HTTP tools

Hreflang validator

Find every <link rel="alternate" hreflang="…"> on a page and validate it.

HTTP headers

Capture every response header, follow redirects, time each hop.

OpenGraph & Twitter Card preview

Preview how your URL looks when shared on Facebook, Twitter, LinkedIn, Slack.

Page weight & timing

Real-network fetch with full timing breakdown — DNS / connect / TLS / TTFB / total / payload size / compression.

Redirect chain tracer

Step-by-step view of every redirect with status, latency and location.

robots.txt parser

Fetch and parse robots.txt — User-agent groups, Disallow/Allow, Sitemap, Crawl-delay.

Schema.org validator

Pull JSON-LD blocks from a page and validate the @type / required fields.

Security headers grader

A+ to F grade for HSTS, CSP, X-Frame-Options, COOP, Referrer-Policy and more.

sitemap.xml inspector

Fetch and parse sitemap or sitemap-index, list URLs with lastmod, priority.

HTTP status check

Quick, single-shot status code + content-type for any URL.

Tech stack detector

CMS, framework, server, CDN, analytics fingerprints.

URL inspector (GSC-style)

Indexability, canonical, robots, hreflang, schema, security — all in one.

.well-known inspector

Probe RFC 8615 .well-known files: security.txt, change-password, openid, mta-sts, etc.