Why does my government PDF show a yellow question mark?

Indian government PDFs are digitally signed using certificates from NIC, eMudhra, or other CCA India licensed authorities. Adobe Acrobat and most PDF viewers don't include India's Root Certifying Authority (RCAI) in their default trusted certificate store. So even though the signature is completely valid and legally recognised under the Information Technology Act 2000, your PDF viewer shows a yellow question mark because it cannot automatically verify the issuer. Kagazo checks your PDF against the actual CCA India trust hierarchy and gives you a copy with a permanent green tick visible on any device.

Is my document safe? Do you store my PDF?

Your PDF is processed entirely in memory during verification. We never write your file to disk, never store it on our servers, and never share it with any third party. The file is deleted from memory immediately after verification is complete. You can also verify this by checking our open source backend code.

Which documents does Kagazo support?

Kagazo supports any PDF digitally signed under India's CCA certificate hierarchy. This includes e-Aadhaar, PAN card, DigiLocker documents, ITR-V, Form 16, and all state government certificates from Tamil Nadu e-District, AP and Telangana MeeSeva, Karnataka Nadakacheri and eJanma, Kerala Sevana portal, and more.

My Aadhaar PDF is password protected. Will it work?

Yes. Enter your Aadhaar password (first four letters of your name in capital letters followed by your birth year, for example RAMA1995) in the password field that appears after you upload your e-Aadhaar PDF. We decrypt it in memory, verify the signature, and return a verified copy.

What is the difference between "Signature Valid" and "Signature Unknown"?

Signature Valid means the document is genuinely issued by the government authority and has not been modified. Signature Unknown means your PDF viewer cannot verify the certificate chain — this is a viewer configuration issue, not a problem with your document. Signature Invalid means the document may have been tampered with or re-saved after signing.

Does this work on mobile?

Yes. Kagazo is fully mobile responsive and works on any Android or iOS browser. No app installation required. Simply open kagazo.in on your phone browser, upload your PDF and verify instantly.

OFFICIAL PURE WHITE (#FFFFFF) • 300 DPI JFIF • 100% FREE

Convert Photo Background to White for Passport & Visa

Transform any home photograph into an official government-compliant passport photo with a pure studio white background (#FFFFFF) or light blue backdrop. Automatically injects the mandatory 300 DPI binary JFIF marker for Passport Seva Kendra, US Visa (DS-160), and Schengen Visa acceptance.

Pure White (#FFFFFF) ICAO Doc 9303 Compliant Embedded 300 DPI Header 100% Local Device Privacy

Drop Passport / Visa Photo Here

Supports JPG, PNG, and WebP up to 4K resolution. Full HD output, 100% free, zero cloud upload.

Full HD Original Resolution No 500px Limit Batch Processing

Official Passport Background Color Rules by Country

Verified background color requirements across major immigration and passport authorities.

Authority / Country	Mandatory Background Color	Standard Size	DPI Requirement
India (Passport Seva Kendra)	Pure Plain White (No shadows or borders)	35 × 45 mm	300 DPI
United States (USCIS / DS-160)	Pure Plain White or Off-White	2 × 2 inches (600×600 px)	300 DPI
Schengen Visa (Europe 27 States)	Light Grey or Plain White	35 × 45 mm	300 DPI
United Kingdom (HM Passport Office)	Plain Light Grey or Cream	35 × 45 mm	300 DPI
Malaysia / Singapore / UAE	Light Blue (#B0C4DE) or Plain White	35 × 50 mm / 35 × 45 mm	300 DPI

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Frequently Asked Questions

Frequently asked questions about passport photo white background compliance.

01.Why do passport offices strictly require a pure white background?

ICAO (International Civil Aviation Organization) Doc 9303 biometric standard mandates a plain, uniform white or light grey background without patterns, shadows, or reflections. This ensures automated airport e-Gates and facial recognition algorithms can accurately calculate facial feature coordinates without background interference.

02.Does this tool inject the mandatory 300 DPI resolution header?

Yes! Passport Seva Kendra (India), USCIS (US Visa), and consular portals inspect the internal JFIF metadata marker. Kagazo automatically injects the RFC-compliant 300 DPI (0x012C) binary marker into the saved JPEG file, preventing portal rejection for "insufficient print resolution".

03.Which countries require a light blue background instead of white?

Countries including Malaysia, Singapore (ICA), UAE (Federal Authority for Identity), Kuwait, and Oman require or accept light blue backgrounds for tourist or employment visas. In the studio panel, simply click "Passport Blue (#B0C4DE)" to generate compliant blue backgrounds.

04.Can I use a casual photo taken at home against a wall?

Yes! Stand 2-3 feet in front of any wall in a well-lit room. Our in-browser segmentation algorithm detects your face, hair, and clothing, cleanly strips away wall textures, yellow room lighting, and background shadows, and replaces them with an official, uniform studio white background.

05.Are my passport photos saved or sent to any server?

Never. Kagazo processes all image transformations entirely within your browser’s volatile RAM memory using client-side WebAssembly and HTML5 Canvas. Zero bytes leave your device, ensuring total privacy for your identity documents.