Writing regular expressions from scratch is error-prone and time-consuming. Our Regex Generator provides battle-tested patterns for the most common validation scenarios, complete with code snippets for JavaScript and Python.
About Regex Pattern Generator
Generate common regular expression patterns for emails, URLs, dates, IPs, and more. Search by keyword to find the right pattern instantly. It's built for string manipulation and text-processing tasks, runs instantly, and works on any device — no install, no sign-up.
How to use Regex Pattern Generator
Paste or type your input into the editor on the left.
Leave the defaults, or tweak them if the tool exposes options.
The result appears instantly on the right — everything runs in your browser, so nothing is uploaded.
Copy the output, or download it, and you're done.
Why use Regex Pattern Generator?
Fast and local — the transform happens in your browser, so there's no round-trip and no waiting.
Private by default — your input never leaves your device.
Accurate — the same, well-tested logic powers both this page and the public API.
Free — unlimited use in the browser, with an optional API for automation.
Use it from the API
Everything this page does is also available as a REST endpoint, so you can call Regex Pattern Generator from your own code, a script or a CI pipeline.
The endpoint returns a JSON envelope ({ ok, data, meta }) and costs 1 credit per successful call. Try it in the playground or browse the full API reference.
Frequently asked questions
Is Regex Pattern Generator free to use?
Yes — use it in the browser as much as you like. The optional API has a free tier and pay-as-you-go pricing for heavy or automated use.
Is my data private?
Yes. Regex Pattern Generator runs entirely in your browser — your input never leaves your device and nothing is logged or stored.
Can I automate Regex Pattern Generator?
Yes — call the regex-generator API endpoint from any language and script it into your workflow.