Browser utility · No upload
Regex Generator
Generate, test, and validate regular expressions — free, private, and instant.
Runs locally in your browser — your input is never uploaded or stored.
About this tool
Regex Generator lets you generate, test, and validate regular expressions without installing an app or creating an account. See matches immediately and catch invalid patterns before using them in code.
Paste sample text and refine your pattern with live highlighting until it matches exactly what you intend — useful for form validation, log parsing, search-and-replace, and data extraction.
How it works
- Enter or choose your values
- Review the instant result
- Copy or download the result
Frequently asked questions
How do I use Regex Generator?
Enter or choose your input in the tool above. The result updates immediately or appears when you select the action, ready to copy or download.
Which regex flavor does it use?
It uses the JavaScript (ECMAScript) regular-expression engine built into your browser, including flags like global, case-insensitive, and multiline.
Is Regex Generator free, and is my data private?
Yes. Regex Generator is free with no account or watermark, and it runs entirely in your browser so your input is never uploaded, stored, or shared.
Does it work on phones and tablets?
Yes. It works in current browsers on Android, iPhone, iPad, Windows, macOS, and Linux.