Fonts
Stick to email-safe fonts — Arial, Helvetica, Georgia, Verdana, Tahoma — with a generic fallback. Custom web fonts rarely render in email clients, so they'll silently fall back anyway.
Color
Use your text in a near-black slate, secondary lines in a muted gray, and exactly one brand accent for the title line or divider. High contrast keeps it readable on light and dark backgrounds.
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Layout
A two-column layout (logo/photo + contact stack) with a thin vertical divider is the most reliable. Single-column stacks work well for mobile-first or minimal signatures.
Sizing
Name ~15–16px, title ~12px, contact ~11px, disclaimer ~9px. Consistent sizing creates the hierarchy that makes a signature scannable.
How KeyStamp helps
KeyStamp is an AI-powered email signature creator. Describe what you need and it generates a professional, email-safe signature you can refine visually — then manage branding, templates, and employee details from one place and export clean HTML that renders everywhere.
Frequently asked questions
Can I use my brand's custom font?
How many colors should a signature use?
Which layout is safest?
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