Choosing the Optimal Source Format for Your PDF
When assembling photographs, scans, or graphic designs into a multi-page PDF, selecting between JPG and PNG fundamentally affects both document file size and visual fidelity.
Technical Comparison Matrix
| Feature | JPG (JPEG) | PNG |
|---|---|---|
| Compression Type | Lossy (Discrete Cosine Transform) | Lossless (DEFLATE / LZ77) |
| Best For | Real-world photography, smartphone scans, art | Technical schematics, screenshots, line drawings |
| File Size Impact | 5x to 10x smaller byte footprint | Larger file size due to pixel-exact encoding |
| Transparency Support | No (Opaque pixels only) | Yes (8-bit alpha channel) |
| Text Sharpness | High-contrast text can exhibit faint halo noise | Perfectly crisp pixel boundaries |
Practical Decision Rules
- For Identity Proofs, Resumes, and Scanned Documents: Convert to JPG first or upload JPG directly to keep the PDF well within portal upload limits.
- For Software Documentation & UI Screenshots: Use PNG to maintain razor-sharp text and interface icons.
- Execute Conversion: Compile your assets with our JPG to PDF converter.