When troubleshooting server issues, I often need to look up which service runs on which port. Online references are either incomplete or poorly for…
Building a Placeholder Image Generator with Canvas API: From Basics to Performance
As a frontend developer, I often need placeholder images: design assets aren’t ready, images are missing, or I’m building a quick prototype. I used…
Percentage Calculator: JavaScript Floating-Point Precision Traps and Solutions
Last week a colleague asked me: “Why doesn’t 0.1 + 0.2 equal 0.3?” I smiled, thinking it was just that classic floating-point issue. But when I…
PDF Merge and Split: A Complete Guide to Implementation and File Format
PDF is one of the most common document formats in our daily work. Whether it’s contract archiving, report organization, or document distribution, P…
Password Strength Checkers: From Character Sets to Entropy Calculation
Ever wondered how those “Password Strength: Strong” indicators work? Why do some sites require uppercase, lowercase, numbers, and special character…
Security Pitfalls in Password Generators: From Math.random to crypto.getRandomValues
I was building a password generator tool recently and discovered that many online implementations have serious security flaws. What seems like a si…
Browser-Side OCR with Tesseract.js: A WebAssembly Text Recognition Journey
I recently needed to add image-to-text functionality to a project. Instead of calling a backend OCR API, I decided to go with a pure frontend solut…
Number Sequence Generator: From Fibonacci to Primes – Algorithm Implementations
I was tackling a Fibonacci problem on LeetCode recently. My recursive solution timed out immediately. Looking for an online tool to verify my optim…
JavaScript Number Base Converter: From parseInt to Bitwise Operations
Published: April 29, 2026, 11:00
NPM Dependency Analysis: From package.json to Dependency Tree Visualization
I inherited a legacy project recently with 800MB of node_modules and 200+ dependencies in package.json. Every npm install took forever, and C…