Technical SEO helpers that run on your device
These tools handle the technical, on-page side of SEO: JSON-LD schema generators (Article, Product, FAQ, LocalBusiness, Event, Breadcrumb), an hreflang tag builder, a sitemap.xml generator, a pixel-accurate SERP snippet preview, and analysers for readability, keyword density, and heading structure.
Everything is generated in your browser from what you type — no crawler pinging your site, no content sent to a third-party API. Paste, generate, copy, and drop the result into your CMS or template.
A practical on-page workflow
Draft the page, then check it reads well with the readability score, confirm the heading hierarchy has a single logical H1→H6 flow, and tune your target terms with the keyword density analyser. Before publishing, preview how the result looks in Google with the SERP preview, add the right structured data with a schema generator, and wire up hreflang and your sitemap for crawlability.
- Rich results: generate valid JSON-LD for articles, products, FAQs and more
- International: build hreflang tags with x-default
- Content quality: Flesch-Kincaid readability and keyword density
- Crawlability: SERP pixel preview, heading outline, and sitemap.xml
Standards-based output you still review
The schema generators follow schema.org types that Google documents for rich results, and the readability scores use the standard Flesch-Kincaid and Gunning Fog formulas. They give you correct, copy-ready markup and metrics, but SEO always depends on context — validate structured data in Google's Rich Results Test and treat scores as guidance, not guarantees of ranking.
Browse related how-tos in our Guides, or read more about why Whiztools keeps processing on-device in About.