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> Test patterns against real text and inspect all matches.
> Toggle flags, debug errors, and copy the final expression.
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Explore the most common scenarios for Regex Tester below. Each page is a focused calculator with worked examples and edge-case guidance.
Test and debug regular expression patterns for email validation. Verify your pattern matches valid emails and rejects invalid formats.
Test Email RegexTest regular expressions for validating phone numbers in multiple formats: E.164 international, US domestic, dashes, spaces, or parentheses.
Test Phone RegexTest regular expressions for URL validation. Match HTTP, HTTPS, and custom protocol URLs with query strings and fragment identifiers.
Test URL RegexTest regex patterns for date validation. Match ISO 8601, DD/MM/YYYY, MM-DD-YYYY, and custom date formats.
Test Date RegexRegex Builder AI
Generate regex patterns for validation, extraction, and replacement scenarios.
Cron Validator
Validate cron expressions, see next run times, and field breakdown.
JSON Formatter
Validation, formatting and syntax highlighting for JSON.
Base64
Encode and decode text to/from Base64 format with UTF-8 support.