Guides
Practical guides for developers
Deep-dives on common developer tasks — formatted JSON, decoded JWT tokens, optimized images, and more. Every guide links to a free browser tool so you can apply what you learn instantly.
How to Debug a JWT Token Locally
Decode JWT payloads, inspect claims, check expiration, and verify signatures — without sending your token to any third-party server.
JSON vs YAML: Key Differences and When to Use Each
A practical comparison of JSON and YAML syntax, use cases, performance, and common pitfalls — with a guide on converting between them.
How to Compress Images for the Web Without Losing Quality
Learn which formats to use, what compression levels to target, and how to optimize images to pass Core Web Vitals — without uploading them anywhere.
Base64 Encoding Explained: What It Is and When to Use It
Understand what Base64 is, how the encoding algorithm works, real-world use cases in JWTs and data URIs, and what it doesn't protect you from.
How to Format and Validate JSON — A Complete Guide
Everything developers need to know about JSON formatting, the 10 most common JSON syntax errors, and how to validate JSON data correctly.