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
Your List Still Has Duplicates After Removing Duplicates
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.
Angle Converter — Degrees, Radians, Gradians & More Explained
Learn the difference between degrees, radians, gradians, arcminutes, and arcseconds, when each is used, and how to convert between them instantly with a free angle converter.
Simple Interest Calculator — Formula, Examples & When to Use It
Learn how simple interest works, how it compares to compound interest, and when it's still used in loans and savings — with the formula, worked examples, and a free calculator.
Tax Calculator — Calculate Your Income Tax Liability Instantly
Learn how income tax is calculated using progressive slabs, which deductions reduce your liability, and how to use a free tax calculator to find your exact tax amount before filing.
