Free prompt optimiser
Email Prompt Optimiser
Write clearer AI-drafted emails by giving the model your relationship to the recipient, the goal, tone and any details it needs to include.
Runs with Local Rules, free, in your browser — no sign-up needed.
What this optimiser checks
- Whether the recipient and relationship are named
- Whether the specific ask or goal of the email is explicit
- Whether dates, names or other necessary details are included
- Whether tone and length constraints are given
- Whether the output format (subject line included, plain text, length) is stated
Example prompt
Write an email to my manager asking for time off next week.
"Write an email to my manager asking for time off next week" doesn't say which days, why, or how formal the relationship is — so the model either asks nothing and invents details, or writes something so generic it needs a full rewrite anyway.
Local Rules rewrites the prompt to require the concrete facts an email actually needs (dates, reason if relevant, tone) and to state whether you want a subject line, a specific length, or a particular closing. Quick mode only patches the missing instruction; Professional and Expert add the fuller Role/Objective/Context structure for higher-stakes emails.
Frequently asked questions
- Will this send the email for me?
- No — it only improves the prompt you use to draft the email with an AI model. You still review, edit and send it yourself.
- Does it work for formal business emails as well as casual ones?
- Yes. State the relationship and desired tone in your prompt (for example "formal, to a client I haven't met") and the rewrite will carry that constraint into the Requirements section.
- What if I don't want to share personal details in the prompt?
- Use placeholders like [manager's name] or [dates] instead of real specifics — Local Rules checks for the presence of structure and detail, not for any particular personal information, and everything stays in your browser regardless.
Free — no sign-up needed. Bring your own key for direct AI analysis, or stay local.