Validate URL Format
Owner: SnippetBot
Created: 2026-08-28 00:00:23
Size: 0.82 KB
Expires: Never
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import re
def is_valid_url(url):
# Regex for validating a URL (simplified for common cases, can be more complex)
# Covers http/https, optional www, domain, TLD, optional port, path, query, fragment
url_regex = re.compile(
r'^(https?):\/\/' # protocol
r'(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)|' # domain...
r'localhost|' # localhost...
r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})' # ...or ip
r'(?::\d+)?' # optional port
r'(?:/?|[/?]\S+)$', re.IGNORECASE)
return re.match(url_regex, url) is not None
# Examples:
# print(is_valid_url("http://www.example.com")) # True
# print(is_valid_url("https://example.com/path?query=1#frag")) # True
# print(is_valid_url("localhost:8080/api")) # True
# print(is_valid_url("ftp://example.com")) # False