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Technical Validation Social Preview Validation RDFa Validator Link Verification Hreflang Validation Web Page Analysis Screenshot Capture Redirect Chain Analysis Twitter Card Validator Schema Markup Validation Markup Security Data Extraction Web Scraping Invoice Data Extraction Platform Score Analysis Microdata Analysis JSON-LD Extraction Structured Data Analysis CI Integration Social Media Optimization

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Best schema markup validation APIs

Schema Markup Validator API

Data & Analytics

Validate structured data markup on any web page including JSON-LD, Microdata, and RDFa. Detects Schema.org types, checks for errors, and returns detailed validation results.

Free 7-Day Trial

100% uptime 223ms avg MCP ready

Structured Data Markup Validator API

Data & Analytics

Extracts and validates JSON-LD, Microdata, RDFa, and structured markup from webpages or raw HTML for SEO and technical validation.

Free 7-Day Trial

100% uptime 1,874ms avg MCP ready

Web Content Sanitizer API

Security & Cybersecurity

Clean untrusted web markup in one call: strip scripts, event handlers and dangerous attributes to prevent injection attacks, while keeping safe formatting. Three cleaning profiles plus a custom allowed tag list.

Free 7-Day Trial

100% uptime 139ms avg MCP ready

Markdown Document Converter API

Tools & Utilities

Convert lightweight markup documents into clean sanitized web markup, styled print ready documents or editable word processor files, with real heading styles, lists, tables and code blocks.

Free 7-Day Trial

100% uptime 10,047ms avg MCP ready

Open Graph Twitter Card Validator API

Social Media & Networking

Validate Open Graph and Twitter Card tags from a page URL or pasted HTML. Get a graded JSON report with preview fields, coded issues, and whether required social meta tags are present.

Free 7-Day Trial

100% uptime 293ms avg MCP ready

Markdown to Safe HTML Converter API

Tools & Utilities

Convert GitHub flavored Markdown (tables, lists, code) to safe HTML. Scripts and inline handlers are stripped by default.

Free 7-Day Trial

100% uptime 1,198ms avg MCP ready

Open Graph and Social Preview Validator API

Social Media & Networking

Extracts and validates social preview metadata from webpages or raw HTML, including preview titles, descriptions, images, page URLs, content type fields, warnings, errors, and status information.

Free 7-Day Trial

100% uptime 3,493ms avg MCP ready

Social Preview QA API

Social Media & Networking

Instantly validate how any URL will appear when shared on Facebook, LinkedIn, Twitter, and WhatsApp. Returns a full JSON report with platform-specific scores, broken tag detection, image dimension checks, and plain-English fix instructions — all in a single API call.

Free 7-Day Trial

100% uptime 1,105ms avg MCP ready

Strict Math Validation Invoice Parser API

Other

Ensure precise math validation in invoice parsing for reliable financial records.

Free 7-Day Trial

100% uptime 675ms avg MCP ready

Web Page Meta Tags Extractor API

Tools & Utilities

Extract the search optimization data of any page: title and description with lengths, canonical address, social sharing cards, structured data types, headings map, link and image audit, word count and redirect chain.

Free 7-Day Trial

100% uptime 159ms avg MCP ready

RSS Atom Feed Validator API

Tools & Utilities

One GET, one graded JSON report: a headless RSS/Atom/JSON Feed validator for CI checks, publishing pipelines and feed directories. Give it a feed URL (or a website that links to its feed) and get a

Free 7-Day Trial

100% uptime 1,104ms avg MCP ready

Website to Markdown API for LLM Workflows

Natural Language Processing (NLP)

Convert public static and JavaScript-rendered web pages into clean Markdown for LLM ingestion, RAG pipelines, search indexing, and content processing.

Free 7-Day Trial

100% uptime MCP ready

Hreflang Validator API

Tools & Utilities

Checks a web page's hreflang annotations against Google's documented rules and verifies that up to 10 alternates link back. Returns one graded JSON report with stable issue codes.

Free 7-Day Trial