How to Build a Browser-Based PDF Rotator Using JavaScript
Sometimes PDF pages appear upside down, sideways, or in the wrong orientation after scanning or exporting documents. Instead of re-creating the document...
Bhavin Sheth - freecodecamp
Development
UX
How CAPTCHAs Affect Accessibility: Problems, Workarounds, and Alternatives
CAPTCHAs – or the “I am not a robot” challenges – were originally designed to separate humans from bots. It started with deciphering some distorted text, then...
Ilknur Eren - freecodecamp
Algorithmic Theming Engines: Building Self-Correcting Color Systems With `contrast-color()`
Seventy percent of websites still fail basic WCAG contrast checks in 2025. After years of design system tooling, accessibility linters, and JavaScript libraries, nothing moved the...
Durgesh Pawar - smashingmagazine
Security
Production RAG with LangChain & Vector Databases
Master the transition from simple prototypes to production-grade RAG systems by addressing the critical scaling, debugging, and security challenges that...
Beau Carnes - freecodecamp
Top 5 Proxy Providers for Developers
Developers today build software in a world where the internet is fragmented. Websites change content based on geography. APIs introduce rate limits. Security...
Manish Shivanandhan - freecodecamp
Other
GDPR Article 32 for Software Engineers: Technical Controls, Implementations, and Auditor Questions
When I first read GDPR Article 32, I made a mistake. I thought it was a legal document. But it's not. It's an infrastructure specification. The regulation...
Ayobami Adejumo - freecodecamp
RAG Explained Simply with a Real Project
If you have used ChatGPT, you know how magical it feels. You ask a question, and it instantly generates a highly articulate answer. But you also probably know...
Ashutosh Krishna - freecodecamp
Advanced Error Handling in Dart: Records, Result Types, Monads, and Freezed Exceptions
Every Dart developer has written this at some point: try { final user = await repository.getUser(id); // do something with user } catch (e) { // what is...
Oluwaseyi Fatunmole - freecodecamp
AI Paper Review: GPT-4 Technical Report (GPT-4)
When GPT-3 was released in 2020, it completely changed how people thought about language models. It showed that a sufficiently large neural network could...
Mohammed Fahd Abrah - freecodecamp
How to Use Bash & Python for Real DevOps Automation – Full Handbook with 5 Production Use Cases
Automation scripts often validate process completion instead of system health. A Kubernetes pod can be running while the application inside it can't...
Osomudeya Zudonu - freecodecamp
How to Build AI Apps in the Browser with TensorFlow.js and WebGPU
Most developers think of AI the same way: you send data to a server, the server thinks, you get a response back. That mental model made sense for a long time....
Ayantunji Timilehin - freecodecamp
Your Prototype Is Not Being Honest With Your Users (And Here’s How To Fix It)
There’s a moment in almost every usability session where a participant pauses at the login screen, types something, and glances up: checking whether they’re “doing it right.” That...
Eric Joseph L. - smashingmagazine