Blog
Guides and tutorials for developers
Diff Checker Online: How to Compare Text and Find Differences Fast
Compare two texts side by side and spot every difference instantly. Learn how diff algorithms work, when to use them, and try our free diff checker tool.
How to Use Regex in JavaScript (With Real Examples)
Learn JavaScript regex with practical examples: match, test, replace, and named groups. Copy-paste patterns for emails, URLs, dates, and more.
API Authentication: JWT vs API Keys vs OAuth Explained
JWT, API keys, and OAuth solve different authentication problems. Learn which method fits your use case, with real examples and trade-offs.
How to Validate and Debug JSON in VS Code
Fix broken JSON fast. Learn VS Code's built-in JSON validation, schema support, and the best extensions for debugging API responses and config files.
Word Count and SEO: Why Length Still Matters in 2026
Does word count affect SEO rankings? Data says yes — indirectly. Learn the real relationship between content length and Google rankings.
Color Formats: HEX, RGB, and HSL Explained
Learn how HEX, RGB, and HSL color formats work, when to use each one, and how to convert between them with practical CSS examples.
What Is AI Inference? A Developer's Guide
AI inference is the process of running a trained model to get predictions. Learn what affects latency, cost, and how to optimize API calls.
Lorem Ipsum Alternatives for Modern Design
The best lorem ipsum alternatives for design mockups — from industry-specific generators to real-content approaches.
Unix Timestamps: What They Are and How to Use Them
A Unix timestamp counts seconds since Jan 1, 1970 UTC. Learn to convert, compare, and work with timestamps in JavaScript and Python.
JWT Tokens Explained: Structure and Use Cases
JWT is a compact token format for authentication and API auth. Learn how JWTs are structured, signed, and decoded with real examples.
Regex for Beginners: Essential Patterns Explained
Learn the core regex patterns that show up in real code — from validating emails to extracting data — with examples you can run right now.
URL Encoding Explained: When and Why to Encode URLs
Percent-encoding turns unsafe characters into %XX sequences. When to encode, when not to, and the encodeURIComponent vs encodeURI trap.
SHA-256 vs MD5 vs SHA-1: Which Hash Should You Use?
MD5 and SHA-1 are the wrong defaults in 2026. Here’s how to choose the right hash for checksums, passwords, and signatures.
How to Generate Secure Passwords in 2026
NIST rewrote the rules on passwords. Here's what actually makes a password secure in 2026, and how to generate ones you can trust.
Base64 Encoding: What It Is and How It Works
A clear, practical guide to Base64 encoding — how it works under the hood, common use cases, and when you should (and shouldn't) use it.
UUID Guide: What They Are and When to Use Them
Everything you need to know about UUIDs — what they are, the different versions, when to use them, and common pitfalls to avoid.
What Is JSON? Formatting and Validation Guide
Learn what JSON is, how it works, and why formatting and validation matter. A practical guide with examples for all levels.