Photo Size and Scan Specifications for Aadhaar Updates

1. UIDAI Document Scanning Rules

The Unique Identification Authority of India (UIDAI) enforces strict guidelines for uploading supporting documents and photos to the Aadhaar self-service update portal. Unclear scans, incorrect file formats, or files exceeding size limits are common reasons for application rejection. Photos must be in JPEG or PNG format, with file sizes kept strictly under 20KB. Supporting identity and address proofs must be uploaded in PDF format with file sizes under 2MB. This guide details how to prepare compliant documents for the Aadhaar portal.

UIDAI requires supporting document scans to be high-contrast, with clear text and visible seals. Backgrounds should be white or light-colored, and the document must be aligned flat without skew or fold marks. For detailed instructions on preparing standard passport photos, read our guide on Preparing Passport Size Photos to align your portrait shots correctly.

2. Preparing Supporting Documents

When updating Aadhaar details, you must submit supporting documents such as birth certificates, marksheets, or rent agreements. If these documents are scanned in high-resolution color, the file sizes will exceed the 2MB portal limit. To fit these limits without losing document clarity, you should compress your PDFs. Our local Aadhaar Resizer helps you format address proofs and certificates to meet UIDAI guidelines.

2.1 Compressing PDF Proofs under 2MB

Our tool uses browser-side compression to downscale document files locally. It reduces resolution to a standard 150 DPI, which keeps text legible while shrinking the file size under the 2MB threshold. To optimize your document packages, use our local PDF Compressor Tool before uploading them to the portal.

3. Step-by-Step Aadhaar Document Preparation Guide

Follow these instructions to crop and resize your supporting documents locally using the Aadhaar Photo & Document Resizer:

1. Scan your supporting document in grayscale mode at 150 DPI resolution.
2. Open the Aadhaar Resizer Tool in your browser.
3. Upload the scanned PDF or JPEG file.
4. Choose the document category from the dropdown menu (e.g. "Identity Proof" or "Address Proof").
5. Use the crop frame to select the document boundaries, removing empty margin space.
6. Click "Optimize Document" and download the compliant file, verifying that it is under 2MB.

3.2 Preparing Identity Photos

For uploading passport photos to UIDAI forms, use our image resizer to scale your portrait to 3.5 cm x 4.5 cm (or 413 x 531 pixels) and compress it under 20KB. Ensure the background is solid white and your face is positioned in the center of the frame. This helps ensure successful verification and prevents delays.

4. Aadhaar Portal Document Specifications

The table below summarizes standard file requirements for Aadhaar portal uploads:

5. Secure and Private Local Document Sizing

Using our browser-based tools ensures that your identity papers, address proofs, and photos are not uploaded to remote servers. This protects your personal data from leaks. All calculations and compression algorithms run entirely on your device, providing a secure and fast tool for your document preparation.