Deep dives into tools,
techniques & the web.
Practical guides covering developer tools, health metrics, SEO, converters and more — written to be actually useful.
✦ AI-powered — understands natural language
The 300-Year Unbreakable Cipher That Got Broken — Vigenère, Enigma, and What Every "Unbreakable" Cipher Has in Common
The Electromagnetic Spectrum: Why 5G, WiFi, X-Rays, and Radio Waves Are All the Same Thing
Radio waves, WiFi, visible light, X-rays, and gamma rays are all the same phenomenon at different frequencies. Here's the full electromagnetic spectrum, why 5G uses higher frequencies than 4G, what WiFi bands mean, and why ionising radiation is dangerous when radio waves aren't.
JSON vs YAML vs MessagePack vs Protocol Buffers: Which Format for Which Use Case
JSON has no comments, no date type, and a number precision problem that caused Twitter to change their API. Here's how JSON compares to XML, YAML, MessagePack, and Protocol Buffers, when each format makes sense, and what JSON Schema adds.
The World's Strangest Timezones — and the Politics Behind Every Unusual Offset
India's UTC+5:30 and Nepal's UTC+5:45 exist for political reasons, not geographic ones. China has one timezone across a continent. Samoa changed date line sides for economic reasons. Here's the politics and history behind the world's strangest timezone decisions.
Height Conversion and What Your Height Actually Reflects About Health
Height is more than a number — it reflects childhood nutrition, genetics, and health system quality across generations. Here's the full conversion reference, what drives global height variation, and why measured height matters for health calculations.
Internal Linking Strategy: How to Distribute PageRank Effectively Across Your Site
Most internal linking patterns developed accidentally, not by design. Here's how PageRank flows through internal links, the hub-and-spoke model, how to find underlinked important pages, and anchor text strategy for distributing authority effectively.
International SEO Beyond Hreflang: URL Structure, Content Localisation, and Local Links
Hreflang solves one problem in international SEO — the rest depends on URL structure choice, genuine content localisation vs. translation, and local link building. Here's the complete international SEO framework that hreflang fits into.
Site Migration SEO: The Redirect Mistakes That Cost Rankings and How to Avoid Them
Site migrations lose SEO value in predictable ways: homepage redirects, redirect chains, and missing redirects for high-value pages. Here's the complete pre-migration checklist, how to preserve link equity through domain changes, and post-migration monitoring.
Domain Due Diligence: Using WHOIS for SEO Research, Vendor Vetting, and Expiry Monitoring
WHOIS records reveal domain age, ownership history, expiry dates, and registration patterns that matter for SEO domain research, vendor due diligence, and operational monitoring — not just availability checking.
Shannon Entropy and Character Frequency: The Information Theory Behind Text Analysis
Character frequency analysis connects directly to Shannon entropy, data compression, and information theory. Here's what the distribution of characters in text reveals about compressibility, password strength, Zipf's Law, and stylometric authorship analysis.
Beyond Keyword Density: TF-IDF and How Search Engines Actually Measure Topic Relevance
Raw keyword density is an outdated metric. TF-IDF is more useful. Neither is as important as comprehensive topical coverage with natural language. Here's how search engines actually measure relevance and what keyword density tools are actually good for.
Readability Scores Explained: What Flesch-Kincaid Measures — and What It Misses
Readability scores measure sentence length and syllable count — not vocabulary familiarity, coherence, or domain knowledge. Here's how Flesch-Kincaid, Gunning Fog, and SMOG actually work, what they miss, and when they're genuinely useful as diagnostic tools.
Writing Alt Text That Works for Both SEO and Accessibility
Alt text that works for both screen readers and SEO follows specific principles: contextual relevance, appropriate keyword inclusion without stuffing, and different approaches for different image types. Here's the craft behind writing alt text that does both jobs well.
