Regex Generator
To generate a regular expression, choose a common pattern (email, URL, phone, date, IP address, postcode, hex colour, password rules) or build one from blocks such as 'starts with', 'digits' and 'one of', then test it against your examples.
- Free
- No signup
- Runs in your browser
How to use Regex Generator
- 1Type or paste your input into the Regex Generator.
- 2Choose any options you need.
- 3See the result update instantly.
- 4Copy the result or download it.
Regex Generator: questions people ask
Can a regex fully validate email addresses?
Not completely. The practical pattern here accepts real-world addresses; to be sure an address exists, send a confirmation email.
Which language does the pattern work in?
JavaScript, and in most cases PCRE (PHP), Python and Java too. Flavour notes are shown when they differ.
Is my data uploaded when I use the Regex Generator?
No. The Regex Generator runs entirely in your web browser, so your text and numbers stay on your device and work even on a slow connection.
Does the Regex Generator work on iPhone, Android and Mac?
Yes. The Regex Generator runs in any modern browser (Safari, Chrome, Edge or Firefox) on iPhone, iPad, Android phones, Mac, Windows and Chromebook. There is no app to install.
Is the Regex Generator free?
Yes. The Regex Generator is free with no signup, no watermark and no daily limit.