AI Prompt Free

Nano Banana prompt generator

Turn a visual idea into a copyable Nano Banana prompt. Choose a new image or a reference edit, then describe the subject, intended changes, and details to keep. Free with usage limits; no account required.

Your idea

0 / 4,000

Describe the subject, exact text, and anything to preserve. For edits, add the reference image later in Gemini. This tool writes the prompt.

More control (optional)

Add only the details that matter. Fields not applicable to the selected mode are excluded.

No sign-up. Free-model routes have no site quota; other routes have usage limits. Inputs are processed by an AI provider.

Your prompt

Your result will appear here

Describe what you need, or load an example. You can edit and export the result.

Up to 3 previous results stay in this page session. Refreshing clears them.

Examples to make your own

Your idea

Create a square product photo of a blue ceramic mug on a pale oak table, softly lit from the left.

A more useful prompt

Create a square product photograph of a blue ceramic mug on a pale oak tabletop. Frame the entire mug with breathing room around the handle. Use soft window light from the left, a gentle shadow to the right, and a quiet cream background. Preserve a natural ceramic texture. Do not add lettering or extra objects.

Your idea

Edit a reference photo: replace the background with a warm cream studio wall while keeping the mug unchanged.

A more useful prompt

Edit the supplied reference image by replacing only the background with a warm cream studio wall. Preserve the mug’s shape, blue glaze, handle, markings, scale, and position. Match the new background lighting to the existing subject. Keep the square crop and a natural contact shadow. Do not redesign the mug.

Describe changes and preservation separately

For a new image, state the subject, setting, composition and lighting. For an edit, list the change and the features that must stay the same. If lettering matters, quote the exact words and describe their position. Framing is a creative instruction, not a guarantee of exact output dimensions.

How to use the result in Gemini

Copy the prompt into a Gemini image workflow. For an edit, attach your reference image there; this text-based builder does not inspect it. Review the generated image for lettering and subject consistency, then refine one change at a time. This is an independent prompt tool, not a Google product.

Does this create images?

This page generates editable text prompts only. Image generation happens in your chosen application and is subject to its availability and usage limits. The examples illustrate prompt structure; results depend on your reference image, model and settings.