Web & SEO
Web and SEO tools for developers and marketers — audit meta tags, sitemaps and structured data, look up DNS and WHOIS, and test APIs, all in your browser.
These tools run entirely in your browser. Open any of them in the app:
Meta Tags Inspector
Audit a page’s SEO and social meta tags from its HTML.
robots.txt Tester
Check which URLs a robots.txt allows or blocks for a given user-agent.
JSON-LD Validator
Validate and visualize JSON-LD, Microdata and RDFa structured data against schema.org.
Sitemap Validator
Validate an XML sitemap or sitemap index against the sitemaps.org spec.
DNS Lookup
Look up DNS records (A, AAAA, MX, TXT, NS and more) over DNS-over-HTTPS.
WHOIS Lookup
Look up a domain registration — registrar, dates, status and name servers — over RDAP.
API Tester
Send HTTP requests and inspect the response — a browser REST client.
Site Crawler / Bulk SEO Auditor
Crawl a sitemap or follow links and audit every page for titles, descriptions, indexability and more.
cURL Converter
Convert a curl command into fetch, axios, HTTPie, PowerShell, raw HTTP, or JSON.
OpenAPI Viewer
Validate an OpenAPI or Swagger spec and browse its endpoints, parameters and schemas.
HAR Viewer
Open a .har network capture and browse its requests, responses, headers and timings.
Web App Manifest Generator
Generate a PWA web app manifest with a full icon set, install meta tags and an installability check.