ThumbGen 1.0 Beta

First public beta of ThumbGen, a local AI YouTube thumbnail studio for Windows. ThumbGen is invite-only, and this beta is free for everyone.

Install

1. Download ThumbGen.exe below and run it. There's no installer.
2. If Windows shows "Windows protected your PC", click More info → Run anyway. The beta isn't code-signed yet.
3. Pick your AI models on first launch. They download once, then ThumbGen works offline.

What's included

• Create mode:
  • AI backgrounds with style presets and variations
  • reference images (style, palette, layout)
  • subject cut-out
• Edit mode: a Photoshop-style editor with layers, masks, blend modes, brushes, selections, transform, crop, adjustments and history.
• AI tools:
  • magic eraser
  • edit text baked into images
  • background remover (photos and cartoon/game art)
  • character generator
  • repaint for faces and outfits
  • 4× upscale
• Import: open files, paste images (Ctrl+V), or paste a YouTube link.
• Export: JPG under 2 MB, PNG, WebP or layered PSD, in several sizes at once.

Requirements

• Windows 10/11 64-bit
• 8 GB RAM (16 GB recommended)
• about 3.5 GB of disk space for models
• no GPU needed

Pro version coming soon.