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.

JFIF Density Standard • 300 / 600 DPI Converter

Change Image DPI to 300 DPI Online Free

Convert image resolution from 72 DPI to 300 or 600 DPI without quality loss. Binary JFIF density marker rewriting for passport photos, exam portals, and print labs.

Convert Image DPI to 300 / 600 DPI

Upload your image to inspect current resolution and convert to 300 DPI for official portal compliance.

Select Image to Change DPI

✓ RFC-Compliant JFIF Marker•✓ Zero Quality Compression Loss•✓ 100% In-Browser Privacy

Why 300 DPI Is Required Everywhere

Passports & Visas

U.S. Dept of State, UK HM Passport Office, and Schengen portals automatically reject images lacking 300 DPI headers.

Exam Portals (UPSC/SSC)

Recruitment verification servers check metadata density. 300 DPI ensures crisp printing on candidate hall tickets.

Professional Printing

Commercial photo kiosks (CVS, Walgreens, Boots) print at 300 DPI to avoid pixelated or blurry paper photos.

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Frequently Asked Questions (Image DPI Converter)

Everything you need to know about image DPI and resolution.

What does changing DPI actually do to an image?

DPI (Dots Per Inch) is a metadata tag inside the image file (JFIF APP0 marker) that instructs printers and portal verification engines how many pixels to render per linear inch. Changing the DPI from 72 to 300 sets this tag to 300 dots per inch without altering or degrading your actual image pixel data.

Why do government exam and passport portals reject 72 DPI images?

Standard web images and smartphone screenshots are automatically saved with a default 72 or 96 DPI metadata tag. Official government portals (like UPSC, SSC, US Visa DS-160, and Passport Seva) scan the binary JFIF header and reject files that fail to declare 300 DPI or 200 DPI resolution.

Does changing DPI from 72 to 300 increase my file size?

No. Because Kagazo rewrites the internal JFIF density bytes (`0xFFE0`) directly rather than artificially upscaling blank pixels, your image sharpness is preserved without unnecessarily inflating your file size.

Which DPI should I choose for print versus web submissions?

Choose 300 DPI for all official passport photos, visa applications, government hall tickets, and photo lab prints. Choose 600 DPI for high-definition archival scans, fine biometric finger impressions, and legal evidence.