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Website intelligence tools, free forever.
A dozen-plus tools for SEO, competitive research, and web monitoring. No account required - just paste a URL and go.
Website Change Checker
Check whether a web page has changed since your last visit. Fingerprints the content now, then flags any change next time you check.
Uptime Checker
Check if any website is online right now. Returns HTTP status, response time, and final URL after redirects.
Meta Tag Analyzer
Inspect title, description, Open Graph, Twitter Card, canonical, and robots tags for any URL.
Redirect Chain Checker
Follow every redirect hop for a URL. Spot redirect loops, mixed HTTP/HTTPS chains, and too-many-hops issues.
Robots.txt Checker
Fetch and parse robots.txt for any domain. See allow/disallow rules per user-agent and sitemap directives.
Sitemap Viewer
Find and explore the XML sitemap for any domain. View all indexed URLs with lastmod dates and priority scores.
HTTP Header Checker
Inspect all HTTP response headers for any URL. Security headers, caching directives, and server info highlighted.
HTML / Text Diff
Paste two versions of any text or HTML and see exactly what changed - line by line, additions and removals.
Page Word Count & Readability
Fetch any URL and get word count, sentence count, reading time, Flesch score, and page structure breakdown.
Title & Meta Description Length
Check your title tag and meta description by character and pixel width, with a live Google SERP preview showing where they truncate.
XML to CSV / Excel
Convert any XML file to a clean CSV or Excel spreadsheet. Paste or upload, preview the table, and download. Runs in your browser, nothing is uploaded.
Tech Stack Checker
See what any website is built with: CMS, JavaScript framework, ecommerce platform, analytics, hosting and CDN. Great for competitor research.
Broken Link Checker
Scan any page for broken links, images, scripts and stylesheets. See the exact HTTP status of every 404 before your visitors do.
SSL & Domain Expiry Checker
Check a site's SSL certificate (issuer, validity, expiry) and its domain registration, registrar and nameservers so nothing lapses unnoticed.
Schema Markup Generator & Validator
Generate valid Schema.org JSON-LD for six common types, then validate any markup by paste or live URL.
Open Graph & Social Preview
See how any URL looks when shared on Facebook, LinkedIn and X, and find missing social tags.
Robots.txt Generator
Build a valid robots.txt with presets for allow all, block all, WordPress and Shopify, plus custom user-agent groups, crawl-delay and sitemaps.
XML Sitemap Generator
Crawl a site and build a valid sitemap.xml you can copy or download.
Want to monitor pages automatically?
These tools check once. SiteGauge watches continuously - and alerts you the moment something meaningful changes.