AI Email Reply Prompt Builder
A free, browser-based tool. Runs entirely in your browser — no sign up, nothing stored.
Email details
Your prompt
Copy-ready prompt
A template built from your inputs — paste it into your AI tool. Runs in your browser; nothing is uploaded.
How to use this calculator
- Paste the message you're replying to.
- Set the goal, tone, length and any key points to include.
- Copy the generated prompt into your AI tool to draft the reply.
How it works
The tool wraps the original message and your instructions (goal, tone, length, points, sign-off) into a clear drafting prompt, with a rule not to invent facts.
It builds the prompt, not the reply — the draft is written by whichever AI you paste it into. Always read before sending.
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.