Sk Md Rakib — Founder & Developer, G4GAME
Sk Md Rakib is the founder of G4GAME and the developer behind G4GAME DevTools, a free suite of privacy-first developer utilities that run entirely in the browser. He built the platform after years of frustration with developer tools that processed user input on remote servers, usually with no clear privacy policy and no way to verify whether inputs were logged or retained.
His engineering work focuses on client-side web applications that solve real developer problems without requiring accounts, without collecting user data, and without hidden costs. G4GAME DevTools is his flagship project and has grown from five tools at launch to 19 tools and a library of original technical guides.
He writes every guide published on this site and reviews every tool page before it goes live, testing tool behaviour in current versions of Chrome, Firefox and Safari. Corrections and technical questions are welcome and answered personally.
Contact: hello@toolbyg4game.com
// Articles by Sk Md Rakib
- Why client-side developer tools are safer than online converters
· 7 min read
A practical explanation of what happens to your data in server-based online converters, why client-side tools remove that risk, and how to verify a tool never uploads your input.
- The practical guide to reading, formatting and debugging JSON
· 8 min read
How JSON actually breaks in real projects, how to read parser error messages by line and column, and a repeatable workflow for turning an unreadable API response into something you can debug.
- Understanding JWTs: structure, claims, and how to inspect one safely
· 8 min read
What the three parts of a JSON Web Token contain, which claims matter in practice, why decoding is not verification, and how to inspect a token without leaking a live session.
- How to choose a strong password (and why length beats symbols)
· 7 min read
Entropy explained without maths jargon: why passphrases outperform complex short passwords, how cracking speed changes the arithmetic, and where password generators fit.
- UUID v1, v4 and v7: which identifier should you actually use?
· 7 min read
The differences between UUID versions that matter in production: collision risk, database index behaviour, sortability, and when a UUID is the wrong choice entirely.
- How to validate JSON in JavaScript (5 methods)
· 8 min read
Five ways to validate JSON in JavaScript, from a try-catch one-liner to Ajv schema validation and streaming parsers — with guidance on which to use when.
- What is Base64 encoding and when should you use it?
· 7 min read
Base64 explained from first principles: what it does, what it definitely does not do, standard versus URL-safe alphabets, and the cases where it is the wrong tool.
- Understanding HTTP status codes for API developers
· 9 min read
Which status code to return and what each one means when you receive it — 2xx, 3xx, 4xx and 5xx explained with the API design decisions that depend on them.
- How to generate secure random secrets in Node.js
· 8 min read
How to produce API keys, session secrets and tokens in Node.js using crypto.randomBytes — how much entropy you need, which encoding to pick, and the mistakes that quietly ruin it.
- SQL formatting best practices for readable queries
· 7 min read
Formatting conventions that make SQL reviewable and debuggable: keyword casing, explicit joins, table aliases, one condition per line, and how to enforce them consistently.
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