Business Letters
Writes formal business letters.
AI Prompt Generator
Craft an optimized prompt for any LLM in seconds.
PDF, Word, Excel, CSV, text, Markdown, JSON, XML, HTML & code — up to 5 files, 10 MB each. Files are analyzed and never stored or shared.
Great all-rounder for writing, code and analysis.
What this tool does
Writes formal business letters.
When to use it
You need a correctly formatted letter.
Prompt template
Write a formal business letter to [recipient] about [purpose] in a [tone] tone. Include proper letter formatting.
Example
A price-increase notice to a client.
Common mistakes to avoid
- Wrong formality level
- Missing context
Best practices
- State the relationship
- Specify the desired outcome
Frequently asked questions
Do I need Microsoft Copilot to use this Word tool?
No. You can generate the prompt here and paste it into ChatGPT, Claude, Gemini or Copilot. Copilot adds live access to your Word file, which is convenient but optional.
Will the AI change my original file?
No. FormelyAI only generates text prompts. You copy the result and apply it yourself, so you stay in control of your documents.