Email Signature Generator

A free, open-source tool for creating professional HTML email signatures. No sign-up, no server, no tracking — runs entirely in your browser.

Try it live →

Features

• Fully customizable — name, title, company, phone, email, website, address, logo, font, text size, accent colour, social links, buttons, and disclaimer
• Live preview — see changes instantly as you type
• Tidy, collapsible form — sections open one at a time so the preview stays in view
• 13 web-safe fonts and 4 text sizes — from Arial and Calibri to Georgia and Garamond, in Small, Medium, Large or Extra Large
• Address fields — street, city, postcode/zip and country, shown on a single line
• Light & dark mode preview — check how your signature looks in both email themes
• One-click copy — copy as rich text (paste directly into your email client) or raw HTML
• Conditional fields — blank fields are automatically hidden from the output
• Custom accent colour — match your brand with the built-in colour picker
• Adjustable logo size — slider to keep the logo compact, especially on mobile
• Social icons — LinkedIn, Twitter/X, Facebook, Instagram, GitHub, YouTube, TikTok, Pinterest and WhatsApp, plus two custom icons for any other network (only shown when a URL is provided)
• Call-to-action buttons — add up to three clickable buttons side by side, each with its own text, link and colour (or one colour for all)
• Customizable disclaimer — edit the text or toggle it off entirely
• Setup instructions — step-by-step guides for Outlook (new, classic, Mac), Gmail, and Apple Mail
• Zero dependencies — single HTML file, no build step, no frameworks
• Works offline — download and open locally, no internet required (except for Google Fonts and social icons)

How to Use

1. Open index.html in any modern browser (or visit the live version)
2. Fill in your details — leave any field blank to hide it from the signature
3. Pick an accent colour to match your brand
4. Click Copy signature and paste into your email client
5. Follow the setup instructions for your specific email app

Deploy Your Own

GitHub Pages (free)

1. Fork this repository
2. Go to Settings → Pages
3. Set source to Deploy from a branch → main / root
4. Your signature generator will be live at https://yourusername.github.io/email-signature-generator

Docker

docker run -d -p 8080:80 ghcr.io/clarkemedia/email-signature-generator:latest

Or with Docker Compose:

git clone https://github.com/clarkemedia/email-signature-generator.git
cd email-signature-generator
docker compose up -d

Then open http://localhost:8080 in your browser.

The image is published for linux/amd64, linux/arm64 and linux/arm/v7, so it also runs on Raspberry Pi and other ARM hosts.

Self-hosted

Just serve index.html from any web server or CDN. It's a single file with no build step.

Customizing the Defaults

The default field values in index.html showcase the creator's details as an example. To set your own defaults, edit the value="..." attributes on the form inputs near the top of the file.

Contributing

Contributions are welcome! Feel free to open an issue or submit a pull request. Some ideas:

• Additional email client instructions
• Image upload / base64 encoding for logos
• Colour theme presets
• Alternative signature layouts / templates
• i18n / localization

License

MIT — see LICENSE for details.

Credits

Created by Eoin McMahon at Clarke Media.

Social icons provided by Icons8.

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If this tool saved you time, consider buying me a coffee ☕