Developer Blog
Free guides and tutorials for developers. Learn how the tools you use every day actually work — DNS, JSON, regex, JWT, hashing, image optimization, and more.
24 articles across 7 categories
🌐 Network Tools
📄 Data Formats
What is JSON? Complete Guide with Examples
Learn JSON syntax, data types, formatting, validation, and best practices for APIs.
📖 9 min readUnderstanding Base64 Encoding & Decoding
What Base64 is, how it works, when to use it, and common use cases in web development.
📖 7 min readSQL Formatting Best Practices for Readable Queries
How to write clean, readable SQL with proper formatting, indentation, and naming conventions.
📖 8 min read🔐 Security
Password Security Guide: How to Create & Manage Strong Passwords
Everything you need to know about creating strong passwords, password managers, and 2FA.
📖 10 min readJWT Authentication Explained: How JSON Web Tokens Work
Deep dive into JWT structure, signing algorithms, claims, expiration, and security best practices.
📖 10 min readCryptographic Hash Functions: MD5, SHA-256, SHA-512 Explained
Understand hash functions, their uses in security, and which algorithm to choose for your use case.
📖 9 min read✏️ Text & Code
Regular Expressions (Regex) Beginner's Guide
Learn regex from scratch with practical examples for validation, extraction, and text processing.
📖 12 min readLinux Cron Jobs: Complete Guide to Scheduling Tasks
Learn how to schedule automated tasks on Linux using cron. Covers crontab syntax, expressions, special characters, and real-world examples.
📖 10 min read🖼️ Images & Media
Image Optimization Guide: Compress, Resize & Convert Images
How to optimize images for the web, reduce file sizes, choose the right format, and improve page speed.
📖 8 min readPDF Tools Guide: Merge, Split, Compress & Convert PDFs
Complete guide to working with PDFs — merging, splitting, compressing, and converting to other formats.
📖 7 min read🤖 AI & Machine Learning
Prompt Engineering Guide: Write Better AI Prompts
Learn zero-shot, few-shot, chain-of-thought, and role prompting techniques for GPT-4, Claude, and Gemini with practical templates.
📖 12 min readHow LLMs Work: Tokens, Transformers & Context Explained
Understand tokenization, transformer architecture, attention mechanisms, context windows, and why LLMs hallucinate.
📖 14 min readAI API Comparison 2025: OpenAI vs Claude vs Gemini
Compare GPT-4o, Claude 3.5 Sonnet, and Gemini 1.5 Pro — pricing, context windows, speed, and which to choose for your project.
📖 13 min readWhat is RAG? Retrieval-Augmented Generation Explained
Learn how RAG works — vector databases, embeddings, chunking strategies, and how to build a RAG pipeline from scratch.
📖 12 min readHow to Use the OpenAI API: Complete Beginner Guide 2025
Step-by-step guide covering authentication, chat completions, streaming, function calling, embeddings, and cost management.
📖 15 min readAI Agents Explained: How Autonomous AI Agents Work
Learn the ReAct loop, tool use, memory, multi-agent systems, and how to build your own agent with OpenAI or LangChain.
📖 13 min readFine-Tuning LLMs: When to Fine-Tune vs Prompt Engineer
When fine-tuning makes sense, OpenAI fine-tuning step by step, LoRA, QLoRA, dataset preparation, and cost analysis.
📖 14 min readAI Image Generation Guide: DALL-E, Midjourney & Stable Diffusion
How diffusion models work, DALL-E 3 vs Midjourney vs Stable Diffusion, prompt techniques, and API integration.
📖 12 min readVector Databases Explained: Pinecone, Chroma & pgvector
How vector databases work — embeddings, ANN algorithms, and how to choose between Pinecone, Chroma, Weaviate, and pgvector.
📖 11 min readAI Coding Tools Guide 2025: GitHub Copilot vs Cursor vs Claude
Compare the best AI coding tools — GitHub Copilot, Cursor, Claude, Codeium, and Tabnine with features, pricing, and best practices.
📖 12 min readAI Ethics & Safety: What Every Developer Should Know
Practical guide to AI ethics — bias, hallucination, privacy, prompt injection, responsible deployment, and safety best practices.
📖 13 min read