SEO & Marketing

Tools to generate JSON-LD schema, build UTM links, validate sitemaps, and analyse on-page SEO.

Generate schema.org JSON-LD markup for Article, Product, FAQ, LocalBusiness, Person, Event, and Breadcrumbs. Form-based, copy-paste ready.

Build trackable URLs with utm_source / utm_medium / utm_campaign params. QR code generated automatically. GA4 / Universal Analytics compatible.

Paste HTML and preview how Facebook, Twitter, LinkedIn, and Slack will render your share card.

Validate sitemap.xml structure, lastmod format, hreflang alternates, and URL count limits — all in your browser.

Simulate how Googlebot and other crawlers apply Allow/Disallow rules from your robots.txt to specific URLs.

Count word and phrase frequency, density %, and reading time. Multilingual stopwords for EN / VI / JA / ZH.