
The Complete Guide to Image Formatting for Websites: Requirements, Best Practices & Tips
Image files should be under 20MB, with 500KB or smaller recommended for faster page loading. For optimal display, upload high-quality images at least 2500px wide to ensure good scaling across devices.
Key image requirements:
- File formats: JPG, PNG, GIF
- Maximum file size: 20MB (500KB recommended)
- Minimum width: 1500px (2500px ideal)
- Maximum resolution: 120 megapixels
When images are uploaded, seven responsive versions are automatically created:
- 100px wide
- 300px wide
- 500px wide
- 750px wide
- 1000px wide
- 1500px wide
- 2500px wide
Best practices for image formatting:
- Use PNG format for logos and images needing transparency
- Save text-heavy images as PNG to maintain sharpness
- Match image aspect ratio to container shape to minimize cropping
- Use similar aspect ratios within galleries for consistent display
- Add alt text for accessibility and SEO
Troubleshooting common issues:
- Blurry images: Ensure width is at least 1500px
- Color distortion: Check color profile settings
- Mobile cropping: Consider responsive design limitations
- Upload errors: Verify file meets size/resolution requirements
For logos and icons:
- Browser favicon: 16x16px recommended
- Website logo: Varies by design but typically 250-400px wide
- Email marketing: Different requirements apply
Remember to:
- Preview on multiple devices
- Keep original files backed up
- Stay under 5MB total page size
- Use image compression when possible
- Test loading speeds after adding images
Always maintain aspect ratio when resizing to prevent distortion. Use built-in editing tools for minor adjustments after upload. Consider accessibility by including descriptive alt text for all images.
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