Test Regex for Form Validation

Write and test regular expressions for validating emails, phone numbers, postcodes, and other form inputs.

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Regular expression

//g

Flags:

Examples:

Test text

Matches

The quick brown fox jumps over the lazy dog. Pack my box with five dozen liquor jugs.Enter a pattern above to see matches highlighted here.

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.

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Enter your data into the tool above. Everything stays local to your browser.

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The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

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Get your result instantly. Nothing is stored after you leave the page — complete privacy.

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✓کوئی اکاؤنٹ، ای میل یا لاگ ان درکار نہیں

✓فائلیں کبھی آپ کے ڈیوائس سے نہیں نکلتیں

✓فائل سائز کی کوئی حد نہیں

✓کسی بھی آؤٹ پٹ پر کوئی واٹر مارک نہیں

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