Conversion5 min readUpdated 2026-04-20
JPG vs PNG vs WebP: Which Image Format Should You Use & When?
Section 01
Why Form Portals Reject PNG Files
Many online application portals strictly require `.jpg` or `.jpeg` file extensions. If you upload a `.png` file, the portal script throws a "Format Not Supported" error.
Furthermore, PNG files store lossless pixel data, making a small photo 2MB to 5MB in size. Converting to JPG compresses the data down to under 100KB with zero visible difference.
You can use our [PNG to JPG](/png-to-jpg) converter tool to switch formats instantly without cloud uploads.
Official Reference Table
Reference Specifications & Dimensions
| Format | Compression Type | Transparency Support | Best Use Case |
|---|---|---|---|
| JPG / JPEG | Lossy | No (Fills white background) | Photos, Government Exam Forms, Visas |
| PNG | Lossless | Yes (Alpha channel) | Logos, Text Screenshots, Signatures |
| WebP | Lossy & Lossless | Yes | Website Images, Speed Optimization |
Scroll horizontally on mobile devices to view all table columns.
Summary • Key Takeaways
- JPG is best for complex photography and online portal form submissions.
- PNG is best for transparent logos, screenshots with sharp text, and graphics.
- WebP is Google modern format that is 25%–35% smaller than JPG for websites.
- Real Example: A 2.8 MB PNG graphics banner was converted to 340 KB JPG for form submission and 210 KB WebP for web publishing.
Frequently Asked Questions
Important answers regarding exam rules, dimensions, and optimization.
Can WebP be uploaded to government exam forms?
Not yet. Most official portals still require standard JPG or PDF formats. Convert WebP to JPG using our [Universal Converter](/image-converter).
All PixEnhance utilities operate locally inside your browser via WebAssembly and Canvas. Zero upload waiting queues.
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