What is the regex for relative url?

The regex pattern for relative url is `^\/[^\s]*$`. This pattern validates relative url path starting with /.

How do I use this regex in JavaScript?

In JavaScript, create the regex with `const regex = /^\\/[^\s]*$/;` and test with `regex.test(yourValue)`. It returns `true` if the value matches.

How do I use this regex in Python?

In Python, use `import re; re.match(r'^\/[^\s]*$', value)`. The raw string prefix (`r`) prevents Python from interpreting backslashes as escape characters.

Is this regex case-sensitive?

By default, yes. To make it case-insensitive, add the `i` flag in JavaScript (`/^\/[^\s]*$/i`) or use `re.IGNORECASE` in Python.

Regex for Relative URL

Regex Pattern

^\/[^\s]*$

Relative URL path starting with /

Quick Answer

The regex pattern for relative url is `^\/[^\s]*$`. Relative URL path starting with /. This works in JavaScript, Python, Ruby, PHP, Java, and most regex engines that support PCRE syntax.

Test Examples

Input	Result
/about	✓ Matches
/api/v1/users	✓ Matches
/path?query=value	✓ Matches
https://example.com	✗ No match
relative/path	✗ No match
no-slash	✗ No match

Code Examples

javascript

const regex = /^\\/[^\s]*$/;
const isValid = regex.test(value);

python

import re
pattern = r'^\/[^\s]*$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^\/[^\s]*$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^\\/[^\s]*$/', $value)) {
    echo "valid";
}

java

String pattern = "^\\/[^\\s]*$";
boolean isValid = value.matches(pattern);

Frequently Asked Questions

Related Regex Patterns

Subdomain Extraction

Extracts the subdomain from a URL or domain name

Protocol Detection

Detects and captures the protocol from a URL

Port Number

Extracts port number from a URL or host string

Query Parameter

Extracts key-value pairs from URL query strings

HTTP vs HTTPS URL

Matches HTTP or HTTPS URLs and captures the protocol

Data URL

Matches data: URL scheme with optional MIME type and base64 encoding