Does a header’s presence mean the site is protected?

No. This check records the headers that arrived and whether a value matches the syntax it knows. It does not score protection or prove that a policy is effective.

What is the difference between CSP and Report-Only?

Content-Security-Policy is an enforcing policy. Content-Security-Policy-Report-Only monitors violations and does not apply those restrictions.

Does no-cache mean caching is disabled?

No. no-cache allows storage but requires revalidation before reuse. no-store asks caches not to store the response. private, no-cache is not the same as caching disabled.

Does this check test CORS?

It shows Access-Control headers when they are present. It does not send an Origin or a preflight, so it does not decide whether CORS is valid.

Free web tools

SEO tools.

Review on-page signals, redirects, robots.txt, sitemaps and how a page is described.

Choose your next check.

Find the tool that matches your task.

SEO Checker

Inspect page-level SEO signals from fetched HTML and prioritize practical fixes.

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SEO Audit

Performance & Core Web Vitals audit powered by Google Lighthouse data.

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Meta Tags Checker

Read title, description, canonical and robots tags from one fetched HTML page. Length notes are advisory.

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Redirect Checker

Check URL redirects and follow the full redirect chain. Detect redirect loops, excessive hops, HTTPS issues, and canonical problems affecting SEO.

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Robots.txt Checker

Analyze your robots.txt file to control search engine bots. Validate directives, find errors, and ensure proper indexing using this free online checker.

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Sitemap Validator

Validate sitemap files and indexes. Discovery uses robots.txt and the paths this checker requests. Listed pages are not fetched.

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Open Graph Preview

Simulate Facebook, LinkedIn and X cards from one fetched HTML page. Previews are not official platform renders.

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ads.txt File Checker

Fetch /ads.txt from one origin and review the response, seller records and format findings.

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Favicon Checker Tool

Discover icon sources and inspect their files, formats and declarations.

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HTTP Headers Checker

Inspect response headers, redirects and the context of an HTTP request.

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Which tool do you need?

Find a tool based on what you want to do.

Review page metadata

Check the title, description, canonical and related on-page signals.

SEO Checker

Follow a redirect chain

See each hop, including HTTP to HTTPS and loops.

Redirect Checker

Review robots.txt and sitemaps

Start with robots.txt. Use Sitemap Validator for the XML sitemap.

Robots.txt Checker

Learn the basics

Understand what these checks cover.

Use them to inspect a page, a redirect chain, or the files crawlers read. They do not guarantee rankings.

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What the on-page checks cover

SEO Checker looks at meta tags, content structure and technical signals on a page. SEO Audit reports Lighthouse lab data, including Core Web Vitals. Neither one is a ranking guarantee.

What is an SEO checker?

It reviews factors such as meta tags, headings and technical signals on a URL and lists what this tool could read. It does not decide whether a page will rank.

How is SEO Checker different from SEO Audit?

SEO Checker focuses on on-page signals such as titles, descriptions, canonicals and headings. SEO Audit uses Google Lighthouse lab data for performance, including LCP, INP and CLS.

What the crawler checks cover

Robots.txt Checker reads the robots file. Sitemap Validator checks the XML sitemap. Redirect Checker follows the hop chain. HTTP Headers Checker shows the response headers a request returned.

Do redirects affect crawling?

A long chain, a loop, or a hop that never reaches HTTPS can waste crawl time and confuse canonical signals. Redirect Checker lists the hops it could follow.

What Open Graph and favicon checks show

Open Graph Preview shows the title, description and image tags a page exposes for social cards. Favicon Checker looks for the icon files a browser would request. Meta Tags Checker reads the meta tags in the page head.

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