Last updated: March 2026
What Is the AI Email Writer?
The AI Email Writer is a free tool that generates professional email drafts from a simple description of what you need. Instead of spending 20 minutes crafting the perfect message, you describe the situation in plain language — "follow up on an invoice that's 30 days overdue" or "thank a colleague for covering your shift" — and receive three complete, ready-to-send drafts in seconds.
Each draft takes a different approach to the same situation, giving you options to choose from. One might be direct and efficient, another warm and relationship-focused, and a third balanced between the two. You pick the one that fits, personalize it with specific details, and send. The tool supports six tones, ten email types, and three length options to match any professional or personal context.
How to Write an Email with AI
Be specific about the situation. The more context you provide, the better the drafts. Instead of "email to boss," write "ask my manager for approval to attend a $2,000 conference in Austin next month." Details like amounts, timelines, and relationships give the AI the material it needs to write a convincing email.
Choose the right tone. Professional works for most workplace emails. Use Friendly for colleagues you know well, Formal for executives or legal contexts, Assertive for situations that need directness, and Apologetic when you need to take responsibility gracefully.
Set the recipient context. Telling the tool who you are writing to — "my direct manager," "a new client," or "the university admissions office" — helps it calibrate the level of formality and the type of language used.
Review and personalize. AI-generated drafts are polished starting points. Add the recipient's name, reference specific conversations or dates, and adjust any phrasing that does not sound like you. The best emails blend AI efficiency with your authentic voice.
Regenerate with different tones. If the first set of drafts does not hit the right note, use the tone quick-adjust buttons to instantly regenerate with a different tone. Sometimes a Friendly version of a difficult email lands better than an Assertive one.
When to Use an AI Email Writer
Difficult conversations: Asking for a raise, declining a request, delivering bad news, or addressing a conflict. AI helps you find the right words when emotions make writing harder.
High-volume email days: Sales follow-ups, customer responses, vendor communications. Generate a draft, personalize the key details, and send in a fraction of the usual time.
Non-native English speakers: Get grammatically perfect, idiomatically natural English emails that match professional norms. Choose the tone and let the AI handle the nuances of business English.
Overcoming writer's block: Sometimes you know what you want to say but cannot get started. Three different drafts give you momentum and ideas, even if you end up rewriting from scratch.
Frequently Asked Questions
How does the AI Email Writer work?
You describe the email you need in plain language, choose a tone, type, and length, then click Generate. The tool sends your description to Claude AI, which returns 3 distinct email drafts, each with a different approach. You can copy, edit, or download any draft.
Is my data private?
Your email description is sent to the Anthropic API for generation using your own API key. The content is processed per Anthropic's privacy policy and is not stored by this tool. Your API key is saved only in your browser's local storage and never sent to our servers.
Do I need an API key?
Yes. You need a free Anthropic API key from console.anthropic.com. The tool calls the Claude API directly from your browser using your key. This keeps the tool free and ensures your data stays between you and Anthropic.
What tones are available?
Six tones: Professional (balanced and business-appropriate), Friendly (warm but professional), Casual (relaxed and conversational), Formal (traditional and structured), Assertive (direct and confident), and Apologetic (empathetic and conciliatory). You can regenerate with a different tone instantly.
Can I use these emails as-is?
Yes. Each draft is a complete, ready-to-send email with a subject line. That said, personalizing the email with specific names, details, and your unique voice will always produce better results. Use the drafts as polished starting points.