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
Keyword Density Tool — Analyse Word Frequency & Optimise Your Content
Learn how keyword density works, why density alone isn't a ranking signal, how to use it to find over-optimised content and topical gaps, and how to analyse any page with a free keyword density tool.
Link Extractor — See Every Link on Any Web Page & Audit Your SEO Structure
Learn why links matter for SEO, how anchor text, rel attributes, and internal vs. external links affect rankings, and how to use a free link extractor to audit any page's link structure.
Redirect Mapper — Plan & Audit URL Redirects for Site Migrations
Learn how 301, 302, and other redirect types affect SEO, why redirect chains lose link equity, how to plan a migration redirect map, and how to audit your redirects with a free redirect mapper tool.
SPF Lookup — Check Any Domain's Email Authentication Record
Learn how SPF records work, what the include, ip4, and all mechanisms mean, why the 10-lookup limit matters, and how to use a free SPF lookup tool to diagnose email authentication failures.
Area Converter — Square Feet, Metres, Kathas, Bighas & Acres
Learn how to convert between square feet, square metres, kathas, bighas, decimals, acres, and hectares — with real examples for land buying, construction, and farming in Bangladesh.
RD Goal Calculator — Find the Monthly Deposit to Hit Your Savings Target
Learn how an RD goal calculator works backwards from your savings target to tell you the exact monthly deposit needed, with real examples for vacations, down payments, and emergency funds.
RD Calculator — Calculate Your Recurring Deposit Maturity Amount
Learn how recurring deposit interest is calculated, how an RD compares to an FD or SIP, and use a free RD calculator to find your exact maturity amount before opening an account.
Robots.txt Generator — Create Crawler Access Rules for Any Website
Learn how robots.txt works, the difference between disallowing crawling vs. preventing indexing, common mistakes to avoid, and how to generate a correct robots.txt file for any site with a free tool.
Age Calculator — Find Your Exact Age in Years, Months & Days
Learn how an age calculator works, why exact age in months and days matters for medical, legal, and insurance contexts, and how to calculate age precisely between any two dates.
NS Lookup — Find the Authoritative Nameservers for Any Domain
Learn what NS records are, how DNS delegation works, why NS records are the first thing to check when DNS fails, and how to use a free NS lookup tool to verify nameserver configuration.
Reverse DNS Lookup — Translate Any IP Address to Its Hostname
Learn how reverse DNS works, what PTR records reveal about IP addresses, why forward-confirmed reverse DNS matters for email, and how to use a free reverse DNS lookup for security and diagnostics.
Retirement Calculator — Find Your Target Corpus & Monthly Savings
Learn how a retirement calculator works, what corpus you actually need, and how inflation and longevity affect your plan — with real examples at different life stages and a free calculator to find your number.
