Contact Brain Lead on telegram for scripting and automation --Brain Lead
AI-Powered HTML Email Builder by Brain Lead
Build, edit, and transform professional HTML email letters with the help of AI — no coding required.
- Download the latest release
- Extract the folder anywhere on your PC
- Run LetterBuilder.exe
- The app opens in your default browser — that's it!
No installation needed. Fully portable — runs from a USB drive or any folder.
- WYSIWYG editor — see your email exactly as recipients will
- Bold, italic, underline, text color, font size
- Change box/section background colors with right-click
- Undo/redo support for all changes
- Full HTML source code editor with syntax highlighting
- Edit the raw HTML directly for precise control
- Changes sync live between visual and source editors
- Ask AI to modify your email in plain English
- "Change the button color to blue" — done instantly
- "Replace Hello with Hi" — surgical text edits
- "Make this email more professional" — full redesign
- Supports Groq, Claude, and ChatGPT — bring your own API key
- Upload a screenshot of any email you want to replicate
- AI reads the image and transforms your current template to match
- Swaps brand, colors, text, and buttons automatically
- Footer and structure preserved — only the content changes
- Import
.emlemail files directly - Export your finished email as
.emlready to send
- HTML obfuscation to protect your email source
- HTML sanitization to clean up messy code
- One-click buttons for common tasks: improve design, change colors, mobile-friendly, rewrite copy
- OS: Windows 10 or later
- Browser: Any modern browser (Chrome, Edge, Firefox)
- Internet: Required for AI features (API calls)
- API Key: At least one of: Groq (free), Claude, or OpenAI
Letter Builder works with multiple AI providers. You only need one:
| Provider | Best For | Free Tier |
|---|---|---|
| Groq | Fast edits, free usage | ✅ Yes |
| Claude | Smart edits, large emails | ❌ Paid |
| ChatGPT | General purpose | ❌ Paid |
- Click the ⚙️ Settings gear in the AI Chat panel
- Select your provider
- Paste your API key
- Click Save
- Start with HTML — paste your email HTML in the source editor, import an
.emlfile, or ask AI to build one from scratch - Edit visually — use the WYSIWYG editor to make changes, or type commands in the AI chat
- Transform — upload a screenshot of a target email and click Transform to match it
- Export — download as
.emlor copy the HTML
- Telegram: @brain_lead
Proprietary software by Brain Lead. All rights reserved.
Free trial available. Full license required for continued use.
Purchase: https://t.me/brain_lead