Developer Guides
What Is Well-Formed XML? The 7 Rules (And How to Check)
The seven rules that make XML well-formed — proper nesting, quoting, escaping, single root — with examples of each violation and how to find errors fast.
2026-06-30CSS Minification: How Much It Saves and How to Do It Right
What CSS minification removes, realistic before/after numbers, the render-blocking reason CSS bytes matter more, and how to minify safely.
2026-06-26JSON Syntax Rules Explained (With Valid and Invalid Examples)
The complete JSON syntax rulebook: data types, strings, numbers, escaping, nesting — each rule shown with a valid and an invalid example side by side.
2026-06-23SQL Formatting Best Practices for Readable Queries
The formatting conventions professional teams use for SQL: keyword casing, clause alignment, join style, CTE layout, and why consistent formatting catches bugs.
2026-06-19How to Format JSON in VS Code (Shortcuts, Settings & Fixes)
Every way to format JSON in Visual Studio Code: keyboard shortcuts, format on save, sorting keys, fixing 'no formatter installed', and handling JSONC files.
2026-06-16How to Pretty Print JSON in Python (3 Methods)
Pretty print JSON in Python with json.dumps, the command-line json.tool module, and pprint — including sorting keys, handling files, and Unicode gotchas.
2026-06-12What Is Code Minification and How Much Does It Actually Save?
Minification explained: what gets removed from HTML, CSS, JSON and JavaScript, realistic size savings, how it interacts with gzip, and when not to bother.
2026-06-09How to Validate JSON in JavaScript (With Code Examples)
Three levels of JSON validation in JavaScript: syntax checking with JSON.parse, structural checks, and full schema validation — with copy-paste code for each.
2026-06-05JSON vs XML: Differences, Strengths, and When to Use Each
A clear comparison of JSON and XML: syntax, size, parsing speed, schemas, and the situations where each format is genuinely the better choice.
2026-06-02How to Fix "Unexpected Token" Errors in JSON
A practical guide to the most common JSON syntax error. What "Unexpected token" means, the six mistakes that cause it, and how to find the broken line fast.