A Udemy course image has one fast job: help a learner recognize the subject before opening the course landing page. When an instructor turns a detailed slide or desktop screenshot into a small marketplace card, the topic can disappear even if the file uploads successfully. The right Udemy course image size, a single focal subject, and a mobile-safe layout protect that first impression.
What the course image needs to communicate
The title and subtitle explain the curriculum elsewhere on the card. The image should supply an immediate visual cue: a spreadsheet for financial modeling, a camera for cinematography, or a clear human interaction for communication training. It is a promise of subject matter, not a miniature poster.
At search-card size
The main subject should remain identifiable without zooming. Competing objects and decorative detail weaken the signal.
On a phone
The central idea must survive Udemy's mobile crop. Edge decoration can disappear; the core subject cannot.
Current Udemy course image requirements
| Check | Current official guidance | Practical response |
|---|---|---|
| Dimensions | Minimum 750 × 422 px; maximum 6000 × 6000 px | Build on a 16:9-style canvas and follow Udemy's displayed content-safe area. |
| Accepted files | JPG, JPEG, GIF, BMP, or PNG | Use JPG or PNG for most still course images; do not assume WebP is accepted. |
| Mobile display | Every course image is cropped in the mobile app | Keep the focal subject central and test a tighter preview. |
| Text | The course name and other textual information are not permitted, with limited exceptions such as logos | Let Udemy's title field carry the wording. |
| Originality | Each course needs a unique, relevant image | Create a distinct visual rather than recycling one thumbnail. |
These Udemy course image requirements are only the acceptance baseline. A compliant image can still feel weak if the visual does not explain the course topic at card size.
Design for the course card and mobile crop
Start with one subject and give it negative space. Place the important face, object, or interface cue inside the content-safe area shown by Udemy rather than against an edge. Do not invent your own safe-margin percentage: use the current official diagram and inspect the mobile crop supplied by the platform.
Contrast should separate subject from background without harsh outlines or visual noise. A dark laptop on a dark desk may look polished at full size but merge into one shape in search. Temporarily shrink the canvas to a small card; if the subject no longer reads, simplify before export.
Why extra text and screenshots are risky
Udemy generally does not permit textual information such as the course name inside the image. Even apart from that rule, small type competes with the title already shown on the course card.
Screenshots often contain menus, labels, and controls that collapse during scaling. If the interface itself is essential, crop to one recognizable feature and remove private data. A simplified illustration or device mockup may explain the same topic more clearly.
Choose a format and compression level
JPG usually suits photography and textured backgrounds. PNG often preserves flat icons, clean shapes, and hard edges more reliably, though it can produce a larger file. To resize a Udemy course image, work from the largest clean source and export once. Repeatedly saving a JPG can create halos and block artifacts.
Source-to-upload workflow
- Write the course promise in one plain sentence.
- Choose one visual subject that expresses that promise.
- Compose it inside Udemy's content-safe area without course-title text.
- Keep the layered, vector, or high-resolution master unchanged.
- Export a supported RGB delivery copy.
- Review it at course-card and mobile-crop size.
- Upload, inspect the real landing page, and revise from the master if needed.
Final summary
A strong course image is technically valid, visually simple, relevant to one course, safe in the mobile crop, and readable without embedded title text. Judge the final upload where learners will encounter it, not only at full size in an editor.
Questions about Udemy course images
Udemy currently lists 750 × 422 pixels as the minimum and 6000 × 6000 pixels as the maximum. Confirm these values in the current instructor guidance before uploading.
Udemy's quality standards say textual information such as the course name is not permitted. Limited exceptions exist for items such as logos, subject to the full rules.
No. Correct dimensions address one technical requirement. Udemy also reviews relevance, uniqueness, clarity, appropriateness, text use, and other quality factors; sales depend on many parts of the course offer.
