Regex Editor & Tester

Matches exactly 6 characters where each position excludes specific character ranges. The `.{0}` tokens are no-ops, so it effectively validates a 6-character code. Each position excludes different letter ranges (like A-C, D-G, etc.) and consistently blocks ambiguous characters O, 0, Q, and I to prevent visual confusion. Used for generating human-readable codes, license keys, or verification tokens where clarity is critical.