Regex Generator

Use presets for common validations or build a custom regex from text.

Custom Text

Build a pattern from your own text.

Edit the text to generate a pattern.

Match Mode

Options

Flags

Generated Regex

/Invoice INV-2026-042/gi
/api/regex?preset=custom&flags=gi&text=Invoice+INV-2026-042&mode=contains&escape=1
Presets are practical defaults and may not cover every edge case. Always validate inputs on the server.