URL Validation Regex

Validation

Regular expression

/https?:\/\/[A-Za-z0-9.-]+\.[A-Za-z]{2,}(?:\/[^\s]*)?/

Pattern breakdown

Part	Meaning
`Anchor or context`	Use anchors when you need whole-string validation.
`Main token`	The core token sequence describes the accepted text shape.
`Character class`	Character classes limit which characters are valid.
`Quantifier`	Quantifiers control how many characters or groups are accepted.
`Flags`	Use language-specific flags such as i, m, or u only when needed.

Should match

https://toolumina.com/docs
https://example.com/docs

Should not match

example.com
not matching sample
https://toolumina.com/docs invalid
example.comhttps://toolumina.com/docs

Test cases

Input	Expected	Why it matters
`https://toolumina.com/docs`	Match	Representative valid input for this pattern.
`https://example.com/docs`	Match	Representative valid input for this pattern.
`example.com`	No match	Common invalid or boundary input.
`(empty string)`	No match	Common invalid or boundary input.
`not matching sample`	No match	Common invalid or boundary input.
`https://toolumina.com/docs invalid`	No match	Common invalid or boundary input.
`example.comhttps://toolumina.com/docs`	No match	Common invalid or boundary input.

JavaScript

const re = /https?:\/\/[A-Za-z0-9.-]+\.[A-Za-z]{2,}(?:\/[^\s]*)?/;
re.test(input);

Python

import re
bool(re.search(r"https?:\/\/[A-Za-z0-9.-]+\.[A-Za-z]{2,}(?:\/[^\s]*)?", text))

PHP

$ok = preg_match('/https?:\\/\\/[A-Za-z0-9.-]+\.[A-Za-z]{2,}(?:\\/[^\s]*)?/', $value) === 1;

Java

Pattern pattern = Pattern.compile("https?:\\/\\/[A-Za-z0-9.-]+\\.[A-Za-z]{2,}(?:\\/[^\\s]*)?");
pattern.matcher(value).find();

Go

re := regexp.MustCompile(`https?:\/\/[A-Za-z0-9.-]+\.[A-Za-z]{2,}(?:\/[^\s]*)?`)
ok := re.MatchString(value)

Notes and production use

URL Validation regex is useful as a practical starting point. Test it against your real input, avoid using it as the only security control, and prefer a parser when the format has complex grammar.

Performance tip: avoid running complex regular expressions repeatedly on very large untrusted strings without limits. Prefer anchored validation patterns, cap input length before matching, and use a parser when the target format has nested grammar.

URL Validation