Meta tag previews, schema generators, robots and sitemap helpers, SERP snippet testers and keyword utilities.
20 of 20 tools
Measure a title and description by rendered width, with a live preview of the result.
Build a valid robots.txt, with platform presets and per-crawler AI controls.
Word count, reading time, sentence length and readability for a piece of writing.
Build a valid XML sitemap from a list of URLs, with correct escaping and dates.
Check a sitemap against the protocol — structure, namespace, dates and limits.
Generate valid JSON-LD for Article, Product, LocalBusiness, FAQ and more.
Turn any title into a clean, readable URL slug — accents and all.
Generate Open Graph tags so links to your page preview correctly when shared.
Generate a complete, correctly escaped <head> block in one place.
Check a page’s heading outline for missing h1, skipped levels and empty headings.
Build campaign URLs with correctly encoded UTM parameters.
Measure how often a keyword appears in your text, and where.
Check a URL against every documented crawler at once, and see which rule decided it.
Check pasted JSON-LD for syntax errors and structural problems.
Generate twitter: meta tags for link previews on X, with the right card type.
Produce a canonical link tag and check the URL for the mistakes that break it.
Build hreflang annotations for multilingual sites, validated as a set.
Analyse the links in pasted HTML — internal, external, anchor text and duplicates.
Percent-encode and decode URLs, with the component and full-URL modes kept apart.
Generate redirect rules for Apache, Nginx or Next.js, with paths escaped correctly.
Create strong random passwords with full control over length and characters.
Format, validate and minify JSON, with errors that point to the exact line.
Work out any percentage — of a number, as a share, or as a change.
Find the mean, median, mode and range of a list of numbers, with the working shown.
Sample and population standard deviation and variance, both shown, with the working.
Turn a logo into favicon.ico, the PNG sizes a site needs, and the HTML to declare them.