DevToolbox Blog

JSON · Beginner

How to Format JSON: A Complete Guide (2026)

JSON formatting, compression, and validation. 3 common errors, 4 FAQs, and a free online tool. Covers API debugging, config files, and log analysis.

Base64 · Deep Dive

What is Base64 Encoding? A Developer's Guide

Base64 is not encryption! 3-bytes-to-4-chars principle, full 64-char index table, Base64 vs Base64URL differences, 4 common myths debunked.

URL · Encoding

URL Encoding: The Complete Developer's Guide

Percent-encoding rules, encodeURI vs encodeURIComponent differences, Python/JS examples, 4 FAQs, and a free online URL encoder/decoder.

Regex · Advanced

Regex for Beginners: From Zero to Pro

Character classes, quantifiers, groups, lookarounds explained. 4 real-world patterns (email, URL, phone, HTML), JS match/replace/test, 5 common pitfalls.

UUID · Selection

What is a UUID? The Developer's Guide (2026)

UUID v1/v3/v4/v5/v7 versions compared, 10⁻¹² collision math, UUID vs auto-increment trade-offs, 4 use cases, free UUID generator.