Email signatures from a single sentence.
Describe who you are and how the signature should look. Theo AI designs it, previews it in an inbox scene, and exports table-based HTML that pastes into Gmail, Outlook, and Apple Mail.
Powered by Theo AI
24 templates · 18 fonts · 11 scenes · No account
Five sentences, five signatures.
Each one below was designed from a single prompt. The signature in the window is the exact HTML you export.
Hi Alex,
Thanks for making time today. I've attached the proposal we talked through. If it looks right on your side, I can have the next steps lined up by Friday.
Best,
| ||
| Dana Whitfield | ||
| Managing Partner | ||
| Whitfield & Ross LLP | ||
| ||
Three steps. Under a minute.
- 01
Describe
Your name, your role and the look you want, in plain English. The model returns a template, a color pair, a font and a scene as structured JSON. It never invents image URLs.
- 02
Refine
Ask for changes in chat, or edit by hand. Template previews update live with your own details.
- 03
Export
Copy rich text, copy HTML, download a file or share a link. Tables and inline styles only, so Gmail, Outlook and Apple Mail render it the same way.
24 templates. 18 fonts. 11 scenes.
Everything runs in the browser except the AI call. No account, no database, no tracking.
Design by conversation
Ask for changes the way you would ask a designer. The model edits the template, colors and fonts, and can search for a GIF.
24 email-safe templates
Tables and inline styles only, so they render everywhere.
Animated GIF banners
Search GIPHY, or paste a URL. Results stay family-friendly.
11 inbox scenes
Pirate, noir, cosmic, and more. Scenes change the mock inbox, never your export.
Private by design
Your signature lives in your browser.
- Apache-2.0 licensed
- No account, no database
- Draft stays in your browser
- Dark-mode preview built in
Build on theo.
TheoVex is an AI research lab for highly regulated industries, healthcare and insurtech first. SignForge is a free project from the team. The code is Apache-2.0: read it, run it, change it.