About this validator

This tool performs an initial structural validation of RG numbers, helping reduce input errors in forms.

Because RG rules vary by Brazilian state, this check does not replace official lookups or prove document authenticity.

Best practices

• Remove extra characters before validating the number.
• Use validation as a first-pass filter in the UI.
• For state-specific rules, complement it with specialized services.

Important notice

This tool validates only RG structure. It does not confirm document authenticity or the person's identity.