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Technical references and how-to guides for developers — JSON, Base64, regex, encoding, hashing, and more.
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JSON Complete Guide: Syntax, Validation, and Best Practices
Everything you need to know about JSON — syntax, data types, validation, formatting best practices, and the most common errors developers encounter.
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Regular Expressions (Regex): A Beginner's Complete Guide
Regular expressions let you search, validate, and transform text with precise pattern matching. This beginner guide covers every core concept with real examples.
What Is JSON? A Clear Explanation With Examples
JSON (JavaScript Object Notation) is a lightweight text format for storing and exchanging data. It's used in virtually every web API, app configuration file, and data exchange system. Here's what you need to know.
Base64 Encoding Explained: What It Is and When to Use It
Base64 converts binary data to ASCII text, enabling it to be transmitted in text-only environments like email, JSON, and HTML. Here's how it works and when to use it.
Strong Password Guide: How to Create Secure Passwords
Password security advice has changed significantly. Here's what actually makes a password strong in 2025 — based on current NIST guidelines and real-world attack data.
JSON vs XML: A Developer's Complete Comparison Guide
JSON is lighter, faster to parse, and easier to read. XML is more expressive, supports namespaces, and has stronger schema validation. The right choice depends on your use case.
What Is a UUID? Format, Versions, and Use Cases Explained
A UUID (Universally Unique Identifier) is a 128-bit number formatted as a 36-character string. Correctly generated, a UUID has a collision probability so low it's treated as globally unique.
JSON Formatter Guide: Beautify, Validate, and Minify JSON
A JSON formatter transforms minified JSON into readable, indented output — and validates it for syntax errors. This guide covers formatting, validating, and minifying JSON with practical examples.
Common JSON Errors and How to Fix Them
JSON syntax errors are among the most frustrating bugs to debug — a single misplaced comma or wrong quote breaks everything. Here are the 10 most common JSON errors with their exact fixes.
Regex Cheat Sheet: Complete Regular Expression Reference
A complete regex quick reference: character classes, quantifiers, anchors, groups, lookaheads, flags, and 15 common ready-to-use patterns for emails, URLs, dates, and more.
UUID vs GUID: What's the Difference?
UUID and GUID refer to the same 128-bit identifier format. GUID is Microsoft's term; UUID is the RFC 4122 standard name. There are minor implementation differences, but in practice they're interchangeable.