Creating a great YouTube thumbnail is only half of the equation. The other half is knowing exactly how to upload it to YouTube correctly so that it appears properly on your video across all devices and viewing contexts. Surprisingly many creators who invest time in creating custom thumbnails make mistakes in the upload process that result in their thumbnails not displaying correctly.
In this comprehensive step by step guide we will cover everything you need to know about uploading custom thumbnails to YouTube including account verification requirements how to upload thumbnails to new videos how to change thumbnails on existing videos thumbnail troubleshooting and best practices for ongoing thumbnail management.
Before You Start: Account Verification Requirements
YouTube requires your account to be verified before you can upload custom thumbnails. This is a security measure designed to prevent spam and ensure that custom thumbnail privileges are used responsibly. Without verification the custom thumbnail upload option will not appear in your video settings and you will only be able to choose from YouTube's auto-generated options.
Verifying your YouTube account is a simple process that takes approximately three to five minutes. Navigate to youtube.com/verify while signed in to your YouTube account. Select your country from the dropdown menu. Choose whether you want to receive your verification code via text message or phone call. Enter your phone number and click Get Code. Enter the six-digit code you receive and click Submit.
Your account will be verified immediately upon successful code submission. The custom thumbnail upload option will become available on your next video upload or when you edit existing videos.
Note that YouTube account verification is separate from Google account verification and channel monetisation verification. Verifying your account for custom thumbnails does not affect your monetisation status or any other account features.
How to Upload a Thumbnail When Publishing a New Video
The most convenient time to upload a custom thumbnail is during the initial video upload process before you publish the video. Here is the complete process.
Begin uploading your video through YouTube Studio by clicking the camera icon with a plus symbol at the top right of the YouTube interface or by navigating to studio.youtube.com and clicking Create then Upload videos.
After selecting your video file YouTube will begin the upload and processing process. While your video is uploading you can begin filling in the details including title description and other metadata. The thumbnail section will appear below the title and description fields.
In the thumbnail section you will see the three auto-generated thumbnail options that YouTube has created from frames in your video. Immediately below these auto-generated options you will see the Upload thumbnail button.
Click Upload thumbnail and your device's file browser will open. Navigate to the location where your custom thumbnail is saved. Select the thumbnail file and click Open or Choose.
Your custom thumbnail will appear in the thumbnail section replacing the previously selected auto-generated option. Verify that the thumbnail looks correct in the preview and make any necessary adjustments to your video metadata before proceeding.
Complete the remaining upload steps including adding tags selecting a playlist and configuring any other settings. Click Next through any additional configuration steps and then Publish to make your video live with your custom thumbnail displayed.
How to Change a Thumbnail on an Existing Video
Changing the thumbnail on an already published video is a straightforward process through YouTube Studio and can be done at any time. This is particularly useful for improving the thumbnails on older videos that are underperforming.
Navigate to studio.youtube.com and sign in to your YouTube account. Click Content in the left sidebar to access your video library. Find the video whose thumbnail you want to change and click the video thumbnail or title to open the video details editor.
In the video details editor scroll down to find the Thumbnail section. You will see the current thumbnail displayed along with the three auto-generated options. Click Upload thumbnail to select a new image from your device.
After selecting and uploading your new thumbnail click Save in the top right corner of the video details editor to apply the changes. Your new thumbnail will typically begin appearing within a few minutes though in some cases it can take up to several hours for the change to propagate across all YouTube surfaces.
Thumbnail File Requirements and Best Practices
To upload successfully your thumbnail must meet YouTube's technical requirements. Understanding these requirements prevents upload failures and ensures your thumbnail displays correctly.
File size must not exceed two megabytes. This limit is applied to the actual file size of the image not its pixel dimensions. JPG format is recommended because it achieves smaller file sizes than PNG while maintaining sufficient visual quality for thumbnails.
Accepted file formats include JPG JPEG PNG GIF and BMP. Avoid using animated GIFs as YouTube will only display the first frame as a static image.
Pixel dimensions should be 1280 by 720 pixels for regular videos and 1080 by 1920 pixels for Shorts. While YouTube will accept thumbnails at other sizes using these exact dimensions ensures optimal display quality across all devices and viewing contexts.
Aspect ratio should be 16 by 9 for regular videos and 9 by 16 for Shorts. Using the wrong aspect ratio will cause YouTube to crop your thumbnail which may cut off important visual elements.
Create your thumbnails at exactly the right dimensions using our free Thumbnail Maker at epickflicks.com which automatically downloads thumbnails at the correct size and format for immediate YouTube upload.