Regex Foundry — 50+ Ready-to-Use Regex Patterns
Browse 50+ production-ready regex patterns across 9 categories. Copy, test, and filter by name or category.
About this tool
A curated library of production-ready regular expressions organised by category — web, network, dates, numbers, identity, phone, text, code, and finance. Search by keyword, filter by category, copy any pattern to clipboard, or open it in the Regex Tester to validate it against your own input.
Why a Pattern Library?
Writing regex from scratch is error-prone and time-consuming. The Regex Foundry gives you a starting point — well-tested patterns for the most common validation tasks like emails, URLs, phone numbers, and IDs. Tweak them for your exact requirements rather than starting from a blank slate.
library_books50+ Patterns, Zero Guesswork
Find the pattern you need in seconds — search by name or browse by category. Each pattern includes a description, example matches, and the exact regex flags to use.
Click 'Test' on any pattern to open it in the Regex Tester with a pre-loaded sample string.
Quick Usage Guide
- 150+ verified regex patterns across 9 categories
- 2Search by pattern name, description, or example
- 3Filter by category: Web, Network, Dates, Numbers, Identity, Phone, Text, Code, Finance
- 4Copy pattern to clipboard with one click
- 5Open any pattern directly in the Regex Tester
- 6100% client-side — no data sent anywhere
Frequently Asked Questions
help_outlineAre these patterns production-ready?
Yes. Every pattern has been tested against common valid and invalid inputs. That said, always test against your specific data set before using in production — edge cases vary by domain.
verifiedHow do I use a pattern from the Foundry?
Click 'Copy' to copy the raw pattern string, or click 'Test' to open it in the Regex Tester with sample input pre-loaded.
quizWhat regex flavour do these patterns use?
All patterns use the JavaScript (ECMAScript) regex engine — compatible with browsers, Node.js, and most modern environments.
account_balance_walletCan I contribute patterns?
Use the Request a Tool page to suggest new patterns or categories. We review and add new entries regularly.