Base64 Explained, and Why It Is Not Security
How Base64 works, data URIs and JWTs, why decoding fails, the URL-safe variant, and the one misconception that…
Haris Naseer
Collection
Tools Guide
In-depth guides to free online tools — what they do, why they matter, and how to use them like a pro.
33Articles in this collection
91Articles site-wide
Aug 2026Last updated
100%Free to read
Haris Naseer
Text Case: Title Case, camelCase and snake_case
The actual rules of Title Case, why big publications switched to sentence case, where each developer case belongs,…
Haris Naseer
Days Between Dates and the Off-by-One Trap
Why Monday to Friday is both 4 and 5 days, how visa day-counting really works, calendar vs working…
Haris Naseer
Percentages Made Simple: 4 Patterns and 3 Traps
Every percentage question is one of four patterns. Learn them, dodge the reversal and stacked-discount traps, and get…
Haris Naseer
BMI Explained: What It Means and When It Lies
What BMI actually measures, the WHO ranges, where the number misleads athletes and older adults, and how to…
Haris Naseer
PNG vs JPG vs WebP vs HEIC — Which Format, When
What each image format is actually for, the four conversions everyone needs, why browser-based converting beats upload sites,…
Haris Naseer
Open Graph: Make Every Shared Link Look Right
How Open Graph works, the 1200×630 image rule, Twitter cards, fixing stale previews, and the free generator that…
Haris Naseer
XML Sitemaps — Get Every Page Found and Indexed
What sitemaps fix (and what they cannot), the tags Google actually reads, hygiene rules, best generators compared, and…
Haris Naseer
Robots.txt: Block AI Bots, Avoid the Killer Slash
How robots.txt works line by line, the typo that deindexes sites, whether to block GPTBot and friends, and…
Haris Naseer
Meta Tags That Win the Click
Which meta tags matter in 2026, exact length rules for titles and descriptions, why Google rewrites yours, and…
Haris Naseer
Keyword Density: The Sweet Spot and the Myths
What keyword density actually does in modern SEO, the realistic 0.5–2% range, why phrase analysis beats word counts,…
Haris Naseer
Turn One Seed Keyword Into 50 Post Ideas, Free
How keyword research works, why long-tails beat head terms for new sites, free vs paid tools compared, and…
Haris Naseer
Unit Conversion Without the Mistakes
Why metric vs imperial still causes chaos, the conversions everyone needs, a $327M cautionary tale, and the fastest…
Haris Naseer
Word Count: The Ideal Length for Everything You Write
The exact character and word limits for Google, X, LinkedIn, essays and emails — plus how reading time…
Haris Naseer
Work Out Your Exact Age in Years, Months and Days
Why age math goes wrong, where a one-day error costs real opportunities, the best age calculators compared, and…
Haris Naseer