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Guides on source code, SEO & web analysis
Practical, evidence-based write-ups on reading HTML, auditing pages, checking security headers, and understanding the web. No fluff — just what to look at and why.
What Is HTML Source Code? A Beginner's Guide
A plain-English explanation of HTML source code: how a browser turns markup into a rendered page, how source differs from the DOM, and what you can learn by reading a site's HTML.
Read the guide →How to View Source Code on Mobile: iPhone & Android
Mobile browsers removed the view-source: command. Here is why, which workarounds fail, and how to reliably read, search, and copy a page's HTML on iPhone and Android.
May 19, 2026How to View Page Source in Any Browser (And on Mobile)
Learn how to view page source in Chrome, Firefox, Edge, and Safari using view-source:, right-click, and keyboard shortcuts — plus the mobile workaround when the command is missing.
May 12, 2026How to Detect What Technologies a Website Uses
Understand the evidence behind website technology detection: response headers, cookies, generator meta tags, HTML markup patterns, asset URL paths, and CDN headers. Worked examples for WordPress, Next.js, React, and Cloudflare.
February 12, 2026HTTP Security Headers Explained (With Grades and Fixes)
What each HTTP security header does, the risk of leaving it out, and the exact value to add. Includes HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, cookie flags, and how a header grader scores a site from A+ to F.
February 7, 2026On-Page SEO Audit Checklist: 15 Things to Check in a Page's Source
A practical 15-point on-page SEO audit you can run by reading raw HTML. Covers title tags, meta descriptions, headings, canonical, robots, Open Graph, Twitter Cards, JSON-LD, hreflang, alt text, links, viewport, charset, and page weight.
February 3, 2026Try the tool while you read
Paste any URL to read its source, audit its SEO, and check its security headers.