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Secret Lab

Free Email Signature Generator

Create a professional HTML email signature. Works with Gmail, Outlook, and Apple Mail. No signup needed.

✓ Free Secret Lab Gmail ready Outlook ready 3 layouts
Works with
Gmail
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Outlook
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Apple Mail
·
Any HTML client
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Ready to generate

Fill in your details and tap Generate

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Building signature...
Applying layout
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HTML — copy & paste into your email client
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Free Email Signature Generator — Gmail, Outlook & HTML Signatures

A professional email signature turns every message you send into a branding touchpoint. This free generator creates a fully-coded HTML email signature compatible with Gmail, Outlook, Apple Mail, and any HTML-capable client — no coding required. Fill in your details, pick a layout, and copy the code in under a minute.

Why Your Email Signature Matters

🏢
Professionalism
A polished signature signals credibility to every new contact.
🔗
More Clicks
Direct links to your website and social profiles from every email.
📱
Easy Contact
Phone and email one tap away on mobile.
🎨
Brand Consistency
Reinforces your brand colors in every communication.
🤝
First Impressions
Prospects judge your professionalism before they read your email.
📈
Lead Generation
Website link in every email is a passive source of new visits.

How to Add an HTML Email Signature — Gmail, Outlook & Apple Mail

Gmail Email Signature Setup

Go to Settings → See all settings → General → Signature → Create new. Click the source code button (<>) and paste the HTML. Save changes.

Outlook Email Signature Setup

Go to File → Options → Mail → Signatures. Create a new signature, then paste the HTML using the source editor. Set as default for new messages.

Apple Mail Signature Setup

Go to Mail → Settings → Signatures. Create a new signature, then drag the generated HTML file into the signature editor.

Frequently Asked Questions

Does the signature work in Gmail?

Yes. Copy the HTML and paste it into Gmail's signature editor using the source code view. Gmail preserves inline styles which is what this signature uses.

Does it work on mobile?

Yes. The signature is built with inline table-based HTML that renders correctly on both desktop and mobile email clients.

Can I use my own logo?

Upload a photo or headshot using the photo field. For a logo instead of a photo, upload your logo image — it will appear in the same position.

Is this tool free?

Yes — 100% free, no signup, no limits.

How do I add an HTML email signature to Gmail?

Generate your signature above, then in Gmail go to Settings → See all settings → General → Signature → New. Click the source code icon (<>) in the editor toolbar and paste the HTML. Save changes and your Gmail signature is live.

How do I add an HTML signature to Outlook?

In Outlook desktop go to File → Options → Mail → Signatures → New. Paste the HTML into the editor using the source view, set it as your default for new messages, and click OK. In Outlook on the web: Settings → View all Outlook settings → Mail → Compose and reply → Email signature.

What makes a good professional email signature?

A strong email signature includes your full name, job title, company, a direct email or phone number, your website, and one or two social links. Keep it to 4–5 lines maximum. Use your brand accent color for links and avoid large images that may not load in every client.

More Free Tools

Part of the Kroell Digital free tools hub. Also try the WhatsApp Link Generator to add a chat button to your emails.

Need a full brand identity or website? Get a free audit.

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