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Practical guides, tutorials, and tips on JSON formatting, Base64 encoding, regex, password security, and everyday developer tools.
GST Calculator Guide for Indian Businesses (CGST, SGST, IGST)
Master GST calculation in India: CGST, SGST, IGST, all 7 slabs, registration thresholds, ITC, e-invoicing, and HSN codes with worked INR examples for 2025-26.
Old vs New Tax Regime FY 2025-26 — Which Saves More?
Compare old and new income tax regimes for FY 2025-26 with Budget 2025 slabs, Section 87A rebate up to Rs 12L, deductions, break-even points, and worked examples.
How to Calculate Age Exactly: Years, Months, Days, and Beyond
Learn the exact way to calculate age in years, months, and days. Covers leap years, Feb 29 birthdays, Indian government rules, school cut-offs, and JS code samples.
BMI Explained for Indians — Why Standard BMI Charts May Mislead You
Understand BMI for Indians: WHO vs ICMR cutoffs, South Asian phenotype, waist circumference, body fat, and why standard BMI charts mislead Indian bodies in 2026.
How to Calculate Days Between Dates — Complete Guide
Learn how to calculate days between dates accurately using formulas, code, and online tools. Covers leap years, timezones, business days, and pitfalls.
How to Compress Images Without Losing Quality (2026 Guide)
Master image compression in 2026. Learn JPEG, PNG, WebP, AVIF formats, quality settings, batch workflows, and how to shrink file size without visible loss.
How to Merge, Split, and Compress PDFs Online — Complete Guide
Master PDF manipulation in 2026. Learn how to merge, split, and compress PDFs online with privacy, speed, and zero quality loss. Free tools and pro tips inside.
HTTP Status Codes: Complete Guide for Developers (2026)
Master every HTTP status code from 100 to 599. Learn when to use each code, real examples, common mistakes, and deep dives on 301 vs 302 and 401 vs 403.
What is a REST API? Complete Beginner's Guide (2026)
Learn what a REST API is, how it works, and how to design one. Covers Fielding's 6 constraints, HTTP verbs, resources, auth, versioning, and real Stripe/GitHub examples.
HTTP Methods Explained: GET, POST, PUT, DELETE, PATCH
Master every HTTP method. Learn GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS, CONNECT, TRACE with idempotency, safety, real code examples, and when to use each.
CORS Explained: Complete Guide to Cross-Origin Resource Sharing
Understand CORS from first principles: Same-Origin Policy, preflight requests, every CORS header, common errors, and framework fixes. With real code examples.
HTTPS vs HTTP: Why HTTPS Matters in 2026
HTTPS vs HTTP compared in depth. Learn TLS handshakes, certificates, HSTS, HTTP/2, HTTP/3, Let's Encrypt setup, SEO impact, and how to avoid common mistakes.
GraphQL vs REST API: Which Should You Use in 2026?
GraphQL vs REST API compared in depth: schemas, caching, performance, versioning, and real-world use cases to help you pick the right API style in 2026.
JSON Schema Explained: Complete Guide with Examples
Master JSON Schema with this complete 2026 guide: drafts, types, validation keywords, $ref, conditionals, formats, real API examples, and Ajv code.
CSV vs JSON vs XML: Complete Data Format Comparison
CSV vs JSON vs XML compared in full: syntax, file size, parsing speed, schema support, tooling, and when to pick each format for your data pipeline.
UTF-8 vs UTF-16 vs ASCII: Character Encoding Explained
UTF-8 vs UTF-16 vs ASCII explained clearly: Unicode code points, byte-level examples, emoji handling, BOM, mojibake, and code in JavaScript and Python.
localStorage vs sessionStorage vs Cookies: Which to Use?
localStorage vs sessionStorage vs cookies compared: storage limits, lifetime, security, SameSite, HttpOnly, XSS, CSRF, and when to use each in 2026.
OAuth vs JWT vs API Keys: Which to Use for API Auth?
OAuth vs JWT vs API Keys compared: when to use each, code examples, security tradeoffs, and a decision tree for choosing the right API authentication.
