Turn an idea into an image prompt
CreativeUsing AI
Turn a one-line idea plus use, ratio and style into a prompt for image generation.
Fill the blanks and it copies as you filled it
Turn this into a prompt for image generation. - What I want, in one sentence: - Use and aspect ratio: - Style: - Must include:
0 of 4 blanks filled · anything left blank copies with its brackets
Image generation costs more energy than a text reply. Tightening the prompt first and generating fewer times saves more than anything else. To avoid the glossy 3D look, try adding "documentary photograph, 35mm film, natural light" to the style.
What this prompt does
Compared with asking the same thing without the length and format lines.estimate
Estimated output tokens
700
Asked loosely
180
This prompt
Energy (Wh)
1.215
Asked loosely
0.423
This prompt
Tokens estimated from characters; energy measured by Jegham et al. 2025.
What that saves
15.8 Wh · 5.54 gCO₂e · 74 mL — assuming 20 uses a day — the global average is 3.7 (Chatterji et al. 2025)
Tap a card for how the conversion was done.
Reported backfire — Specifying output lengthSpecifying a length longer than needed backfires (a 34% increase in 11% of scenarios)
Where these figures come from
Published figures for the rule itself — not what this prompt saves.
Specifying output length
38.7%mean reduction · 95% CI 29.7–47.7%
Podder et al. 2026 BP#5 · 18 use cases / 57 prompts
by modelGPT-4o 35%Command R+ 49%Mistral-7B 32%
Reduced in every scenario. No backfire reported