TLD Validation (2–6 Character) Regex for Python

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching tld validation (2–6 character), ported and verified for Python. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Python project — whether you're validating in a Django view, a FastAPI endpoint, or a standalone data processing script.

Python Implementation

# TLD Validation (2–6 Character)
# ReDoS-safe | RegexVault — Web & Network > Domain

import re

tld_validation_26_character_pattern = re.compile(r'^[a-zA-Z]{2,6}$')

def validate_tld_validation_26_character(value: str) -> bool:
    return bool(tld_validation_26_character_pattern.fullmatch(value))

# Example
print(validate_tld_validation_26_character("com"))  # True

Test Cases

When to use this pattern

This pattern is drawn from the Web & Network > Domain category and carries a ReDoS-safe certification. That matters for Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

New gTLDs (e.g., .photography, .construction) can be up to 24 characters. Adjust the upper bound to {2,24} if validating modern TLDs. The IANA TLD list is the authoritative source.