Creative & Ads
THUMBNAIL_INVALIDInvalid Thumbnail
CreativeVideoAd Review
The custom thumbnail image you selected for your video ad doesn't meet format or dimension requirements, or it doesn't match the video's aspect ratio.
What causes this error?
The custom thumbnail image you selected for your video ad doesn’t meet format or dimension requirements, or it doesn’t match the video’s aspect ratio.
How to fix it
Generate a new thumbnail that matches the video’s aspect ratio. TikTok can auto-generate thumbnails from video frames—use this as a fallback. If providing a custom thumbnail, ensure it’s JPG/PNG and matches the video dimensions.
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