Educational content — whether for e-learning platforms, school websites, or digital classroom materials — requires images at the right size for clarity and fast loading. This guide covers the exact specifications for Udemy Courses and shows you how to optimise your images to the correct dimensions using the free tools at imgresizr.com.
Image Specifications for Udemy Courses
| Use Case | Dimensions |
|---|---|
| E-learning slide image | 1920 × 1080 px |
| Course thumbnail | 1280 × 720 px |
| Infographic | 800 × 2000 px (portrait) |
| Profile photo | 400 × 400 px |
| Format | PNG for graphics, JPG for photos |
| File size (fast mobile load) | Under 300 KB |
How to Optimise Images for Udemy Courses at imgresizr.com
Upload your image to imgresizr.com. Select the Resize tab. Enter the correct dimensions for Udemy Courses as shown in the table above. Use the lock icon to maintain the aspect ratio if you only know one dimension. Click Resize to process your image. Download the result — your image is now correctly sized for Udemy Courses. All processing happens in your browser; your image is never uploaded to any server.
Tips for Udemy Courses
- Keep e-learning images accessible — all images need descriptive alt text for screen readers
- Use high-contrast images for educational infographics — content must be legible on all screen sizes
- Compress images for mobile learners — many students access e-learning on mobile data connections
- Consistent image style across course materials creates a professional, cohesive learning experience
- Use real photographs rather than stock images where possible — authenticity improves student engagement
Optimise images for Udemy Courses instantly, free at imgresizr.com.