05 / SEO

Free SEO Tools

Technical SEO tools for your website. Generate and test robots.txt for Googlebot and AI crawlers, and build JSON-LD schema markup with Google's required fields marked. Free, with no sign-up and no limits.

3 Tools No Sign-up No Usage Limits Runs in Your Browser
3Free SEO tools
33Crawlers you can test
15Schema types

Nothing matches that. Try robots, schema, googlebot, sitemap or youtube. Looking for Instagram downloaders? They are in the Instagram Tools hub.

Start here

Which tool, and when

The three tools cover the two technical questions every site has to answer: what search engines are allowed to crawl, and how they should understand what they find.

Launching or moving a site

Build the file with the Robots.txt Generator, using the WordPress, WooCommerce or Blogger preset, then add your sitemap line before you go live.

Pages missing from Google

Check crawling before anything else. The Robots.txt Tester fetches your live file and shows the exact line that blocks a URL, if one does.

Deciding about AI crawlers

Block training bots such as GPTBot while staying visible in AI search. The generator has a preset for it, and the tester checks all AI crawlers at once.

Earning rich results

The Schema Markup Generator marks the fields Google requires for each type and says which types still produce a rich result.

These tools cover crawling and structured data, the technical layer. Rankings also depend on content, links and page experience, and Google Search Console remains the final word on what Google actually did with your site.

FAQ

Free SEO Tools: FAQs

What are SEO tools?

SEO tools are online utilities that help a website get found in search. They cover research, content, links and the technical side. The tools on this page are technical: they control what search engines may crawl with robots.txt, and describe your pages to them with schema markup.

Are these SEO tools free?

Yes. All three are free, with no sign-up, no account and no usage limit. Advertising on the site covers the running costs.

What can I do with the tools on this page?

Three things. Build a robots.txt file with presets and AI crawler controls, test any live robots.txt against 33 crawlers to see which rule allows or blocks a URL, and generate JSON-LD schema markup for 15 types with Google's required fields checked as you type.

What is the difference between robots.txt and schema markup?

robots.txt tells crawlers which URLs they may request. Schema markup tells search engines what a page is about once they have read it, such as a product, a recipe or an article. One controls access, the other adds meaning, and most sites benefit from both.

Do I need a robots.txt file?

Not strictly. Without one, crawlers may crawl everything, which is fine for many small sites. A robots.txt becomes useful when you want to keep low value pages such as admin areas, internal search results or filter URLs out of crawling, and it is the easiest place to list your sitemap.

Do you have keyword research or backlink tools?

Not yet, and it is more useful to say so than to send you looking. Those tools depend on large paid datasets. More technical SEO tools are being added to this page first. For your own site, Google Search Console shows real search queries for free.

Can these tools improve my rankings?

They remove technical obstacles, which is not the same as ranking for you. A robots.txt mistake can hide a whole site, and missing schema fields can cost a rich result, so fixing them matters. Position still depends on content quality, search intent and links.

Do you store what I enter?

No. The Robots.txt Generator and the Schema Markup Generator run entirely in your browser. The Robots.txt Tester sends only the domain you type to our server so it can fetch that site's /robots.txt, and pasted text never leaves your browser. Nothing is stored.

Where did the YouTube tools go?

They moved to their own YouTube Tools page, together with the guides that go with them. Every tool kept its address, so existing links and bookmarks still work.

Who are these tools for?

Site owners, bloggers, developers and SEO specialists. Each tool explains its result in plain language, so you do not need to know robots.txt syntax or the schema.org vocabulary before you start.

What tools are coming next?

More technical SEO utilities for websites. Have a request? Contact the team and we will prioritise it. For short form video, see the Instagram tools.

How it works

robots.txt matching is ported from Google's open-source parser. Schema required fields follow Google's structured data documentation.

Runs in your browser

The generators build everything on your device. Only the tester's live fetch uses our server, and only to download a public robots.txt.

Privacy

Nothing you type or paste is stored, logged against you or shared.

Disclaimer

These tools check syntax and rules. Search engines make the final decision, so confirm important changes in Search Console.

Aayush Kulshrestha, founder of Calcxi

Written & verified by

Aayush Kulshrestha

B.Tech Computer Science · 8 years in web development & SEO · Bhilwara, India
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