Regex Cheat Sheet — free online patterns
You need a regular expression for an email address or a date, but writing one from scratch is fiddly and easy to get wrong. Instead of searching old forum threads, you can grab a pattern that already works. We added a free tool that does it — Regex Cheat Sheet — right in your browser.
What it does
It's a searchable library of ready-to-use regex patterns: email, URL, IP address, UUID, dates and more. You type what you're looking for, find the pattern, and there's a tester so you can paste your own text and check that the pattern matches what you expect.
Nothing leaves your device
The whole thing runs inside your browser. The patterns and any text you test are never uploaded anywhere and nothing is saved on a server. When you close the tab, it's gone.
How to use it
- Open the Regex Cheat Sheet and search for what you need (for example "email" or "date").
- Pick a pattern and paste your own text into the tester to make sure it matches.
- Copy the pattern and drop it into your code.
It's free with no limit. There are more small tools on the Apps page.