Schema.org
Schema App
Schema Validator
Yoast SEO
Sequel Pro
phpMyAdmin
SEO Tools Centre
Easyschema.com
ValidateHTML
W3C Markup Validation Service
Json List
Code Beautify JSON Validator
HTML Validator
Schema Validator
Total Validator
ValidateHTML is a free suite of 12 web validation tools in one place. Paste code or enter a URL to validate HTML, CSS, JSON, XML, check meta tags, Open Graph data, accessibility, robots.txt, and more. Every validation returns a quality score from 0 to 100 so you know exactly where you stand. No signup required, no usage limits, completely free.
Schema.org ValidateHTMLWebsite owners, SEO professionals, and developers who are interested in improving their website's search engine performance and who wish to implement rich search features. It is also useful for businesses of all sizes, especially those looking to optimize their online presence through structured data.
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ValidateHTML's answer:
12 validation tools in one place with an instant quality score from 0 to 100. No signup, no limits, completely free. Paste code or enter a URL and get results in seconds.
ValidateHTML's answer:
Instead of opening 5 different tabs (W3C for HTML, JSONLint for JSON, separate tools for meta tags, Open Graph, accessibility), ValidateHTML combines everything in one interface. Plus you get a quality score that tells you exactly where you stand.
ValidateHTML's answer:
Web developers, frontend engineers, and SEO specialists who need to validate code quality before deploying. Also useful for freelancers and agencies managing multiple client sites.
ValidateHTML's answer:
I was tired of opening 5 or 6 different tabs every time I needed to validate my code before deploying. W3C for HTML, JSONLint for JSON, random sites for meta tags. So I built one tool that does everything, with a quality score to instantly know where you stand.
ValidateHTML's answer:
Next.js, React, TypeScript, Tailwind CSS, deployed on Vercel.
ValidateHTML's answer:
Independent web developers, Freelance frontend engineers and Small web agencies.
Based on our record, Schema.org seems to be more popular. It has been mentiond 288 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Html { "@context": "https://schema.org", "@type": "LocalBusiness", "name": "Acme Furniture", "description": "Custom furniture workshop in Rawalpindi, Pakistan.", "address": { "@type": "PostalAddress", "streetAddress": "Main Murree Road", "addressLocality": "Rawalpindi", "addressCountry": "PK" }, "telephone": "+923000000000", "url": "https://example.com", ... - Source: dev.to / about 1 hour ago
{ "@context": "https://schema.org", "@type": "LocalBusiness", "name": "...", "address": { "@type": "PostalAddress", ... }, "telephone": "..." } Add Service schema per service page, FAQPage on any page with real Q&A, BreadcrumbList sitewide, and HowTo on process/tutorial content. FAQ schema specifically gets lifted verbatim by LLMs more than any other type I've tested against. If you implement one... - Source: dev.to / 1 day ago
{ "@context": "https://schema.org", "@type": "BlogPosting", "headline": "Liveness Without Health Is Theater", "description": "A heartbeat that fires on every run proves a job ran, never that it succeeded โ the fix is two markers plus meta-monitoring the watchers.", "url": "https://startaitools.com/posts/liveness-without-health-is-theater/", "datePublished": "2026-07-10T08:00:00-05:00", ... - Source: dev.to / 3 days ago
{ "@context": "https://schema.org", "@type": "BlogPosting", "headline": "Adversarial Review: The Six Lenses That Halted a Rollout", "description": "A six-lens adversarial review checked a team knowledge system against live state, broke three shipped assumptions, and gated 18 risks to halt the rollout.", "author": { "@type": "Person", "name": "Jeremy Longshore" }, "publisher": { "@type":... - Source: dev.to / 4 days ago
Export function ArticleSchema({ post }) { const json = { "@context": "https://schema.org", "@type": "BlogPosting", headline: post.title, datePublished: post.publishedAt, author: { "@type": "Person", name: post.author }, image: post.coverImage, }; return ( ); }. - Source: dev.to / 5 days ago
Schema App - Schema App empowers the Digital Marketer to own their schema markup strategy through to implementation without ever writing code.
W3C Markup Validation Service - Validates HTML markup of web pages, one at a time.
Schema Validator - Free schema markup validator for JSON-LD and Schema.org structured data. Validate schema markup for Google Rich Results compliance. Online schema validator tool.
Json List - Json List is a lightweight tool for viewing and managing JSON data. Open any local JSON file or load one from a URL, then explore it in a clean, user-friendly list format.
Yoast SEO - Yoast SEO does everything in its power to please both visitors and search engine spiders.
Code Beautify JSON Validator - Code Beautyโs JSON Validator or JSON Lint is easy to use tool to copy, paste and validate JSON data.
