Regex guides

Regular expression patterns, groups, flags and common pitfalls.

1 guide

Regex Basics: Patterns You Will Actually Use

Learn regular expressions from the parts that matter: character classes, quantifiers, anchors, groups, greedy vs lazy matching, flags and the pitfalls that cause bugs.

beginner 8 min20 May 2026

All Regex guides

1 published

Regex

Regex Basics: Patterns You Will Actually Use

Learn regular expressions from the parts that matter: character classes, quantifiers, anchors, groups, greedy vs lazy matching, flags and the pitfalls that cause bugs.

beginner 8 min20 May 2026

Tools for this topic

Regex TesterTest and debug regular expressions in real time Text DiffCompare text and highlight every line and word change URL EncoderEncode and decode URL strings safely for the web JSON FormatterFormat, validate, beautify and minify JSON instantly SQL FormatterBeautify SQL queries with clean, readable formatting Cron ExpressionBuild, validate and explain cron schedules visually

Regex Basics: Patterns You Will Actually Use

All Regex guides

Regex Basics: Patterns You Will Actually Use

Tools for this topic

Other topics