Regex Tester

Write a regular expression and test it against multiple lines of text. Matches are highlighted in real-time.

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📋 Common Patterns

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ℹ️ How to Use & FAQ — Regex Tester & Cheatsheet

About MicroKit Regex Tester

MicroKit Regex Tester is a fast, interactive regular expression testing workbench. Test patterns against multiple test strings with instantaneous visual highlight matching, detailed match counts, and flag controls (global, case-insensitive, multiline, and dot-all).

Key Features

  • Instant Live Matching: Matches are computed and highlighted in real-time as you type.
  • Built-in Pattern Cheatsheet: One-click presets for common validation tasks (Email, URL, IPv4, UUID, Hex Colors, Date formats, and Phone numbers).
  • Regex Flags: Easily toggle g (global), i (case-insensitive), m (multiline), and s (dotall).
  • Privacy & Security: No text or regex patterns are sent to an external server. Everything executes client-side.

Frequently Asked Questions

Q: Which regex dialect is supported?
A: The tester uses ECMAScript / JavaScript Regex standards, which are fully compatible with PCRE, Rust, Python (re), and Go regex patterns in standard usage.