Aadhaar Signature Verification Online - Free e-Aadhaar Digital Signature Validator

Verify your official downloaded e-Aadhaar PDF digital signature online for free. Instantly inspect cryptographic certificate details, check PKCS#7 / CAdES signature status, verify document integrity, and learn how to turn the yellow question mark (?) into a valid green check mark (✔) in Adobe Acrobat Reader.

What is e-Aadhaar Digital Signature Verification?

When you download your electronic Aadhaar card (e-Aadhaar) from the official UIDAI portal (myAadhaar / eaadhaar.uidai.gov.in), the document comes digitally signed by the Unique Identification Authority of India (UIDAI) using an official cryptographic signing certificate issued under CCA India (Controller of Certifying Authorities).

Because modern web browsers and desktop PDF viewers (like Adobe Acrobat Reader) do not include UIDAI's root certificate in their default operating system trust store, the digital signature often displays as:

• "Validity Unknown (?)" with a yellow question mark logo.
• "Signature Unverified" banner.

Our Aadhaar Signature Verifier reads the embedded PKCS#7 signature bytes inside your e-Aadhaar PDF client-side to confirm that the signature is authentic and that your PDF has not been altered or tampered with.

Key Features of Our Online Aadhaar Signature Verifier

• 100% Client-Side Privacy: Your e-Aadhaar PDF file is processed entirely within your browser engine using local JavaScript. No files or personal identity data are ever uploaded to external servers.
• Password Protected PDF Support: Easily unlock encrypted e-Aadhaar PDFs using your standard Aadhaar password format (First 4 letters of name in CAPITAL + 4-digit Birth Year).
• Cryptographic Byte-Range Audit: Verifies that 0 modifications have occurred after UIDAI placed the digital signature digest.
• Signer Certificate Inspection: View the exact Signer Name (e.g., DS UNIQUE IDENTIFICATION AUTHORITY OF INDIA 04), Authority, Issuer (CCA India / NIC CA), and Timestamp.
• Instant Demo Evaluation: Test the signature verification process instantly with a pre-configured sample e-Aadhaar signature structure.

How to Verify Your e-Aadhaar Digital Signature Online

1. Upload your e-Aadhaar PDF: Drag & drop your downloaded PDF file into the dropzone or click to select from your device.
2. Enter PDF Password (if prompted): If your e-Aadhaar is encrypted, enter your standard password (e.g. ANUR1995 for Anurag born in 1995).
3. Inspect Verification Status: Review the audit panel to confirm whether the digital signature digest is valid and authentic.
4. Follow Adobe Reader Steps: Use our interactive 4-step guide below to configure Adobe Acrobat Reader to show a permanent green check mark (✔) on your computer.

How to Convert Yellow Question Mark (?) into Green Checkmark (✔) in Adobe Acrobat Reader

If you want your printed or saved e-Aadhaar PDF to display the green checkmark (✔ Signature Valid) directly inside Adobe Reader, follow these simple setup steps once:

1. Open Document: Right-click your e-Aadhaar PDF and open it in Adobe Acrobat Reader.
2. Right-Click Signature: Click on the signature box displaying the yellow ? mark and select "Validate Signature".
3. Open Signature Properties: Click "Signature Properties..." -> "Show Signer's Certificate...".
4. Add to Trusted Certificates:
   • Go to the "Trust" tab.
   • Click "Add to Trusted Certificates..." and click OK.
   • Select the checkbox: "Use this certificate as a trusted root".
   • Click OK to close all certificate dialog boxes.
5. Revalidate: Click "Revalidate Signature". The signature status will immediately turn into "Signature Valid ✔".

Frequently Asked Questions (FAQs)

Is it safe to upload my e-Aadhaar card to this tool?

Yes, absolutely! Our tool operates 100% client-side. Your PDF is read in your browser memory using HTML5 File APIs. Zero data, byte ranges, or identity details are sent over the internet or saved to any server.

What is the password to open my e-Aadhaar PDF?

The default password format for UIDAI e-Aadhaar PDFs consists of 8 characters:

• First 4 letters of your name as per Aadhaar in CAPITAL / UPPERCASE.
• Your 4-digit birth year (YYYY).
• Example: Name: SURESH KUMAR, Birth Year: 1990 -> Password: SURE1990.

Is an e-Aadhaar with a yellow question mark (?) legally valid in India?

Yes! As per Section 4 of the Information Technology Act, 2000, e-Aadhaar downloaded from the official UIDAI website is a legally valid document across all government institutions, banks, telecom operators, and official verifications in India, regardless of whether the signature displays a yellow ? or a green ✔.

Why does the signature show "Validity Unknown"?

"Validity Unknown" simply means that Adobe Reader on your device has not yet downloaded or trusted the National Informatics Centre (NIC) / UIDAI Root Certificate Authority. Adding UIDAI to your Adobe Reader trust store resolves this immediately.

TinyTool provides free, privacy-first web utilities. Bookmark this page for quick e-Aadhaar verification whenever you download a fresh copy from UIDAI!