
Formatting Images: Complete Guide to Website Image Requirements and Best Practices
Images must be properly formatted for optimal display across different screen sizes and devices. Here's what you need to know:
Core Requirements:
- Maximum file size: 20 MB (recommended: under 500 KB)
- Minimum width: 1500px (recommended: 2500px)
- Supported formats: JPG, PNG, GIF
- Color mode: RGB
- Resolution limit: 120 megapixels
Best Practices for Web Display:
- Upload high-quality images larger than your intended display size
- Use PNG format for images containing text or requiring transparency
- Match image aspect ratio to the container shape to minimize cropping
- Keep total page size under 5MB for faster loading
Responsive Design: Images are automatically converted into 7 different widths:
- 100px
- 300px
- 500px
- 750px
- 1000px
- 1500px
- 2500px
The system selects the appropriate version based on the visitor's device screen size.
Image Optimization Tips:
- Check file specifications before uploading
- Consider aspect ratios for consistent display
- Use transparent backgrounds when needed (PNG format)
- Add alt text for accessibility and SEO
- Avoid embedding text in images - use overlays instead
Troubleshooting Common Issues:
- Blurry images: Check if width is at least 1500px
- Cropping issues: Match aspect ratio to container
- Color distortion: Verify RGB color mode
- Upload errors: Ensure file meets size and resolution limits
For logos and icons:
- Use different specifications for website logos
- Follow special requirements for browser favicon
- Consider square aspect ratios for consistent display
Remember to keep original files on your computer as a backup since uploaded images may be compressed or modified during processing.