Website & Performance Tools

Check Google PageSpeed Insights score.

View HTML source code of any webpage.

Check raw HTML size and compression to improve speed and SEO.

Calculate text to code ratio. Get grade and optimization tips.

Estimate server Time To First Byte (TTFB) and analyze backend response speed.

Generate screenshots of websites.

Analyze the ratio of internal pages, discover crawl depth, and detect structural SEO issues.

Analyze CSS load size by checking file weight, compression, and estimated load impact.

Scan a webpage to detect broken CSS, JS, image, and other linked resources.

Measure website loading speed.

Detect broken image URLs on a page.

Analyze DOM size and detect excessive HTML elements that can slow down your website.

Detect render-blocking JavaScript and analyze script execution order.

Visualize internal link structure and page depth of a website.

Analyze a webpage and count HTML tags (headings, links, images, lists, tables) for quick structure insights.

Scan and analyze critical SEO signals on a website homepage.

Detect CSS, JavaScript, and image assets that may not be required on a webpage.

Calculate code vs text ratio on web pages.

Test if website is mobile-friendly.

Analyze how many clicks it takes to reach pages from the homepage and identify deep or buried content.

Detect render-blocking fonts and font loading issues affecting page speed.

Analyze mobile usability signals like viewport, responsive CSS, and layout flexibility.

Detect invalid HTML nesting patterns and common markup mistakes.

Quickly detect common accessibility issues like missing alt text, labels, and heading problems.

Test if website uses Gzip compression.

Detect missing preload, prefetch, and preconnect hints to improve page loading performance.

Detect inline CSS usage and help optimize styles for speed and maintainability.

Analyze homepage content balance: text, links, images, headings, and scripts.

Check whether images on a page use lazy-loading for better performance.

Check total page weight and size.

Generate an overall SEO risk score by analyzing common technical and on-page SEO issues.

Ping website to search engines.

Check if server is up or down.

Look up real-user Core Web Vitals field data from the Chrome UX Report — LCP, INP, CLS, FCP and TTFB at the 75th percentile, with pass/fail assessment.

Validate your Web App Manifest for PWA installability — name, icons (192 & 512), display, start_url, and colors — with a pass/fail checklist. Free.

Check how a page or asset is cached — Cache-Control, Expires, ETag, Last-Modified — with the freshness lifetime in plain English and best-practice fixes. Free.

View every HTTP response header a URL returns — status code, HTTP version, full redirect chain, and notes on caching, compression, and security headers. Free.

Check whether a site supports HTTP/1.1, HTTP/2, and HTTP/3 — see the negotiated version and Alt-Svc h3 advertisement, with performance notes. Free.