Online learning platforms — Moodle, Teachable, Thinkific, Udemy, and others — serve students on a range of devices and internet speeds. Poorly optimised images slow course loading, frustrate students, and can even affect completion rates. At imgresizr.com, you can optimise images for any e-learning platform — correct format, size, and compression — completely free.
Image Optimisation Standards for E-Learning
| Platform | Max Recommended File Size | Ideal Width |
|---|---|---|
| Moodle | 500KB per image | 800–1000px |
| Teachable | 2MB max | 1920px for headers |
| Thinkific | 2MB max | 1920px for course covers |
| Udemy | 4MB max | 2048×1152px for thumbnails |
How to Optimise E-Learning Images at imgresizr.com
Upload your image to imgresizr.com. For lesson or module content images, use the Resize tool to set 800–1000px wide — this provides crisp detail on all screen sizes without slowing page loads. For course cover or thumbnail images, resize to the platform's specified dimensions. Convert images to JPG for photographs and diagrams, PNG for graphics with transparent backgrounds or logos. Use the Compress tool to reduce file size while maintaining visual quality — target under 500KB for course content images and under 1MB for promotional images. For platform-specific requirements, use the Resize tool to match exactly. Sharpen text-heavy images after compression to ensure readability.
E-Learning Image Optimisation Tips
- Test your course on a 4G mobile connection — this represents many students' access speed
- Use descriptive alt text when embedding images in course pages — accessibility and SEO both benefit
- Avoid GIF animations in lesson content — they are large files that distract from learning
- Consistent image styles across a course create a professional, credible learning experience
- Compress all images before upload — platforms often cannot compress after the fact
Optimise images for any online learning platform, free at imgresizr.com.