14 articles across 7 sub-categories
Smallpdf and ILovePDF are the most popular PDF tools online — but both upload your files to servers, have daily limits, and add watermarks on free tier. Here's how RCInsights compares.
A curated list of the best free online developer tools — all running in your browser, no account needed, no data uploaded. JSON formatter, JWT decoder, regex tester, PDF tools, and more.
PDF and image formats each have clear strengths. Choosing wrong costs you quality, compatibility, or file size. Here's exactly when to use each and how to convert between them.
Most PDF merger tools upload your documents to third-party servers. Here's how to merge PDFs entirely in your browser — no upload, no account, no size limit, no watermark.
Regular expressions are one of the most useful and most avoided tools in a developer's toolkit. This cheat sheet gives you every pattern you'll actually use, plus real examples you can test immediately.
Base64 appears in JWT tokens, API calls, image embedding, and email attachments. Here's how it works, why it exists, and exactly when you should use it as a developer.
JWT tokens are in every modern web application's Authorization header — but most developers just copy-paste the pattern without understanding what's inside. Here's a complete breakdown.
JSON is everywhere in modern web development — APIs, config files, databases. This complete guide teaches you JSON syntax, rules, common mistakes, and practical use cases with examples.
A curated list of the best AI tools for developers in 2026. From intelligent code completion to automated testing, these tools will transform how you write, debug, and ship code.
A complete guide to installing Docker on Ubuntu, macOS, and Windows. Learn Docker Engine setup, Docker Compose, essential commands, and best practices for containerized development.
A complete beginner-friendly guide to installing Ubuntu 24.04 LTS on your computer. From downloading the ISO to post-install setup, everything you need to get started with Linux.
Node.js or Spring Boot? This comprehensive comparison covers performance, scalability, ecosystem, learning curve, and real-world use cases to help you choose the right backend framework.
Master the fundamentals of system design. Learn about scalability, load balancing, caching, databases, CDNs, message queues, and more with practical examples and clear diagrams.
The ultimate list of VS Code extensions for 2026. Boost your productivity with AI assistants, Git tools, code formatters, themes, and language-specific extensions that every developer should install.