SEO tools

Snippets, structured data and crawl rules, checked before they go live instead of after.

SEOhreflang generatorGenerate hreflang in all three formats, with checks for the errors that silently break a language set.SEOrobots.txt testerTest any URL against any crawler and see exactly which rule decides it — and why that rule wins.SEOSchema markup generatorBuild valid JSON-LD for the six types worth marking up — and see which properties Google still needs.SEOSERP snippet previewSee exactly where Google will cut your title and description — measured in pixels, not characters.SEOURL slug generatorTurn a title into a clean URL — including titles that are not in Latin script.SEOSocial share previewSee the card a link will produce on Facebook, X and LinkedIn — before you post it.

Which one do I need?

Check it before it ships, not after it ranks

Every tool in this section answers a question that is cheap before publication and expensive afterwards. Will the title survive the cut. Does the markup carry what the feature needs. Is that language cluster actually reciprocal. Will the crawler read this rule the way you meant it. Fixing any of these after a page is indexed means waiting for a recrawl to find out whether you were right.

Titles and descriptions are measured in pixels

Google truncates by width, not by character count, which is why a 60-character title full of capitals gets cut while a longer one in narrow letters survives intact. The snippet preview measures the rendered width the same way, on desktop and mobile separately, because a title that fits a laptop often loses its ending on a phone — where most searches happen.

The rules that are most often got wrong

Two in particular. In robots.txt the most specific rule wins, not the first one in the file, and a crawler obeys exactly one group — the one naming it, or the wildcard if none does. In hreflang, a set only works if every page points back; a one-directional cluster is silently ignored. Both tools show you which rule actually decided the outcome rather than just returning a verdict.

What these tools will not do

They do not crawl your site, fetch your pages or talk to Google. They work on what you paste in, which is deliberate: fetching a page in a browser tab would show you the rendered DOM, and crawlers do not run JavaScript. The source you copy from View Source is what they actually see.