How to Add a Signature in Gmail (Desktop & Mobile)

A Gmail signature is a block of text — and optionally images or links — that automatically appears at the bottom of every email you send. It can include your name, job title, contact information, a logo, or even a legal disclaimer. Setting one up takes only a few minutes, but the options vary depending on whether you're using Gmail in a browser or on a mobile device.

What a Gmail Signature Actually Does

When you compose or reply to an email, Gmail can automatically insert your signature at the bottom of the message body. You can create multiple signatures and assign different ones to different situations — for example, a full professional signature for new emails and a shorter one for replies and forwards.

Signatures in Gmail are stored on a per-account basis, meaning if you manage multiple email addresses inside Gmail, each one can have its own distinct signature. They're also synced to your Google account, so changes made on desktop carry over to the Gmail web interface on any other computer you log into.

One important distinction: Gmail's mobile apps and the desktop web version manage signatures somewhat independently. What you configure in Gmail settings on a browser doesn't automatically populate in the iOS or Android app's signature settings — those are configured separately.

How to Add a Signature in Gmail on Desktop 🖥️

1. Open Gmail in your browser and click the gear icon (Settings) in the top-right corner.
2. Click "See all settings" to open the full settings panel.
3. Stay on the General tab and scroll down to the Signature section.
4. Click "Create new", give your signature a name (this is just a label for your own reference), and click Create.
5. Use the text editor to build your signature. You can format text with bold, italics, font size, and color. You can also insert links and images using the toolbar icons.
6. Under Signature defaults, choose which signature appears on new emails and which appears on replies/forwards. These can be different signatures or the same one.
7. Scroll to the bottom and click Save Changes.

That's the complete flow for the web version. Your signature will now automatically appear when you compose a new message. You can also manually change the signature within any compose window by clicking the pen icon at the bottom of the compose toolbar.

How to Add a Signature in Gmail on Mobile 📱

The Gmail mobile app — both Android and iOS — has its own signature setting, and it's more limited than the desktop version.

For Android:

1. Open the Gmail app and tap the three-line menu (hamburger icon) in the top-left.
2. Scroll down and tap Settings.
3. Select the email account you want to configure.
4. Tap Mobile Signature.
5. Type your signature text and tap OK.

For iOS:

1. Open the Gmail app and tap your profile picture in the top-right corner.
2. Tap Manage your Google Account — or go directly to the app's Settings via the hamburger menu.
3. Select your account, then tap Signature settings.
4. Toggle on Mobile Signature and enter your text.

The mobile signature editor is plain text only — no formatting, images, or HTML. If you need a rich signature with logos or styled text, that functionality lives exclusively in the desktop web version.

Key Variables That Affect Your Setup

How your signature looks and behaves depends on several factors worth thinking through:

Images in desktop Gmail signatures work best when hosted externally or inserted directly via the image upload tool in the signature editor. Images that are simply pasted in may not render for all recipients depending on their email client's settings.

HTML signatures — the kind with custom layouts, branded colors, or multiple columns — aren't editable directly in Gmail's built-in signature editor as raw code. Many professionals use third-party signature generators to create the HTML, then paste the rendered output into Gmail's editor.

The Spectrum of Signature Needs

Someone setting up a personal Gmail account might only need a single line with their name — that's a 30-second task in mobile settings. A freelancer or small business owner might want a signature with a logo, phone number, website link, and consistent formatting across devices, which requires more careful setup on desktop and some thought about image hosting. A business using Google Workspace (formerly G Suite) has additional options, including organization-wide signature enforcement managed at the admin level — something individual users don't control.

If you're managing email on behalf of a company or team, whether your personal signature settings even apply may depend on policies your Workspace administrator has configured. Admin-set signatures can override or append to individual ones, which is a layer most personal Gmail users never encounter.

The right approach also shifts based on how often you switch between devices. If you primarily reply to emails from your phone, the mobile signature setting matters most — and you'll want to keep it concise since plain text is your only option there. If you send most emails from a browser, the desktop signature editor gives you meaningful formatting control and the flexibility of multiple named signatures.

Your signature setup ultimately comes down to what you're trying to communicate, which devices you actually use, and how polished or functional you need the result to be.