Thumbnails (Thumb Lab)
Generate click-worthy thumbnails from a brief, a project, or a competitor reference.
Thumb Lab (in the top navigation) generates thumbnail variants from a short brief — standalone, or connected to one of your projects. Each variant costs a few credits (the exact price is shown next to the generate button); failed generations aren't charged.
The composer
Describe what the thumbnail should communicate, pick an aspect ratio (16:9, 9:16, or 1:1) and how many variants to generate, and go. Style chips (Top 10 list, Documentary, How-to tutorial, Reaction, Explainer) prime the look; "Use my prompt exactly" makes Thumb Lab follow your wording verbatim instead of expanding it.
The + menu attaches context to the generation:
- Project — pull the topic and context straight from one of your videos
- Reference images — up to 10 of your own images to guide composition
- YouTube sample — paste any video URL and its thumbnail becomes a visual reference
Generating
Variants generate in parallel, typically 30–180 seconds each, going through researching → drafting → rendering stages.
Recent sessions are kept in the Recents panel, so you can reopen and iterate on any brief later.
Reusable styles
Save a style once and reuse it across your channel: leave the description blank for Auto mode (researches competitors for the topic) or write it out for Template mode (follows your description verbatim), optionally with reference images.
From a project
You don't have to leave your project: the Thumbnails tab on the project page generates variants from the project brief directly, and the create page can queue thumbnail generation for every new video with your chosen style.
The YouTube kit's selected title feeds thumbnail generation — pick your title first and the thumbnails will match its promise.