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Regex Pattern Generator

Developer

Search a predefined JavaScript regular-expression library and try the selected pattern against text.

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Describe what you need
Generated pattern
/^[\w.+-]+@[\w-]+\.[A-Za-z]{2,}$/

Matches a standard email address: local part, @, domain name, and a 2+ letter TLD.

Example match: ada@example.com

Test string0 matches
Highlighted matches
Search a predefined JavaScript regular-expression library and try the selected pattern against text. This searches templates, not arbitrary natural-language generation.
See more about the Regex Pattern Generator
Format matches don't prove that an address, date or account exists.
Examples
Worked example
Choose the IPv4 preset: 192.168.1.1 matches and 999.1.1.1 doesn't.
This searches templates, not arbitrary natural-language generation. Format matches don't prove that an address, date or account exists.
Key features
  • Search a predefined JavaScript regular-expression library and try the selected pattern against text.
Related Blog Posts
Quick answers for Regex Pattern Generator
What does the Regex Pattern Generator do?
Search a predefined JavaScript regular-expression library and try the selected pattern against text. The Regex Pattern Generator is one of 900+ free developer tools on Toolblip  -  all open to use without a signup.
How do I use the Regex Pattern Generator?
Open the Regex Pattern Generator on this page, paste or upload your input, and the result updates as you type. Use the copy button to grab the output, or adjust options to tune the result. Nothing you enter leaves your browser.
Is the Regex Pattern Generator free to use?
Yes. The Regex Pattern Generator is a free online tool on Toolblip  -  no signup, no account, no hidden usage limits. It runs in your browser and works on desktop and mobile.
Is the Regex Pattern Generator safe and private?
Yes. The Regex Pattern Generator processes your data entirely client-side, so nothing you paste is uploaded or stored on any server. It's safe to use with internal snippets, private keys for debugging, or any other sensitive content you'd rather not send to a remote service.
What kind of output does the Regex Pattern Generator produce?
The Regex Pattern Generator produces clean, formatted output that you can copy or download with a single click. The output is tailored to the tool's purpose (formatted code, converted data, transformed text, or processed media) and is ready for immediate use in your project or workflow.
Does the Regex Pattern Generator work on mobile devices?
Yes. The Regex Pattern Generator is designed to work on any device with a modern browser, including phones and tablets. The interface adapts to smaller screens, and the core functionality (paste input, transform, copy output) works the same way regardless of your device.
Do I need to install anything to use the Regex Pattern Generator?
No. The Regex Pattern Generator runs entirely in your browser  -  no downloads, no accounts, no API keys. Paste your input, get the output, copy it back into your editor.
Can the Regex Pattern Generator handle large input files or long text?
Yes. The Regex Pattern Generator processes everything locally in your browser, so the only limit is your device's available memory. There are no arbitrary caps on input size, character count, or processing time that you would typically encounter with server-based tools.
Can I use the Regex Pattern Generator offline?
Once the page has loaded, the Regex Pattern Generator continues to work without an internet connection. Bookmark this page and return to it anytime  -  all logic runs locally.