UEI Checker & SAM.gov ID Format Validator
The Unique Entity ID (UEI) is a 12-character alphanumeric identifier generated by SAM.gov to uniquely identify contractors doing business with the U.S. federal government.
Validate entity-identifier format, structure, and check digits offline. For LEI codes, also query live status in the official GLEIF registry.
Unique Entity ID (UEI) Format Validator
Checks format & structure only (Crockford's Base32 character set, 12-char length, no leading zero, excluding 'I' and 'O'). This tool does not check active registration; to look up active federal contractor registration status, search the official SAM.gov Registry.
Frequently Asked Questions
What is a valid SAM.gov Unique Entity ID (UEI)?
The Unique Entity ID (UEI) is a 12-character alphanumeric identifier assigned by SAM.gov. It uses Crockford's Base32 character set, starting with a non-zero character and excluding the letters I and O to prevent visual confusion.
How do I verify a Unique Entity ID format?
A valid GSA UEI must be exactly 12 characters long, start with a non-zero character, and consist of Crockford Base32 characters (excluding I and O). This tool performs offline format validation.