CNPJ Validator

Validate CNPJ values with official check-digit algorithms for testing workflows.

Free · no login · browser-based

CNPJ validator

CNPJ values (one per line, up to 10,000)

Checked

Passed

Failed

Validation checks syntax and checksum rules only. It does not query issuers, governments or identity databases.

Validation results for each supplied value
Value	Status	Context	Details
`04.252.011/0001-10`	Valid	—	Check digits passed

Mathematical validity does not prove registration, issuance or company status. No government registry is queried.