Test Regex for Form Validation
Write and test regular expressions for validating emails, phone numbers, postcodes, and other form inputs.
Test text
Matches
Form Validation tips
Test your validation pattern against both valid and invalid inputs before adding it to your code. Edge cases are easy to miss.
Email validation regex is surprisingly complex. A practical pattern: ^[^\s@]+@[^\s@]+\.[^\s@]+$ — simpler patterns catch most real addresses.
Phone number formats vary by country. Consider whether to validate format or just digits — stricter validation can frustrate international users.
Use named capture groups (?<year>\d{4}) to extract parts of matched strings in your validation code.
Cách hoạt động
Tại sao chọn của chúng tôi?
Also check out…
Parse Server Logs with Regex
Write regex patterns to extract timestamps, IP add
Extract and Replace Text with Regex
Use regex to find patterns, extract data, or prepa
Test URL Routing Patterns
Write and test regex patterns for URL routing rule
Extract Data with Regex
Build and test patterns to extract structured data