ThumbBlox
Describe your Roblox game in one sentence and generate original 16:9 thumbnails for your experience page for free.
About ThumbBlox
ThumbBlox is a thumbnail generator built for Roblox experience pages. Users describe their game in a single sentence, and the tool generates an original 16:9 image suited for the experience page — no need to set up a camera in Roblox Studio, and no Blender or Photoshop required. Generation is billed by resolution (1K/2K/4K), images can be further refined, and the tool offers platform options including Roblox, Minecraft, Unity, and Fortnite, along with multiple visual styles. The official page states that the tool is designed for the experience page itself and can be used before any footage has been recorded.
Best for
Best use cases
Creating the hero thumbnail for a Roblox experience page
Preparing experience page images in advance before any game footage has been recorded
Generating or refining thumbnail images at 1K/2K/4K resolutions
Compare before choosing
The official comparison page states: most AI thumbnail tools are designed for YouTube and adapted to Roblox pages, exporting 1280x720 for already-recorded videos; ThumbBlox is instead designed for the experience page itself and can be used before any footage is recorded.
Features
One-sentence 16:9 thumbnail generation
Describe your game in one sentence and generate an original 16:9 thumbnail suited for the experience page — no Studio camera, Blender, or Photoshop required.
Resolution-based credit system
Generation costs are based on resolution: 1K uses 10 credits, 2K uses 40 credits, and 4K uses 60 credits, with new scenes and refinement adjustments at the same rates.
Multi-platform and style options
Offers platform options for Roblox, Minecraft, Unity, and Fortnite, plus visual styles such as automatic, horror, cartoon, anime, and survival.
Private generation and commercial license
Images generated on Starter and higher paid plans are private by default (can be switched to public) and come with a commercial license.
Pros
- No Roblox Studio camera, Blender, or Photoshop needed — describe your game in one sentence to generate a 16:9 experience page thumbnail
- Supports 1K, 2K, and 4K output resolutions, with further refinement adjustments available for images
- Try the generator for free with no card required
- Payment is a one-time credit pack, with no subscription
Cons
- Images and prompts generated for free are shown in a public gallery and do not include commercial licensing.
- Purchased credits have an expiry date and expire after 1 year; they must be used within that period.
Pricing Plans
Starter
- 500 credits
- About 50 1K generations
- Private by default, with an optional public switch
- Commercial-use license for paid generations
- Credits stay valid for 365 days
Creator
- 1,600 credits
- About 160 1K generations
- Private by default, with an optional public switch
- Commercial-use license for paid generations
- Credits stay valid for 365 days
* Pricing information is for reference only. Please refer to the latest announcement on ThumbBlox's official website.