How to Add a Signature in Gmail (Desktop & Mobile)
A Gmail signature is a block of text — or formatted content — that automatically appears at the bottom of every email you send. It typically includes your name, title, contact details, or even a logo. Setting one up takes only a few minutes, but the options available vary depending on how and where you access Gmail.
What a Gmail Signature Actually Does
When you compose or reply to an email in Gmail, your signature is inserted automatically into the message body. You can configure it to appear on new emails only, replies and forwards, or both. Gmail stores your signature in your account settings, meaning it syncs across devices — though the setup process differs between the web version and the mobile app.
Signatures support basic rich text: you can bold or italicize text, add hyperlinks, insert an image, and change font size or color. What Gmail's built-in signature editor doesn't support is complex HTML layouts or interactive elements — for those, users typically paste pre-built HTML directly into the editor or use a browser-based workaround.
How to Add a Signature in Gmail on Desktop
The desktop web interface (Gmail in a browser) gives you the most control over signature formatting.
Steps:
- Open Gmail and click the gear icon (⚙️) in the top-right corner
- Select "See all settings"
- Stay on the General tab and scroll down to the Signature section
- Click "Create new" and give your signature a name
- Use the text editor to build your signature — add text, links, or an image
- Under "Signature defaults", choose which signature appears on new emails and which appears on replies/forwards
- Scroll to the bottom and click "Save Changes"
The signature name is internal — it's only visible to you and helps if you create multiple signatures (more on that below).
Using Multiple Signatures
Gmail allows more than one saved signature per account. This is useful if you manage different roles from the same address — for example, a formal signature for client emails and a minimal one for internal messages. You can switch between signatures manually while composing by clicking the pen icon at the bottom of the compose window.
How to Add a Signature in Gmail on Mobile (iOS & Android)
The Gmail mobile app handles signatures differently from the web version. Mobile signatures are plain text only — no images, no HTML, no rich formatting.
Steps (iOS and Android are nearly identical):
- Open the Gmail app and tap the hamburger menu (three horizontal lines)
- Scroll down and tap Settings
- Select the account you want to configure
- Tap "Mobile Signature"
- Type your signature text and tap Save (or the checkmark)
One important distinction: the mobile signature is separate from the web signature. If you set up a formatted signature in Gmail's web settings, it won't appear when you send from the app — and vice versa. This catches many users off guard.
Factors That Affect How Your Signature Looks and Behaves
Even a correctly configured signature doesn't always display the way you expect. Several variables come into play:
| Factor | What It Affects |
|---|---|
| Email client on the recipient's end | Formatting, fonts, and images may render differently in Outlook, Apple Mail, or older clients |
| Plain text vs. HTML mode | If the recipient's client strips HTML, your formatted signature becomes plain text |
| Image hosting | Inline images may be blocked by corporate firewalls or spam filters |
| Mobile vs. desktop send | Two separate signature settings — changes to one don't affect the other |
| Google Workspace vs. free Gmail | Workspace accounts can have org-wide signatures enforced by an admin |
If you're using a Google Workspace (formerly G Suite) account through an employer or organization, your admin may control whether you can edit your signature, append disclaimers, or use certain formatting. Personal Gmail accounts have no such restrictions.
📎 Image Signatures: What to Know Before You Add a Logo
Many professionals want to include a company logo or headshot. Gmail supports this, but image delivery is inconsistent:
- Uploading directly to the signature editor embeds the image via Google's servers, which is generally reliable for other Gmail users
- Linking to an external image URL means the image only loads if the recipient allows remote content — many email clients block this by default
- Some recipients will see a broken image or a blank space instead
A common workaround for professional image signatures is using a signature management tool or generating an HTML signature template externally and pasting it in — though plain HTML pasted into Gmail's rich text editor can behave unpredictably.
When Signatures Don't Show Up
A few known scenarios where your Gmail signature may not appear as expected:
- Reply/forward default not set — double-check the "Signature defaults" section in Settings
- Composing in plain text mode — signatures revert to unformatted text
- Third-party email clients — if you're accessing Gmail through Outlook or Apple Mail via IMAP, those apps use their own signature settings, not Gmail's
- Multiple accounts in the Gmail app — each account has its own separate mobile signature
The Variables That Make This Personal
Once you understand the mechanics, the setup itself is straightforward. But what your ideal signature looks like — and how it behaves — depends on factors specific to you: whether you're on a personal account or Workspace, whether your recipients use the same email ecosystem, how often you reply from mobile versus desktop, and how much formatting actually survives to the other end.
Those variables don't change the steps, but they do change what a well-configured signature looks like in practice for your situation.