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Cross-Browser Testers
Patterns safe for all browsers.
6 Tools Available
Safe Email
Simple, widely supported email regex.
/^[^@]+@[^@]+\.[^@]+$/
Safe Date
Basic date, no lookbehinds.
/^\d{4}-\d{2}-\d{2}$/
Safe Alphanumeric
Basic character class.
/^[a-zA-Z0-9]+$/
Safe URL
Simple start check.
/^https?:///
Safe Username
Simple range check.
/^[a-z0-9_-]{3,16}$/
Safari Lookbehind
Test Lookbehind (supported in newer Safari).
/(?<=prefix)text/