization.

These free SEO tools started as the checks and generators he uses on client sites. Each one is rebuilt for public use, tested against real-world input, and kept up to date as search engines and AI search tools change their requirements.

More about Devansh Thakkar

Frequently asked questions

Are these free SEO tools really free?

Yes. Every tool on ToolsInstant is free to use, with no account, trial, or usage limit on single runs. If paid bulk features are added later, the standard tools will stay free.

Is the data I paste uploaded anywhere?

Not for most tools. They run as JavaScript in your browser, so the HTML, JSON-LD, robots.txt files, URL lists, and CSV exports you paste are processed on your device and are not sent to our server. Tools that check a live URL, such as the XML Sitemap Validator and the Redirect Checker, send the URLs you enter to our server, which requests them and returns the results without storing them. The Internal Link Analyzer fetches the pages of the site you enter the same way, following robots.txt.

Can the tools check a page from its URL?

Most tools work on content you paste, because browsers block websites from reading other websites for security reasons, a rule known as CORS. Pasting also lets you check staging sites and pages that are not live yet. Tools that need a live server response, such as the XML Sitemap Validator and the Redirect Checker, request the URL through our server instead.

Will the schema markup I generate get rich results in Google?

Valid structured data makes a page eligible for rich results, but Google decides whether to show them based on page quality and its own policies. Some types are limited: FAQ rich results only appear for well-known government and health sites, and HowTo rich results are no longer shown. Each schema markup generator on ToolsInstant notes these limits.

How do I check that my structured data is valid?

Run the output of any JSON-LD generator through the JSON-LD Validator here for syntax and property checks, then confirm with Google's Rich Results Test for rich result eligibility and the Schema Markup Validator for general schema.org validity.

Who builds ToolsInstant?

ToolsInstant is built and maintained by Devansh Thakkar, a WordPress developer and technical SEO specialist who has delivered more than 250 client projects since 2019.

Pick a tool and fix one thing today

Most of these free SEO tools take less than a minute. Paste your input, apply the fixes, and move on.

Browse all tools