Regular Expression for URL validation

Question

I have written regex to validate URL which could be either like

google.com

www.google.com

http://www.google.com

https://www.google.com

I have used

Regex urlRx = new Regex(@"^(http|ftp|https|www)://([\w+?\.\w+])+([a-zA-Z0-9\~\!\@\#\$\%\^\&\*\(\)_\-\=\+\\\/\?\.\:\;\'\,]*)?$", RegexOptions.IgnoreCase);

It works for http & https.It is not working for google./com & www.google.com.

Please help me to solve this.

Thanks

Here's a nice page with the comparison of different regexes for parsing urls: mathiasbynens.be/demo/url-regex The best one is: _^(?:(?:https?|ftp)://)(?:\S+(?::\S*)?@)?(?:(?!10(?:\.\d{1,3}){3})(?!127(?:\.\d{1,3}){3})(?!169\.254(?:\.\d{1,3}){2})(?!192\.168(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\x{00a1}-\x{ffff}0-9]+-?)*[a-z\x{00a1}-\x{ffff}0-9]+)(?:\.(?:[a-z\x{00a1}-\x{ffff}0-9]+-?)*[a-z\x{00a1}-\x{ffff}0-9]+)*(?:\.(?:[a-z\x{00a1}-\x{ffff}]{ — Jakub Konecki
– Jakub Konecki, Commented Feb 15, 2012 at 6:45
I used this one (without ftp) |^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$|i — AjayR
– AjayR, Commented Feb 15, 2012 at 6:48
Be warned, for simple cases, this is simple, for complicated cases (e.g. with a query string or special characters in the url), it's not simple... — Benjol
– Benjol, Commented Feb 15, 2012 at 8:08

Ian Kemp - SO dead by AI greed · Accepted Answer · 2025-06-11 11:14:38Z

63

no need for a regex IMHO - try

Uri.IsWellFormedUriString(YourURLString, UriKind.RelativeOrAbsolute)

See MSDN

edited Jun 11 at 11:14

Ian Kemp - SO dead by AI greed

1

answered Feb 15, 2012 at 6:46

Yahia

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9 Comments

Yahia Over a year ago

@PrateekSaluja I am not sure that I understand - YourURLString is just normal string... or do have a normal text with some links somewhere in the middle of it ?

PrateekSaluja Over a year ago

Please test this message. "Hello how are you? www.google.com"

Joseph Woodward Over a year ago

Be careful using this as the only way to validate a URL, as it allows for URIs such as javascript:alert('Invitation to hack me');

Matthew Over a year ago

@Yahia - Your answer allows for non-web URLs (eg file paths) and I think the OP is looking to ensure the URLs are valid http/http URLs.

Eric Burdo Over a year ago

This doesn't work if you need client side validation. Granted, this isn't what the OP asked... just making a comment.

|

Sina Iravanian · Accepted Answer · 2012-02-15 07:18:37Z

6

Put the protocol section in an optional group i.e., ()?:

^((http|ftp|https|www)://)?([\w+?\.\w+])+([a-zA-Z0-9\~\!\@\#\$\%\^\&\*\(\)_\-\=\+\\\/\?\.\:\;\'\,]*)?$

answered Feb 15, 2012 at 7:18

Sina Iravanian

16.3k4 gold badges37 silver badges46 bronze badges

1 Comment

brandeded Over a year ago

System.Text.RegularExpressions.Regex regex = new System.Text.RegularExpressions.Regex(@"^((http|ftp|https|www)://)?([\w+?\.\w+])+([a-zA-Z0-9\~\!\@\#\$\%\^\&\*\(\)_\-\=\+\\\/\?\.\:\;\'\,]*)?$");

danmbuen · Accepted Answer · 2014-05-09 09:05:12Z

I got this code from jquery.validation (i made some edits)

bool isValid = (Regex.IsMatch(value, @"(((([a-z]|\d|-|.||~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'()*+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]).(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]).(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]).(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|.||~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))).)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))).?)(:\d*)?)(/((([a-z]|\d|-|.||~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'()*+,;=]|:|@)+(/(([a-z]|\d|-|.||~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'()*+,;=]|:|@)))?)?(\?((([a-z]|\d|-|.||~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'()*+,;=]|:|@)|[\uE000-\uF8FF]|/|\?)*)?(#((([a-z]|\d|-|.||~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'()*+,;=]|:|@)|/|\?)*)?$"));

I was searching for almost a whole day and this is the best I found.. These are just the few valid samples:

example.com
example.com.ph
www.example.com
http://example.com
https://example.com
http://www.example.com
ftp://example.com
example.com/doc
www.example.com/doc
http://example.com/doc
http://example.com/questions/12576252/convert-javascript-regex-to-c-sharp-regex-for-email-validation
http://www.example.com/wpstyle/?p=364
http://userid:[email protected]:8080
https://www.example.com/foo/?bar=baz&inga=42&quux
LDAP://ad1.cc.uq.edu.ph

I tried this one but it returned a false positive for a phone number like this: (937) 555-1212

user30776267 · Accepted Answer · 2025-06-13 14:28:27Z

0

^(http|http(s)?:\/\/)?([\w-]+\.)+[\w-]+[.com|.in|.org]+

edited Jun 13 at 14:28

user30776267

32 bronze badges

answered Apr 18, 2017 at 5:22

Mayank Prajapati

374 bronze badges

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