Tools for inspecting website SEO
These tools work on HTML you paste or files you select, so they show what is in the page source. A preview shows how a result may look; search engines and social sites choose what they finally display.
Inspect page signals and previews
Search-result preview
Preview how a title and description may look in search results on desktop and mobile.
Single-page SEO checker
Inspect a page's title, meta tags, headings, links, images and indexability from its HTML.
Social-sharing preview checker
Inspect Open Graph and Twitter Card tags in a page's HTML and preview link cards.
Canonical and hreflang checker
Check canonical tags and hreflang alternates in your pages' HTML, including return links.
Broken-link checker
Find broken internal links, images and anchors in a folder of HTML files.
Prepare crawl and structured-data files
Guides
- Writing title tags and meta descriptions that fit in search results: How search results truncate titles and descriptions by pixel width, a simple formula for writing both, worked examples and common mistakes.
- How to write a robots.txt file (and what it cannot do): How robots.txt rules are matched, ready-to-use examples, how to test a path, and why blocking a page from crawling does not keep it out of search results.
- Structured data and JSON-LD basics for small websites: What schema.org structured data is, how JSON-LD works, which types a small site needs, complete examples, and errors that stop it working.
- Open Graph tags and social preview images: sizes and fixes: Which Open Graph and Twitter Card tags a page needs, the image size that works almost everywhere, and how to fix link previews that are wrong or missing.