AI Image Prompt Critique
A free, browser-based tool. Runs entirely in your browser — no sign up, nothing stored.
Your image prompt
Rule-based, runs in your browser — nothing is uploaded.
How to use this calculator
- Paste your image-generation prompt.
- Read the score and the Present / Add panels.
- Act on any warnings — especially asking for legible text in an image.
How it works
The tool checks your prompt for the descriptors image models respond to: a clear subject, the medium, a style, composition, lighting, mood/colour and extra detail, plus a negative/avoid list. The more it finds, the higher the score.
It also warns about common failure modes — too short, asking for readable text (models often garble it), or a conflicting medium. It's rule-based and never generates the image.
Worked example
A detailed fox prompt. “a red fox, digital painting, watercolour style, close-up, golden hour lighting, warm tones, highly detailed” covers every dimension and scores in the Excellent band.
Frequently asked questions
Does this use AI or send my prompt anywhere?
No. It runs entirely in your browser using rule-based checks — your prompt is never uploaded or sent to any AI model. Still, avoid pasting passwords, API keys or private data into any tool.
Why does it warn about text in images?
Most image models struggle to render legible words and frequently produce garbled text. If you need real text, add it afterwards in an editor.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.