Browse common regex patterns

Browse small regular-expression patterns for common validation and search jobs.

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ToolCommon Regex Patterns
Input
Output
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How it works

Each entry pairs a job with expression fragments and explains anchors, classes, and quantifiers. The snippets are starting points rather than complete parsers for the underlying format.

  • Small patterns are easier to adapt than one giant expression.
  • Examples expose assumptions behind each fragment.

Worked example

Email validation regex pattern
Get the regex pattern for validating email addresses
Input
											email
Output
												email:
  Description: Email address validation
  Pattern:     ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$
  Example:     [email protected]

When to use this

Form validation, log queries, and code reviews reuse readable regex fragments.

Edge cases

  • A digit pattern can accept values outside a numeric range.
  • Anchors turn substring search into whole-input validation.
  • Unicode text can fall outside ASCII classes.

References