How to use the Regex Generator
- Set your preferences. Choose Pattern for and Test String.
- Click “Generate regex”. Fresh results are generated instantly using a secure random source.
- Copy your favourites. Copy individual results or everything at once, or download them.
- Generate again. Click again as many times as you like — it’s unlimited and free.
About this tool
JSON, XML, YAML, SQL, CSS, JS formatters, encoders, regex and code generators.
Read the complete Regex Generator guide
Frequently asked questions
Is the Regex Generator free to use?
Yes. The Regex Generator on Gemma-4 is 100% free with no sign-up, no limits and no watermark. An optional free account lets you save favourites.
Is my data private?
Yes. Your inputs are processed instantly and are not stored on our servers.
Does it work on mobile phones?
Absolutely. The Regex Generator is fully responsive and works on Android, iPhone, tablets and desktop browsers such as Chrome, Edge, Safari and Firefox.
Are the results truly random?
Yes — the generator uses your browser’s cryptographically secure random number generator (crypto.getRandomValues), so every result is unbiased.
Who is the Regex Generator useful for?
It is popular with web developers, backend and API engineers, students learning to code — anyone who needs quick, reliable help with formatting, validating and converting code and data.