AI Email Writer Free — Generate Emails Instantly

What is AI Email Writer?

AI Email Writer is a free AI-powered tool that uses the Claude AI model to generate high-quality results instantly. It handles the complex processing so you get professional output without needing any technical skills. Requires an Anthropic API key for AI-powered features.

This tool lets you write cold emails, follow-ups, complaints without installing any software or creating an account. Everything runs directly in your browser for maximum privacy. Your files and data never leave your device.

Use it for quick tasks at any time from any device — desktop, tablet or mobile. No subscription, no ads, no limits.

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Instant results

No server processing or wait

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100% private

Files stay on your device

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Always free

No subscription or fees

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Mobile ready

Works on any device

How to use AI Email Writer

Describe the email you need — who it is to, the purpose and tone
Select the formality level: professional, friendly or neutral
Click Generate — Claude writes a complete email with subject line and body
Edit as needed and copy the finished email

Why use OnlineToolsPlus?

AI tools on OnlineToolsPlus use the Claude API — one of the most capable AI models available. You bring your own API key, which means your text goes directly to Anthropic's servers (not through OnlineToolsPlus), and you pay only for what you use. This gives you full control over cost and privacy while accessing professional-grade AI writing assistance.

Frequently asked questions

What types of emails can it write?

Cold outreach, follow-ups, complaints, apologies, requests, professional introductions, declining requests, and most other professional email types are supported.

Does it need an API key?

Yes. A free Anthropic API key from console.anthropic.com is required.

How do I get the best results?

Provide specific details: who you are emailing, what you want them to do, the context of your relationship, and the desired tone. More detail produces more relevant, usable output.

Can I edit the output?

Yes. The generated email is a starting point. Edit it to match your voice and add personal details before sending.

Does it write in languages other than English?

Specify the desired language in your instructions. For example: \'Write this email in French.\'

Can it write emails for sensitive situations?

Yes, including difficult conversations like addressing conflicts, delivering bad news, or requesting overdue payments. Be specific about the situation and desired outcome for best results.

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Last updated: April 11, 2026

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