How to Choose a Thumbnail on TikTok? (2026 Step-by-Step Guide)

January 28, 2026

To choose a thumbnail, go to the final “Post” screen and tap “Edit cover” on your video preview. Slide the selector to pick a frame from your video or tap the “Upload” icon to select a custom image from your gallery. Tap “Save” to confirm your choice before posting.

This guide covers the technical process of thumbnail selection and common errors to avoid during this step as of January 2026.

Steps to Select or Upload a TikTok Thumbnail

Follow these instructions to set your video’s display image:

Prepare Your Video: Reach the final “Post” screen after completing the record or upload video phase.
Open the Cover Editor: Tap the “Edit cover” button on your video preview.
Select a Frame: Slide the red frame selector along the timeline to find a shot from your footage.
Upload a Custom Image: Tap the “Upload from gallery” icon on the left side of the timeline to use a pre-made image.
Confirm Selection: Tap “Save” in the top-right corner to return to the posting screen.

Common Thumbnail Selection Mistakes (Selection Errors)

To ensure your chosen thumbnail displays correctly, avoid these common technical errors during the selection process:

UI Overlay Obstruction: Selecting a frame where the main subject is in the bottom-right corner, where TikTok’s UI elements (like the caption or icons) will cover it.
Low-Contrast Selection: Choosing a dark or blurry frame that becomes unrecognizable when shrunk to the profile grid size.
Incorrect Custom Aspect Ratio: Uploading a custom image that isn’t 9:16, causing the app to crop or stretch your thumbnail unexpectedly.

Please note that the thumbnail you choose here acts as the permanent cover for your video on your profile grid. The selection is a one-time setup that cannot be changed once the video is published.

What This Does NOT Do

This feature is strictly for choosing which image represents your video; it does not provide graphic design tools or algorithm optimization strategies. For complex edits, you must prepare your image in a separate app before uploading.

Next Step: Now that you have chosen a thumbnail, the final task before hitting post is crafting a great TikTok caption to complement your content.