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Developer Guides & Tool Tutorials

Practical guides on formatting JSON, decoding JWTs, choosing hash algorithms, generating UUIDs, and other everyday developer tasks — all runnable free, right in your browser.

Web & Regex Tools

Mastering Regex: A Practical Guide to Building and Testing Patterns

Regular expressions are unreadable until you test them incrementally. Here is a workflow for building a pattern piece by piece instead of guessing.

Alex Developer

July 22, 2026 • 2 min read

Web & Regex Tools

Text Diff Checking 101: Comparing Code and Content Like a Pro

Line-by-line diffing isn't just for git. Here is how to use a diff checker to review config changes, compare API responses, and catch silent edits.

Alex Developer

July 22, 2026 • 2 min read