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Regex Tester

Regex Tester & Generator

  • Test patterns against sample text in real time.
  • Use flags like global, multiline, and case-insensitive.
  • Great for validating emails, URLs, and IDs.
Paste or type your input below, then use the buttons to process it.
Example: Test emails with: 
Pattern:  ^[^@\s]+@[^@\s]+\.[^@\s]+$
Text:     user@example.com

Test regular expressions with live match highlighting, validate patterns, generate common regexes and save snippets for later. Runs entirely in your browser using JavaScript’s RegExp.

Regex Tester

g = global i = ignore case m = multiline s = dotAll

Test Text

Matches are highlighted on the right. We use JavaScript’s RegExp, so syntax follows JS regex rules.

No test run yet.
Test text with highlighted matches will appear here.

Regex Presets & Quick Generator

Selecting a preset fills the pattern, flags and a sample test text.

We use simple keyword rules to suggest a regex. Review and adjust before using in production.

Pattern explanation (simple)

After you enter a pattern, a simple breakdown of anchors, character classes and quantifiers appears here.

Test Cases

Each line below is treated as a separate test case against the current regex pattern and flags.

Results will appear here as ✔ (match) or ✖ (no match).

Saved Regex Snippets

Saves pattern + flags + timestamp in your browser (localStorage). Not synced to any server.

Your saved snippets