Aadhaar Validator — Check Aadhaar Number (Free)

Aadhaar number

About the Aadhaar Validator

Aadhaar is a 12-digit identity number issued by UIDAI, usually written in three groups of four such as 2345 6789 0123. A well-formed Aadhaar always starts with a digit between 2 and 9 and carries a built-in check digit, so a single mistyped digit can be caught before it causes trouble on a form or in a spreadsheet.

Because Aadhaar is sensitive, this tool is built privacy-first: the check runs entirely in your browser, the number is never uploaded, and even the result is shown masked with only the last four digits visible. It confirms a number is structurally correct — it cannot confirm the Aadhaar is actually issued, which only UIDAI can do.

How it works

Three steps. No sign-up, no upload, no wait.

Type or paste an Aadhaar

Enter the 12-digit number — spaces are added for readability as you type.

See the result live

The card shows a green tick or red cross instantly, with a plain-English reason.

Read it back safely

A valid number is shown masked (only the last 4 digits) so it stays private.

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Private by design.Everything happens right here in your browser. Your files are never uploaded — we never see them.

Frequently Asked Questions

What is an Aadhaar number? ▼

Aadhaar is a 12-digit identity number issued by UIDAI to residents of India. It is one of the most widely used proofs of identity and address in the country.

What does a valid Aadhaar look like? ▼

It is 12 digits, usually written in three groups of four, e.g. 2345 6789 0123. The first digit is always between 2 and 9, and the number carries a built-in check digit to catch typos.

How does this checker decide if an Aadhaar is valid? ▼

It confirms the number is 12 digits, that it does not start with 0 or 1, and that the built-in check digit is consistent with the rest of the number. This catches mistyped numbers but cannot confirm the Aadhaar is issued to a real person.

Is my Aadhaar number safe to enter here? ▼

Yes. The check runs entirely in your browser — your Aadhaar is never uploaded or stored. For extra privacy the tool only ever displays the number in masked form, showing just the last four digits.

Can a number pass this check but still be fake? ▼

Yes. A pass means the number is well-formed, not that it is a real, issued Aadhaar. Only UIDAI can confirm an Aadhaar is genuine, and that must be done through official channels.