Technical SEO Tools
Free technical SEO tools for site owners and developers: validate robots.txt, XML sitemaps, hreflang tags and JSON-LD schema, check canonical tags, extract meta tags and links, preview Open Graph cards, clean tracking parameters and format redirect maps.
Most ranking problems that are not about content are about technical details: a robots.txt rule that blocks the wrong folder, a sitemap with a broken date, a canonical tag pointing at the wrong page or hreflang codes that search engines ignore. These technical SEO tools check each of those in seconds.
The tools work on text you paste, such as page source, a sitemap or a list of URLs, so they never need access to your website and nothing is sent to our servers.
Crawling and indexing
Robots.txt Syntax Validator
Find errors in robots.txt and test whether a URL path is allowed or blocked for a crawler.
Sitemap XML Validator
Check sitemap structure, URLs, dates, priority values and size limits.
Canonical Tag Checker
Find canonical tags in page source and spot duplicates, relative URLs and conflicts.
Hreflang Tag Validator
Validate language and region codes, x-default and self-references in hreflang tags.
On-page markup
Meta Tag Extractor
Pull the title, description, robots, Open Graph and Twitter tags out of page source.
Open Graph Preview Generator
Write Open Graph and Twitter Card tags and preview how a shared link will look.
Schema JSON-LD Validator
Check structured data syntax and common required properties for popular schema types.
HTML Link Extractor
List every link in a block of HTML with anchor text, rel attributes and internal or external type.
URLs and redirects
URL Parameter Cleaner
Strip UTM and other tracking parameters from lists of URLs and remove duplicates.
Redirect Mapping Formatter
Turn old-to-new URL lists into Apache, Nginx, Netlify or Vercel rules and catch loops and chains.
A simple technical SEO checklist
- Robots.txt: make sure important sections are not blocked and your sitemap is listed.
- Sitemap: include only canonical, indexable URLs with valid dates.
- Canonicals: exactly one canonical tag per page, absolute, pointing to the preferred URL.
- Structured data: valid JSON-LD that matches what is visible on the page.
- Sharing tags: Open Graph title, description and image so links look good on social media.
- Migrations: map every old URL once, avoid redirect chains and loops, and keep tracking parameters out of indexed URLs.
Frequently asked questions
Do these tools fetch my website?
No. You paste page source, a file or a list of URLs, and the check runs in your browser. This also means they work on staging sites and files that are not public yet.
Can a validator guarantee rich results?
No. Valid markup is required but not enough: search engines decide whether to show rich results based on quality and their own policies.
Is my data stored?
No. Nothing you paste is uploaded or saved.
Where do I find a page’s source code?
In most browsers, right-click a page and choose View page source, then copy everything or just the head section.