What is JPEG 2000?
JPEG 2000 (file extension .jp2 or .j2k) is an advanced image format developed by the Joint Photographic Experts Group. This format uses wavelet compression technology, providing higher image quality than standard JPEG with smaller file sizes.
Why Does the Government Portal Require JPEG 2000?
The Vietnam public service portal (dichvucong.gov.vn) requires passport photos in JPEG 2000 format because this is the international ICAO standard for biometric photos. This format ensures the best image quality for facial recognition.
Method 1: View on macOS & iOS (Easiest)
Good News for Apple Users!
macOS and iOS support JPEG 2000 natively. You don't need to install any additional software.
- On Mac: Double-click the .jp2 file → Opens automatically in Preview
- On iPhone/iPad: Open the .jp2 file in Files or Photos app → View directly
Method 2: View Online (For Windows & Android)
If you're using Windows or Android, the fastest way is to view the image online without installing any software:
Free Online Image Viewer
GroupDocs JP2 Viewer - Free online image viewer from GroupDocs (part of Aspose - a reputable software company). Your files are processed securely and automatically deleted after viewing.
How to Use
- Visit products.groupdocs.app/viewer/jp2
- Drag and drop your .jp2 file or click "Browse file"
- The image will display immediately in your browser
Method 3: Install Software (View Offline)
If you frequently work with .jp2 files and want to view them offline, you can install software:
On Windows
- IrfanView + Plugins - Free, lightweight software (requires Plugins download for JPEG 2000 support)
- XnView - Supports JPEG 2000 out of the box
On Android
- Photo Viewer for JP2 - Download from Google Play Store
- File Viewer for Android - Supports multiple formats
Important Note
When submitting documents through the government portal, you must keep the original JPEG 2000 (.jp2) format. Do not convert to other formats when submitting.
Frequently Asked Questions
Why can't my Windows computer open .jp2 files?
Windows doesn't support JPEG 2000 by default. You can use the GroupDocs online viewer, or install software like IrfanView or XnView.
Are .jp2 and .j2k files different?
Both are JPEG 2000 formats. The .jp2 file is the full format with metadata, while .j2k is the codestream format without metadata.
How do I create a JPEG 2000 photo for passport?
You can use Ảnh Thẻ service. Select the photo type "4x6 Passport Photo Online" - the system will automatically create the photo in ICAO-compliant JPEG 2000 format for submission through the public service portal.
Create Online Passport Photo Now
ICAO-compliant JPEG 2000 format - Submit directly to Public Service Portal
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