How Images Are Optimized for Web Display: A Guide to Formatting
Web Image Formatting Guide
Images play a crucial role in website performance and user experience. Here's what you need to know about formatting images for the web:
Key Image Requirements
- Maximum file size: 20 MB (recommended: under 500 KB)
- Optimal width: 2500px (minimum: 1500px to avoid blurriness)
- Supported formats: JPG, PNG, GIF
- Color mode: RGB
- Resolution limit: 120 MP
Best Practices for Web Images
- Size and Quality
- Upload high-quality images larger than your display needs
- Aim for 2500px width for optimal display across devices
- Keep page size under 5MB for faster loading
- Use PNG format for images containing text or requiring transparency
- Responsive Design Considerations Squarespace automatically creates seven image variations for different screen sizes:
- 100px
- 300px
- 500px
- 750px
- 1000px
- 1500px
- 2500px
- Image Shape and Display
- Match image aspect ratio to container shape
- Use consistent image shapes in galleries
- Consider mobile cropping for banner images
- Set focal points for important image elements
Accessibility and SEO
- Add descriptive alt text for better accessibility
- Use overlay text instead of embedding text in images
- Maintain original files after uploading
- Optimize file names for SEO
Troubleshooting Common Issues
If images appear blurry:
- Ensure width is at least 1500px
- Check original image quality
- Verify correct file format
For color distortion:
- Confirm RGB color mode
- Check color profile settings
- Ensure proper file format
Mobile Display Considerations
- Banner images typically crop on mobile devices
- Use responsive design principles
- Test across different devices
- Consider mobile-first design approach
By following these guidelines, your images will display optimally across all devices while maintaining fast loading times and visual quality.