AI Prompt Version Compare
A free, browser-based tool. Runs entirely in your browser — no sign up, nothing stored.
Prompt A
Prompt B
How to use this calculator
- Paste version A and version B.
- See which is stronger overall.
- Use the dimension table to see exactly where they differ.
How it works
Both prompts are scored by the same rule-based engine as the Prompt Score Calculator, then compared overall and across the five dimensions so you can see which change helped.
A higher score means the prompt includes more of the elements of a strong instruction — it's not a guarantee the answer will be better, so test both with your AI tool too.
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.
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.