developer Overview
Technical SEO & Schema StudioFree onlineNo sign-upNo upload
Build Validated JSON-LD, Reciprocal Hreflang Tags & XML Sitemaps
Audit full HTML pages across heading, canonical, and Open Graph rules, build and validate 10 Schema.org JSON-LD types, generate reciprocal BCP-47 `hreflang` clusters, and lint `robots.txt` / XML sitemaps.
Open the free Technical SEO & Schema Studio
No account required · Runs in your browser · Instant results
Technical SEO & Schema Studio — json ld schema validator hreflang sitemap generator
SEO Studio enforces Google's rich-result and international SEO specifications locally before pages go live.
Quick tip: Every `hreflang` cluster must include a self-referencing tag on each page plus reciprocal return links across all language variants.
Frequently asked questions
Which Schema.org JSON-LD types can I generate and validate?
Article, FAQPage, BreadcrumbList, WebSite, Organization, SoftwareApplication, Product, LocalBusiness, HowTo, and VideoObject.
Use the full Technical SEO & Schema Studio
Access all features of the Technical SEO & Schema Studio — free, browser-based, no account required.
Open Technical SEO & Schema StudioYou might also need
cURL, HTTP & Security Header Studio
Convert shell-parsed curl commands to fetch(), axios, Python requests, Go, Rust and PHP with a redacted request inspector, build audited CSP/CORS/HSTS headers, generate Next.js/Vercel/nginx/Cloudflare/Apache redirect rules, and browse the RFC 9110 status & Cache-Control preset catalogue.
Markdown, Table & HTML Studio
Markdown editor with TOC, visual GFM table designer, and a Microsoft Word-style Document Studio — ribbon toolbar, navigation pane, page preview, templates, autosave and real .docx export.