Home › Best fonts for email signatures
Your signature renders on someone else's machine — so the font must already live there. The safe list, good pairings, and what to avoid.
The default for a reason: neutral, legible at 12-14px, installed everywhere. Helvetica reads slightly warmer on Apple devices.
Designed for screens — wide letterforms stay readable at small sizes. Great for contact-detail lines.
The safest serif. Adds gravitas for law, finance and consulting without Times New Roman's fax-machine energy.
Compact and crisp on Windows — pairs well with Outlook-heavy audiences.
A touch of personality while staying universally installed. Good for creative fields.
Webfonts load from a stylesheet — and Gmail, Outlook and most clients strip external stylesheets from signatures. Your carefully chosen brand font silently falls back to the recipient's default, often breaking the layout on the way. The professional move: use an email-safe font for the signature text, and put brand typography inside your logo image, which renders pixel-perfect everywhere.
13-15px, bold, brand color or near-black.
12-13px, regular, mid-grey — one visual step below the name.
11-12px. Below 11px mobile readers squint; above 13px it competes with the name.
One family, two weights beats two families. If you must pair: Georgia name + Arial details.
ProSignature's templates apply these rules automatically — and follow the rest of the best practices too.
Email clients do not reliably load web fonts. If you specify a typeface the recipient's machine does not have, the client falls back — often to Times New Roman — and the signature you designed is not the signature they read. This is not a rendering bug to work around; it is the baseline assumption to design against. The practical approach is a font stack: name your preference first, then progressively safer alternatives, ending with a generic family. Because the fallback is what a meaningful share of recipients will actually see, the stack should look deliberate at every step rather than only at the first.
Arial, Helvetica, sans-serif — the safest choice in email and the reason so many signatures use it. Unexciting, universally available.
-apple-system, 'Segoe UI', Roboto, Arial, sans-serif — renders as the recipient's native interface font, which reads as current on Mac, Windows and mobile alike.
Georgia, 'Times New Roman', serif — appropriate for law, finance and academia, where a serif signals convention rather than dated-ness.
Verdana, Geneva, sans-serif — wider letterforms stay legible at small sizes, useful for disclaimer text.
Script and handwriting faces, decorative display faces, and anything you have only seen on your own machine. They will not travel.
Rendering text as a picture to preserve a font means it disappears when images are blocked, cannot be copied, and looks soft on high-DPI screens.
Once you are inside the safe set, typography choices carry more of the effect than which family you picked. Keep body text around 13-15px; smaller looks cramped on mobile and larger crowds the message. Use weight rather than size for hierarchy — your name bold at the same size reads better than your name enlarged. Keep to two sizes in total plus a smaller one for any disclaimer. Use one accent colour, ideally taken from your brand, and keep body text near-black rather than mid-grey so it stays legible in dark mode and on poor screens. Line height around 1.4 prevents the block reading as a wall. The layout rules that surround this are in best practices.
Written and maintained by the ProSignature team. Competitor pricing and feature claims on this site are verified against each vendor's live page on the day of writing — last verified 26 July 2026. No affiliate links. How we work.
ProSignature writes clean, tested HTML straight into Gmail via Google's API — free.
Create my signature — freeOnly if it's an email-safe system font. Otherwise put brand typography in your logo image and use Arial/Georgia for the text.
11-14px: name at 13-15px bold, details at 11-12px. Never below 11px.
No — Gmail and Outlook strip the stylesheet link, and recipients see a fallback font instead.
Arial or Helvetica for modern fields; Georgia when you want a serif's formality (law, finance).