Nano Banana 2.1 is a browser-based image studio at nanobanana-21.com that wraps Google's gemini-nano-banana-2.1 model, which the page describes as a Flash-tier model in the Gemini 3 family. It generates images from text and edits uploaded photos at 1K, 2K or 4K, accepting up to 14 reference images per request. The site states that no API key, code or GPU is required: you sign in, write a prompt, choose an aspect ratio and resolution, and generate.
Key Features
- Text-to-image generation at 1K, 2K or 4K, with a prompt field capped at 4,000 characters and a "Surprise me" prompt filler.
- Local photo edits — upload an image and describe a single change (recolor a wall, remove an object, swap a sky) while the rest of the picture is preserved.
- Multi-image fusion — combine people, outfits, props and styles from up to 14 reference images into one scene.
- Product recontextualization — place a product into a new setting while keeping its shape, label and finish.
- Readable text rendering for signs, posters, menus, maps and charts, with quoted wording in the prompt.
- Consistent characters — keep one face, outfit and style across a series of images.
- Four studio modes selectable as tabs: Text to image, Edit an image, Multi-image fusion, and Product shot.
- 14 aspect ratios from 1:8 to 8:1, including 1:1, 16:9, 9:16, 4:5, 21:9, 4:1 and 8:1.
