CGPA Calculator Hash Generator Bcrypt Hasher Tree Visualizer Barcode Generator Engineering Blog Editorial Standards All Tools Games HTML5 JavaScript PHP MySQL

Developer Tools & Computational Utilities

Verified algorithms, standards-compliant security tools, and interactive utilities engineered for software developers, students, and engineers.

4.00 Scale & Points
CGPA Calculator
Calculate cumulative grade points instantly with multi-semester weighting and standard 4.00 grading scale tables.
NIST Vectors (SHA/MD5)
Hash Generator
Generate and verify SHA-256, SHA-512, MD5, and SHA-1 checksums with cryptographic property breakdowns.
Work Factors 10–14
Bcrypt Hasher & Benchmark
Generate secure bcrypt password hashes, evaluate GPU cracking resistance, and benchmark server CPU latency.
BST Invariant & Traversal
Binary Tree Visualizer
Interactive HTML5 canvas simulator for BST insertions, deletions, balancing, and In-Order/Pre-Order traversals.
Vector SVG & PDF Export
Barcode Generator
Generate industrial Code 128, EAN-13, UPC-A, and Code 39 barcodes with real-time Modulo 10 check digit verification.
Markdown Renderer
README.md Viewer
Render, format, and preview GitHub-flavored Markdown files directly in your web browser.
Exact Formulas
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin with bidirectional precision.
Bilingual Lexicon
English-Bangla Vocabulary
Search and explore curated English to Bengali word translations, definitions, and contextual examples.
View Complete Developer Tool Suite →

Engineering Articles & Technical Analyses

Deep-dive architecture breakdowns, security trade-offs, algorithm proofs, and engineering decisions behind RedoHub tools.

Cryptography & Security

Why RedoHub's Hash Tool Uses Server APIs Instead of Pure Browser Hashing

Why bcrypt's CPU workload requires backend execution, why the tool defaults to bcrypt over MD5, and defensive coding against replay attacks.

Read Full Analysis →
Computer Science

Canvas Redraw Mechanics & Invariant Balancing in Binary Trees

Full-canvas redraw loops vs incremental DOM trees, trigonometric branch edge calculations, and what the Balance button actually rebuilds.

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Architecture

Why the CGPA Calculator Runs 100% Client-Side with Zero Backend

The mathematical and privacy trade-offs behind keeping student academic calculations entirely in local memory with zero data leakage.

Read Full Analysis →
Engineering Design

Vector Path SVG Rendering vs Hand-Rolled PDF Encoders

How direct SVG rendering eliminates anti-aliasing scan failures in industrial printing, and lessons in maintaining legacy label pipelines.

Read Full Analysis →
Explore All Engineering Articles →

Interactive Simulators & Games

Hands-on visual algorithm simulators and classic interactive web games developed in modern JavaScript.

Tree Visualizer
BST Simulator
🐍
Snake Game
Classic Arcade
Tetris
Block Puzzle
Bird Hunter
Target Reflex
Ludo
Board Strategy
View All Games →

Programming Reference & Guides

Structured syntax reference guides for core web technologies and database systems.

HTML5
Semantic structure and document markup fundamentals.
CSS3
Responsive layouts, Flexbox, Grid, and modern styling.
Bootstrap 5
Component architecture and mobile-first layouts.
JavaScript
Modern ES6+ syntax, DOM manipulation, and asynchronous patterns.
jQuery
Event delegation, DOM querying, and AJAX requests.
MySQL
Relational schema design, indexes, and SQL querying.
PHP
Backend scripting, server architecture, and sessions.
Data Mining
Statistical metrics, clustering, and pattern mining.
Tutorials
HTML CSS Bootstrap JavaScript jQuery MySQL PHP Data Mining
Tools
CGPA Calculator Hash Generator Binary Tree Simulator Bcrypt Generator Barcode Generator README.md Viewer ABC Learning Fun Unit Converters English-Bangla Vocabulary BMI Calculator HTML Previewer
Games
Snake Bird Hunter Tetris Ludo
RedoHub
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