Free Tool

HTML Email Signature Converter

Convert any HTML signature into email-client compatible format. Removes unsupported code and optimizes for Gmail, Outlook, and more.

What This Tool Does

❌ Removes

  • JavaScript: Email clients block all scripts
  • External CSS: Style tags and linked stylesheets
  • CSS Classes: Most email clients strip them
  • Meta Tags: Not needed in email signatures
  • Unsupported HTML: DOCTYPE, html, head, body tags

Keeps & Optimizes

  • Inline Styles: Converts to inline CSS
  • Images: Adds proper email-safe attributes
  • Links: Preserves all hyperlinks
  • Tables: Email-safe layout structure
  • Text Content: All your signature text

How to Use

1

Paste HTML

Copy your existing HTML signature and paste it in the input box.

2

Convert

Click convert to optimize your HTML for email clients.

3

Copy or Download

Get your email-safe HTML ready to use.

4

Add to Email

Paste into Gmail, Outlook, or any email client.

Works With All Email Clients

Gmail
Outlook
Apple Mail
Yahoo Mail
Thunderbird
Outlook.com
ProtonMail
Zoho Mail

Need to manage signatures for your team?

Stop converting signatures one by one. Siggly automatically deploys email-safe signatures to your entire organization.