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Free Tool

Email Signature Preview Tool

See how your email signature renders across Gmail, Outlook, Apple Mail, and more. Test desktop, tablet, and mobile views.

📧Gmail Preview

Gmail strips <style> tags and class attributes. Uses Arial by default.
Gmail
From: john@company.com
To: you@example.com
Re: Project update

Thanks for the update. Let me know if you need anything else.

Best regards,

Paste your signature HTML on the left to see a preview here

Cross-Client Compatibility Tips

Use table-based layouts

Tables are the most reliable way to structure email signatures across all clients, especially Outlook.

Inline all CSS styles

Gmail and many webmail clients strip <style> tags. Always use inline style attributes.

Stick to web-safe fonts

Arial, Helvetica, Georgia, and Verdana render consistently. Custom fonts will fall back to defaults.

Set explicit image dimensions

Always specify width and height on images to prevent layout shifts when images are blocked.

Keep width under 600px

Most email clients have a max content width around 600px. Stay within this for mobile compatibility.

Test dark mode

Gmail and Apple Mail auto-invert colors in dark mode. Test with light and dark backgrounds.

Signatures that look perfect everywhere

Siggly generates email-client optimized signatures automatically. No more testing and fixing rendering issues across Gmail, Outlook, and Apple Mail.