Why isn't my regex matching?

Check escaping, anchors (^ $), and flags.

What does the g flag do?

Finds all matches instead of stopping at the first.

Use the multiline (m) flag and/or dotAll depending on engine.

Test and debug regular expressions with real-time matching and groups.

regexregular expressionpatternmatchtest

Regular Expression

//g

Test String

Patterns for matching text.

Validation, parsing, search/replace.

Remember to escape special chars and choose proper flags (g,i,m).

Quick answers about usage, privacy, and best practices.

Privacy: Everything runs locally in your browser. No data is sent to a server.

Format, validate, and beautify JSON with error detection.

Convert text between lowercase, UPPERCASE, Title Case, camelCase, snake_case and more.

Remove extra whitespace, trim lines, normalize line endings, and clean messy text.

Privacy First: This tool runs entirely in your browser. No data is sent to any server.