AI Image Prompt Critique
Get a critique of your AI image generation prompt with suggestions to improve clarity, style and detail, free and instant in your browser.
Your image prompt
Rule-based, runs in your browser — nothing is uploaded.
What each part of a great prompt means
This tool checks your prompt for these seven ingredients. Here’s what each one is — include as many as make sense for a stronger, more predictable image.
- Subject
- Who or what the image is of — the main focus. Start your prompt with it.e.g. “a red fox”, “an old lighthouse”, “a woman reading”
- Medium
- What kind of image it is. This sets the whole look before anything else.e.g. photograph, 3D render, oil painting, watercolour, sketch, cinematic still
- Style
- The artistic direction or aesthetic the image should follow.e.g. realistic, minimalist, anime, cyberpunk, vintage, isometric, flat
- Composition / shot
- How the scene is framed and the camera angle — where the ‘camera’ sits.e.g. close-up, wide shot, aerial / top-down, macro, centred, rule of thirds
- Lighting
- How the scene is lit. Lighting drives both mood and realism.e.g. golden hour, soft studio light, backlit, neon, moonlight, rim light
- Mood / colour
- The feeling and the colour palette you want to come through.e.g. warm, cool, pastel, vibrant, moody, dramatic, dreamy, monochrome
- Extra detail
- Finishing touches that sharpen the result and add polish.e.g. highly detailed, depth of field, bokeh, texture, reflections, fog, 4K/8K
All seven, in one prompt
“A red fox sitting in fresh snow (subject), photograph (medium), realistic style (style), wide low-angle shot (composition), soft golden-hour backlight (lighting), cool blue tones with a calm mood (mood / colour), highly detailed with a shallow depth of field, 4K (extra detail).”
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.
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Cite this tool
Zerdly. (2026). AI Image Prompt Critique. Retrieved from https://www.zerdly.com/tools/ai-image-prompt-critique/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.