keyline

$29Starting price

0Popularity

About keyline

keyline is a browser-based tool that generates a single visual direction from a set of reference images. Users drop up to 20 images into the interface, where the tool composes them into a board and analyzes their visual properties such as palette, contrast, light, material, era, and mood. The compiled output is a detailed prompt with a [SUBJECT] slot that can be used with any image generation model, including ChatGPT, Claude, Midjourney, or others. The prompt is designed to maintain the user’s intended style regardless of the subject or model used. The tool measures eight color values with real weights from the reference pixels and provides a contrast score. Layouts are deterministic and can be reproduced with the same seed. The compiled prompt is displayed on screen and can be copied for immediate use. keyline operates entirely in the browser and does not require sign-up. References remain local until the user chooses to generate an image.

Key features

Reference-based prompt generation
Eight color measurements with hex codes and percentages
Contrast score calculation
Deterministic seeded layouts
Per-model prompt dialects
Board composition with role assignment
Local processing with optional export
Keyboard-first navigation

Use cases

Maintaining consistent visual style across multiple AI image generations
Translating visual references into precise prompts for designers
Streamlining prompt creation for non-technical users

Pros

Generates a single reusable prompt from multiple references
Preserves visual style across different image models
Measures real color values and contrast from references
Deterministic layouts reproducible with seed
Operates in-browser without sign-up

Cons

No free tier beyond basic functionality
Limited to 20 references per board
Requires manual reference upload
No API or integration options

Frequently asked questions about keyline

What does keyline actually do?

keyline analyzes a set of reference images and generates a single visual direction in the form of a detailed prompt with a [SUBJECT] slot. This prompt can be used with any image generation model to maintain the user's intended style.

Who is keyline for?

keyline is designed for users who want to preserve their visual taste across different image generation models without repeatedly rewriting prompts or re-uploading references.

How does keyline work?

Users drop up to 20 reference images into the browser-based interface. The tool composes them into a board, measures visual properties like palette and contrast, and compiles a prompt tailored for models like ChatGPT, Claude, or Midjourney.

Does keyline require sign-up or an account?

No, keyline operates entirely in the browser and does not require sign-up. Users can start using the tool immediately without providing any personal information.

Can I switch between different image generation models while keeping the same visual direction?

Yes, keyline compiles a single direction that can be reused across different models by simply changing the [SUBJECT] slot in the prompt.

What happens to my reference images after I use keyline?

Reference images remain local in the user's browser by default. They only leave the user's machine if the user chooses to generate an image using the compiled prompt.