NB2 Hub

NB2 Hub is a free online platform using Google's Nano Banana 2 AI model (built on Gemini 2.5 Flash Image) to generate 4K-quality images from text prompts or existing images in under 10 seconds.

What is NB2 Hub?

NB2 Hub is a free online tool for text-to-image and image-to-image generation powered by Google's Nano Banana 2 AI model. Users input a text prompt or upload an image, and the model produces a 4K-quality image in under 10 seconds. The platform runs entirely in the browser and is created by an unspecified developer or team, with no download required.

Key Features

• Strong character consistency — The model maintains uniform character appearance across multiple generations, crucial for narratives, branding, and character design.
• Faithful remastering — Old or low-resolution images are restored with pixel-level precision, preserving original details while enhancing quality.
• Layout understanding — Text-heavy compositions, such as posters or slides, are generated with accurate spatial arrangement and readable text (English and Chinese supported).
• 4K-quality results — Output images are up to 4K resolution, generated in under 10 seconds.
• Multi-language support — The interface and generation are available in English and Chinese.
• Free tier with 2 generations — New users can try the tool with two free generations; paid plans offer higher usage limits.

Who is it for?

Designers can quickly generate concept art, mood boards, or product mockups. Content creators can produce custom illustrations, thumbnails, or social media visuals without licensing fees. Developers can integrate rapid visual asset creation into workflows, using the API or web interface for prototyping.

What can you do with NB2 Hub?

• Generate images from text — Type a descriptive prompt and receive a 4K image in seconds.
• Remaster old images — Upload a low-res or damaged photo to get a pixel-level restored version.
• Create text-heavy visuals — Generate posters, banners, or slides with accurate text layout in English or Chinese.
• Maintain character identity — Produce consistent characters across multiple scenes for comics or games.

Pricing

NB2 Hub is freemium: a free tier includes 2 generations, and paid plans provide higher volume. Exact pricing is not disclosed on the site.

FAQ

Is NB2 Hub free?

Yes, it offers a free tier with 2 generations. After that, paid plans are required for continued use.

What AI model does NB2 Hub use?

It uses Google's Nano Banana 2 model, built on Gemini 2.5 Flash Image technology.

What languages does NB2 Hub support?

The tool supports English and Chinese for both prompts and layout generation.

How fast is image generation?

Images are generated in under 10 seconds, even at 4K resolution.