What is a Webhook? Complete Guide with Examples (2026)
What is a webhook? Complete 2026 guide with code examples, security (HMAC), retry logic, and real-world patterns from Stripe, GitHub, and Slack.
Unix Timestamp Explained: Epoch Time Guide for Developers
Unix timestamp and epoch time explained: conversions in JavaScript, Python, SQL, the Year 2038 problem, timezone pitfalls, and best practices for developers.
SQL vs NoSQL: Which Database Should You Choose in 2026?
SQL vs NoSQL in 2026: a senior engineer's guide to relational vs document, key-value, column, and graph databases with real-world examples and decision criteria.
API Security Best Practices (2026): OWASP Top 10, Auth, Rate Limiting
Production-grade API security for 2026: OWASP API Top 10, JWT/OAuth/mTLS, Zod validation, token-bucket rate limiting, TLS 1.3, CSP, secret management, and monitoring.
Word Count SEO Guide 2026: What Studies Say About Content Length
Data-backed word count guide — Backlinko, HubSpot, SEMrush studies on ideal length, E-E-A-T, search intent, featured snippets, and how to measure content performance.
Hash Functions Explained: MD5, SHA-256, bcrypt, Argon2 (2026)
Hash functions explained for developers: properties, MD5 and SHA-1 collision history, SHA-2/SHA-3/BLAKE3, bcrypt vs Argon2, HMAC, salting, and Web Crypto code.
Markdown Cheat Sheet 2026: CommonMark, GFM, and Every Syntax You Need
The complete Markdown cheat sheet: CommonMark spec, GitHub Flavored Markdown extensions, tables, task lists, footnotes, code fences, and rendering differences across platforms.
QR Codes for Business (2026): Complete Guide with Real Examples
Complete QR code guide for businesses: technical foundations, types, error correction, dynamic tracking, marketing case studies, quishing risks, and design best practices.
Git Diff Explained 2026: Master Code Reviews and Change Analysis
Complete git diff guide — working tree vs staging, reading +/- hunks, two-dot vs three-dot ranges, --word-diff, difftool, and code review workflows on GitHub and GitLab.
JWT Tokens Explained: Structure, Security, and Best Practices (2026)
JWT tokens demystified for developers: header/payload/signature anatomy, HS256 vs RS256, refresh tokens, alg:none and other attacks, and secure storage patterns.
URL Encoding Explained: RFC 3986, Percent-Encoding, and encodeURIComponent
URL encoding deep dive: RFC 3986 reserved vs unreserved characters, percent-encoding algorithm, encodeURI vs encodeURIComponent, double-encoding pitfalls, and server-side APIs.
JavaScript Regex Tutorial 2026: RegExp, matchAll, Named Groups, Unicode
The complete JavaScript regex guide — RegExp vs literals, test(), exec(), matchAll(), named groups, lookbehind, u/y/d flags, performance tips, and production validation patterns.
JSON vs XML in 2026: Performance, Security, and When to Use Each
Deep JSON vs XML comparison: syntax, parsing speed benchmarks, payload size, XXE security, JSON Schema vs XSD, SOAP vs REST, and migration strategies for real projects.
camelCase vs snake_case: The Definitive 2026 Naming Conventions Guide
camelCase vs snake_case vs PascalCase vs kebab-case — history, language-specific conventions, API design, database columns, acronym handling, and tooling for consistent naming.
Regex for Beginners: The Complete 2026 Guide with Real Examples
Master regular expressions from zero — character classes, quantifiers, anchors, groups, lookarounds, flags, and 15+ production-ready patterns for email, URL, password, and date validation.
How to Create a Strong Password in 2026 (NIST-Backed Guide)
Create strong passwords backed by NIST SP 800-63B: entropy math, passphrases, password managers, 2FA, and breach response. Evidence-based security for 2026.
Base64 Encoding Explained: Algorithm, Use Cases, and Pitfalls
Deep dive into Base64: the full encoding algorithm, character set, padding rules, URL-safe variant, JWT and data URI use cases, 33% size overhead math, and security myths.
How to Format JSON Online: Complete Developer Guide for 2026
Format JSON online securely in your browser. Complete guide covering RFC 8259, tree view, validation, large file handling, JSON5, and security pitfalls for developers.