Regex

Test, explain and build regular expressions.

• Regex Tester

  Test a regular expression against sample text and see every match with its position and capture groups in a table. Uses the native JavaScript engine.

• Regex Cheat Sheet

  A filterable reference table of 30 core regex tokens — character classes, quantifiers, groups, lookaheads and anchors — each with a worked example.

• Regex Generator for Common Patterns

  Pick email, URL, IPv4, IPv6, date, phone, UUID or hex color and get a vetted regex pattern with an explanation and verified sample matches.