Build patterns, test against sample text, and export your work. Everything runs in your browser.
Pattern
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Flags
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Test text
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Legal Disclosure
This page runs entirely in your browser and does not send your patterns or text to any server. Patterns and example data that you choose to download are created locally and saved to your device. Use is your responsibility and must comply with applicable laws and acceptable-use rules. Regular expressions can have performance implications on large inputs. Test carefully before using patterns in production.