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The Internet Compass

Developer Utilities

Regex Pattern Library

The patterns you look up every few months — email, URL, IPv4, hex colour, dates — ready to copy and test against your own examples.

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How it works

  1. 1Pick a common pattern from the library
  2. 2Test it immediately against sample or your own text
  3. 3Copy the pattern once it matches what you need

Who this is for

  • Grabbing a battle-tested email validation pattern
  • Starting from a known-good pattern instead of writing from scratch
  • Verifying a pattern against real edge cases before shipping

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