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 Google CDN Direct Endpoints • 1080p & 4K

YouTube Thumbnail Downloader HD / 4K

Download high-definition video thumbnails from any YouTube video or Shorts. Grab uncompressed 1080p (maxresdefault) covers, convert to WebP, or copy directly to clipboard.

Instant 1-Click Download WebP Fast Converter 100% Free & Private

Enter YouTube Video Link or Video ID

Paste any YouTube video link, Shorts URL, youtu.be short link, or 11-digit video ID.

Try Samples:

YouTube Thumbnail CDN Specifications Guide

Standard image endpoints provided by Google for creator thumbnails.

Filename	Resolution	Aspect Ratio	Quality Level
maxresdefault.jpg	1920 × 1080 / 1280 × 720	16:9 Widescreen	Full HD (Best Quality)
sddefault.jpg	640 × 480	4:3 Standard	Standard Definition
hqdefault.jpg	480 × 360	4:3 Standard	High Quality (Universal)
mqdefault.jpg	320 × 180	16:9 Widescreen	Medium Quality (Mobile)

Frequently Asked Questions

Answers to common questions about extracting and using YouTube covers.

How do I download a YouTube thumbnail in 1080p Full HD?

Paste the YouTube video link into the search box and click "Get Thumbnails". If the creator uploaded a 1080p/720p custom thumbnail, it will appear under "Maximum Resolution (1080p / 720p)". Click "Download JPG" to save the uncompressed file directly to your phone or computer.

Can I download thumbnails from YouTube Shorts?

Yes. Simply copy the share link from any YouTube Shorts video (e.g. youtube.com/shorts/...) and paste it into Kagazo. Our engine automatically parses the unique 11-character video ID.

Is downloading YouTube thumbnails legal?

Yes, YouTube thumbnails are publicly accessible assets hosted on Google’s content delivery network (img.youtube.com). You may download them for personal reference, fair-use analysis, inspiration, or archival purposes.

Why do some older YouTube videos lack a 1080p (maxresdefault) thumbnail?

Older YouTube videos (especially those uploaded before 2012) or videos where the uploader never assigned a custom high-resolution cover may only have 480×360 (HQ) or 640×480 (SD) auto-generated captures from the video stream.