Evaluates any text and provides a coherence score, assessing its logic, consistency, and clarity.

Audit robots.txt directives (Disallow, Allow, Crawl-delay) against XML Sitemap URLs. Identifies blocked sitemap URLs, missing sitemaps, and indexing discrepancies.

Convert HEX, RGB, HSL and CMYK, generate palettes, shades and tints, pick the best text color and check WCAG contrast ratio.

Compare two texts by lines, words or characters and get a structured difference plus a unified patch, like version control tools produce. Built for change tracking, reviews and audit logs.

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.

Score the readability of any English text. Returns Flesch-Kincaid, Gunning Fog, SMOG, ARI scores, sentence-level breakdown, improvement suggestions, and target grade pass/fail in one call.

Gain real-time insights into website navigation and performance with our Web Navigator Status Insight API.

Run automated WCAG accessibility audits on any web page. Detects violations, warnings, and best practices for ADA and EAA compliance.

Submit a URL and instantly learn if it’s indexable by Google, with detailed diagnostics for robots rules, meta tags, redirects, soft-404s, and more.

Text Difference Comparison API allows you to easily compare two strings or texts and view the differences between them. The API returns a JSON for easy processing and also provides pre-rendered results for HTML and CLI output

Analyzes URLs, detects redirects, status codes, indexability, meta robots, robots.txt, and soft 404s, providing comprehensive information on status and SEO.

Audit web pages or whole websites for WCAG 2.2, EN 301 549 (European Accessibility Act) and Section 508 in a real browser. JSON, CSV or HTML report.

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.

Check public web pages for adult or restricted textual content. Returns the best matching safety category and a concise explanation for moderation and filtering workflows.

Analyze a public web page against developer-defined safety categories. Receive the detected category and an explanation for content filtering, compliance, and review.

Make your content accessible to all users with the Accessibility Compliance Accessibility Compliance Readability API.

Streamline complex information using the Technical Writing Technical Writing Readability API for clear communication.

Ensure your legal documents are crystal clear with the Legal Compliance Legal Compliance Readability API.

Optimize your SEO strategy by improving readability with the SEO Optimization SEO Optimization Readability API.

Boost student understanding with the EdTech Readability Improvement API designed for educational content.

Analyze and improve academic texts with the Academic Readability Analysis API for robust insights.

Increase user engagement by enhancing readability with the User Engagement User Engagement Readability API.

Enhance your content's clarity with the Content Marketing Content Marketing Readability API for better engagement.

Checks a public homepage’s SEO crawlability, indexability, robots.txt, sitemap, canonical, title, meta description, and H1 signals.

Classify public web pages for adult, gambling, violent, hateful, drug-related, or other unsafe content. Returns the detected category, an explanation, and usage details.