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
URL Encoder/Decoder — Percent-Encode & Decode URLs Instantly
Learn why URL encoding exists, how percent-encoding works, the difference between %20 and + for spaces, and how to encode and decode URLs correctly for APIs and query strings.
Water Intake Calculator — Find Your Personalised Daily Hydration Target
Learn how daily water intake needs are calculated, why the 8-glasses rule falls short, how climate and activity affect hydration, and how to use a free water intake calculator for a personalised target.
DNS Lookup — Query Any Record Type for Any Domain Instantly
Learn how DNS works, what record types mean (A, MX, TXT, CNAME, NS), how to diagnose common DNS problems, and how to use a free DNS lookup tool to check any domain's records.
Text Truncator — Shorten Any Text to a Set Character or Word Limit
Learn how smart text truncation works, why word boundary cuts matter, how to account for ellipsis length, and how to use a free text truncator for meta descriptions, database fields, and notification previews.
MX Lookup — Check Any Domain's Mail Server Records Instantly
Learn how MX records work, what mail server priorities mean, how to read common configurations for Google Workspace and Microsoft 365, and how to use a free MX lookup tool to diagnose email routing.
Image Alt Checker — Find Every Missing Alt Text on Any Web Page
Learn what image alt text does for SEO and accessibility, what good alt text looks like, and how to use a free image alt checker to find all missing or inadequate alt text on any web page.
Hreflang Generator — Create Correct International SEO Tags Instantly
Learn how hreflang tags work, the strict bidirectionality rules, language and region code formats, and how to use a free hreflang generator to target the right content to the right international audience.
Whitespace Cleaner — Remove Invisible Characters & Normalise Any Text
Learn what causes whitespace problems in text — non-breaking spaces, zero-width characters, BOM markers, mixed line endings — and how to use a free whitespace cleaner to normalise any text instantly.
REST API Checker — Test Any REST API Instantly in Your Browser
Learn how to test REST APIs directly in your browser — send GET, POST, PUT, and DELETE requests, add auth headers, inspect responses, and debug API issues without installing any tools.
BMI Calculator — Body Mass Index Explained & What Your Number Means
Learn how BMI is calculated, what the categories mean, why it has limitations for muscle, fat distribution, and ethnicity, and how to use a free BMI calculator as part of a broader health picture.
Port Scanner — Check Open Ports & Verify Server Security Configuration
Learn how port scanning works, what common port numbers mean, how to identify dangerous open ports, and how to use a free port scanner to verify your server's security posture.
Power Converter — Watts, kW, Horsepower & BTU/hr Explained
Learn how power units like watts, kilowatts, horsepower, BTU/hr, and tonnes of refrigeration relate to each other — with real examples for generators, AC units, car engines, and solar panels.
