Install guides
Add your signature to any email client
Gmail
Copy signaturePaste your signature into Gmail's settings on the web. It is then used on the web and, by default, in the Gmail apps.
Read the guideOutlook
Copy signatureSteps for new Outlook for Windows, Outlook on the web (Microsoft 365 and Outlook.com), classic Outlook for Windows and Outlook for Mac.
Read the guideApple Mail
Copy signatureAdd your signature in Mail on macOS. Mail on iPhone and iPad has its own simpler signature setting.
Read the guideYahoo Mail
Copy signatureTurn on the signature for your account in Yahoo Mail settings and paste the copied signature.
Read the guideThunderbird
Copy HTMLThunderbird accepts the raw HTML code, or a downloaded .html file.
Read the guide
Email client compatibility at a glance
SignaturesDB generates conservative HTML: nested tables, inline styles, web-safe fonts and hosted PNG images. That is the format every major client supports, but no two clients render email identically. These are the differences you are most likely to notice:
- Classic Outlook for Windows ignores rounded corners and may add extra line spacing. Initials avatars stay round because the shape is baked into the image.
- Images must be hosted on a public https:// URL. Some clients block remote images until the recipient allows them, so alt text is always included.
- Dark mode is handled differently by each client. Some invert colors, others leave them unchanged. Use the dark preview to check legibility, and prefer logos that work on both light and dark backgrounds.
- Mobile apps (Gmail, Yahoo, iOS Mail) often have a separate, simpler signature setting.