HTML Editor

Full Control Over Your Signature HTML

For teams that want pixel-perfect control, the HTML Signature Editor gives you a full code editor with syntax highlighting, template variable insertion, and a real-time preview pane that shows exactly how your signature renders.

30+

Email clients tested

100%

HTML & CSS control

Live

Real-time preview rendering

HTML Editor Capabilities

Syntax-Highlighted Code Editor

Write and edit HTML with full syntax highlighting, auto-completion, and error detection in a professional-grade code editor.

Live Preview Pane

See your signature render in real time as you type. Toggle between desktop and mobile views to verify responsive behavior.

Template Variable Insertion

Insert dynamic variables like {{name}}, {{title}}, and {{phone}} that are replaced with real employee data at deployment time.

Cross-Client Testing

Preview how your signature looks in Gmail, Outlook, Apple Mail, and other popular clients before deploying to your team.

Using the HTML Signature Editor

Open the Code Editor

Switch to HTML mode from any template. Paste existing HTML or start from scratch with a clean boilerplate.

Write and Preview

Edit your HTML in the left pane while the right pane shows a live, rendered preview. Insert template variables from the sidebar.

Test and Deploy

Run the cross-client preview to check rendering across email clients, then deploy to your team with one click.

Editor Features at a Glance

Full HTML and inline CSS support

Template variable auto-completion

Desktop and mobile preview toggle

Cross-client rendering preview

Import and export raw HTML

Version history for every edit

"Our design team needed full HTML control, not just drag-and-drop. The Siggly code editor gave us exactly that, plus live preview so we could iterate without constant test emails."

Liam Novak

Front-End Lead, DigitalCraft Agency

Frequently Asked Questions

Can I paste HTML from an external editor?

Yes. Paste any valid HTML into the code editor. Siggly will validate it and highlight any issues that might affect email client rendering.

Does the editor support inline CSS?

Yes. Inline CSS is fully supported and recommended for email signatures. The editor can also inline CSS from style blocks automatically.

Are there HTML templates I can start from?

Siggly includes a library of starter HTML templates. You can also convert any drag-and-drop template to HTML for further customization.

Build Pixel-Perfect Signatures in HTML

Take full control of your email signature code with a professional editor, live preview, and cross-client testing.