Shorts competes in the same feed as long-form content. FatThumb keeps your face and visual brand identical across your Shorts covers and long-form thumbnails so your channel looks like a single series.
How it works
Write the prompt for the cover frame you want: expression, background, any overlay text. Specify the vertical composition if you want the frame to suit the 9:16 feed layout.
Select the Person profile you use for long-form thumbnails. Your face stays consistent across both formats — viewers recognise you across the full channel.
Receive 1–4 variations and pick the one that reads best at mobile size. Download the 1280×720 PNG — you can upload it directly or crop to vertical for Shorts depending on your setup.
Features
One Person profile, two formats. Your face stays identical whether the thumbnail is for a 15-second Short or a full-length video.
Use the Inspiration Library to extract the style from your highest-performing long-form thumbnail and apply that same energy to your Shorts covers.
Shorts are consumed primarily on mobile. Choose composition templates with strong facial close-ups and high-contrast backgrounds that read in the small feed card.
Shorts publish faster than long-form. FatThumb keeps your cover-image workflow just as fast — describe the shot, generate, done.
Viewers who discover you via Shorts should immediately recognise your long-form channel — same face, same colour energy, same brand cues.
FatThumb outputs 1280×720 PNG for every generation. For Shorts, you can upload this directly or crop to a vertical format — the cover image workflow varies by platform version, so check current YouTube Help Centre guidance.
FAQ
FatThumb outputs 1280×720 PNG for every generation, which works as a standard YouTube thumbnail. For Shorts cover images, the exact upload workflow and recommended dimensions can vary between the mobile app and YouTube Studio desktop — check current YouTube Help Centre guidance for Shorts covers, as this can change.
Unlike standard YouTube thumbnails (where 1280×720 is clearly documented), Shorts cover image behaviour is less consistent across platforms. Our free Thumbnail Resizer includes a 1080×1920 (9:16) preset that matches the Shorts vertical format. For current guidance, check the YouTube Help Centre.
Use the same Person profile across both formats. Optionally reference one of your best-performing long-form thumbnails in the Inspiration Library and apply its style to your Shorts prompt.
Yes. Run the same template or Inspiration reference across multiple prompts with the same Person profile. The format stays consistent while the specific shot changes per Short.
The current output is always 1280×720 (16:9), which YouTube accepts as the Shorts cover image. A vertical-crop for in-video overlay is out of scope for v1; the 16:9 cover is the actionable output.
Generate your first 5 thumbnails free — no card, no designer, your face consistent from the first run.