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
HTML Entities — Encode & Decode Special Characters Correctly
Learn what HTML entities are, which characters always need encoding, how to use <, &, , and special symbols correctly — with a free HTML entities encoder/decoder tool.
Percentage Calculator — Solve Any Percentage Problem Instantly
Learn the three core percentage calculations — find a percentage, calculate what percent one number is of another, and find percentage change — with real examples and a free calculator.
Subnet Calculator — IPv4 & IPv6 Network Address, Host Range & CIDR
Learn how IPv4 subnetting works, what CIDR notation means, how to calculate network addresses, host ranges, and usable hosts, with real examples — plus an IPv6 intro and a free subnet calculator.
Steps to Calories Calculator — Find Out What Your Daily Steps Are Burning
Learn how step count converts to calories burned, where the 10,000 steps target came from, how walking compares to other exercise, and how to use a free steps-to-calories calculator based on your weight.
DMARC Lookup — Check Your Domain's Email Policy & Anti-Spoofing Protection
Learn how DMARC works, what the none/quarantine/reject policies mean, how to read a DMARC record, and how to use a free DMARC lookup to diagnose email authentication and spoofing protection.
Loan Planner — Full Repayment Schedule & Amortisation Table
Learn how a loan planner builds your full amortisation schedule, shows the interest-to-principal split every month, and helps you plan prepayments to save money on any loan.
Inflation Calculator — What Is Your Money Actually Worth?
Learn how inflation erodes purchasing power over time, what inflation rate to use for financial planning, and how to use a free inflation calculator to set realistic savings and retirement goals.
FD Calculator — Calculate Fixed Deposit Maturity Amount & Interest
Learn how fixed deposit interest is calculated, what affects your maturity amount, and how to use a free FD calculator to compare tenures and rates before you invest.
EMI Calculator — Work Out Your Monthly Loan Payment Instantly
Learn how EMI is calculated, what affects your monthly loan payment, and how to use a free EMI calculator to plan home loans, car loans, and personal loans with real examples.
SSL Checker — Verify Certificate Validity, Expiry & Chain Instantly
Learn how SSL certificates work, what DV/OV/EV and wildcard certificates mean, how to read SSL checker results, and how to catch certificate expiry before users see browser security warnings.
BIMI Lookup — Check Your Domain's Email Brand Logo Configuration
Learn what BIMI is, how it works alongside DMARC and DKIM to display brand logos in email inboxes, what a BIMI lookup reveals, and how to implement it for your domain.
Blacklist Checker — Is Your IP or Domain on a Spam Blacklist?
Learn how email spam blacklists work, why you might get listed, how to check if your IP or domain is on a blacklist, and how to get removed from the major DNSBLs.
