Username Validator
Check if usernames meet requirements. Configurable rules for characters and length.
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How to Use Username Validator
- Enter a username to validate
- Configure rules (length, allowed characters, etc.)
- See validation results with specific feedback
- Test against common platform rules
About Username Validator
Validate usernames against configurable rules. Check length, allowed characters, reserved words, and common patterns. Perfect for testing form validation or checking username availability requirements.
Frequently Asked Questions
What rules can I configure?
Minimum/maximum length, allowed characters (letters, numbers, dots, underscores, hyphens), starting character rules, and reserved words.
Does this check if the username is taken?
No, this only validates format. Availability must be checked against the specific platform's database.
What are reserved words?
Words like "admin", "root", "system" that many platforms don't allow as usernames.