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.

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

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.

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.

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.

SEO audit API. Send a URL, get a 0 to 100 score, a grade, category scores, AI readability scores and a prioritized fix list as JSON.

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

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

Web Intelligence API audits websites, detects their tech stack, converts pages to Markdown, finds broken links and extracts text from PDFs with OCR, all with one key.

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

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

Enhance the contrast of overly dark or bright images, making them more vivid and visually appealing with the Image Contrast Enhancement API.

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

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.

Finds the weak points in a website Content Security Policy that undermine script-injection protection. Returns one graded JSON report with a verdict, grade and stable issue codes.

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.

Technical SEO, metadata and JSON-LD audit of any public web page in one request. Returns title and meta description checks (including duplicates), Open Graph and Twitter Card tags, indexability (meta

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

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

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.

Check whether a URL can be indexed by Google: meta robots, X-Robots-Tag, canonical and robots.txt signals in one call, returned as a graded JSON report.

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.

Give it a URL (and optionally the Origin to check) and it checks that server's CORS response headers (Access-Control-Allow-Origin, -Methods, -Headers, -Credentials, -Max-Age) using both a simple