How to Add Email Signature in Gmail (2026)

George El-Hage 🔗 LinkedIn

Founder, Wave Connect | 1M+ digital business cards shared via Wave

I've helped thousands of professionals add digital business card links to their Gmail signatures. This guide covers desktop, mobile, HTML, and the one upgrade no other guide mentions.

Adding an email signature in Gmail takes about two minutes - but most people either skip it or set it up once and never think about it again. Both are missed opportunities.

In this guide, I'll walk you through the exact steps for Gmail on desktop, iPhone, and Android. I'll also cover how to add images, HTML signatures, multiple signatures, and a trick most guides leave out: adding a digital business card link so your contact info stays current automatically. I've deployed signatures with digital card links for hundreds of teams through Wave Connect, so this is based on real experience - not theory.

How to Add Email Signature in Gmail (Desktop)

Adding an email signature in Gmail on desktop takes five steps. The process is the same whether you use a personal Gmail account or Google Workspace. According to Statista, over 347 billion emails are sent every day - and roughly 80% of professionals include a signature. If you're not one of them, you're leaving free impressions on the table.

That's it. Five steps, under two minutes. Every email you compose from Gmail on desktop will now include your signature automatically. If you also use Outlook, here's our step-by-step Outlook signature guide.

How to Add Email Signature in Gmail Mobile App

Gmail mobile signatures are separate from your desktop signature - they don't sync. You need to set them up independently. The mobile signature is text-only, so keep it simple.

iPhone / iPad

Android

Important: Gmail mobile signatures are plain text only - no images, no formatting, no HTML. That's a Gmail limitation, not something you can work around. The best move for mobile? Include a short link to your digital business card so recipients can still access your full contact info with one tap.

How to Add an Image or Logo to Your Gmail Signature

Adding a logo or headshot to your Gmail signature makes it visually recognizable - but the wrong approach can break your formatting on the recipient's end.

Here's how to do it right:

1. In the signature editor, click the image icon in the formatting toolbar
2. Choose your method:
   • Upload: Select the "Upload" tab and drag or browse for your image file
   • URL: Select the "Web Address (URL)" tab and paste a hosted image link
3. Resize after insertion by clicking the image and choosing Small, Medium, or Large

[SCREENSHOT_7] - Gmail signature editor with image insertion dialog open

Best practices for signature images:

• Format: PNG for logos (transparent backgrounds), JPEG for headshots
• Size: Logo max 150x50px, headshot max 80x80px. Keep files under 100KB.
• Host externally: Upload your image to your website or a CDN, then use the URL method. Locally embedded images often get blocked by recipients' email clients.
• Alt text: Gmail doesn't have a built-in alt text field for signature images, but hosted images with descriptive filenames help.
• One image max: A logo OR a headshot - not both. Keep it clean.

Gmail does not support animated GIFs in signatures. If you need richer visuals for your signature design, a digital business card link gives recipients a full branded profile without cluttering the signature itself.

How to Add an HTML Signature to Gmail

Gmail's built-in editor is limited - if you want a more advanced design with tables, custom layouts, or specific styling, you'll need to create your signature in an external HTML editor and paste it in.

What Gmail keeps: Inline styles, tables, images, and hyperlinks all survive the paste.

What Gmail strips: JavaScript, external CSS, iframes, and anything that references an external stylesheet. If your design relies on classes or external CSS files, it won't work - use inline styles only.

Character limit: Gmail enforces a 10,000-character limit on signature HTML source code (not just visible text). If your design is complex, check the source character count before saving. When you hit this limit, the simplest fix is replacing multiple lines of contact info with a single digital business card link.

Always send yourself a test email after saving to make sure the formatting survived.

How to Add Your Digital Business Card to Your Gmail Signature

This is the one upgrade none of the other Gmail signature guides cover - and in my experience, it's the highest-ROI change you can make.

Instead of a static signature that goes stale every time you change jobs, phone numbers, or titles, add a link to your digital business card. Recipients click it and see your always-current contact info, social links, and company branding. No manual typing, no saving a vCard attachment - just one tap.

Here's why a digital business card in your email signature beats a traditional text block:

• Real-time updates - change your title or phone number once, and it reflects in every email you've ever sent. No re-editing signatures across devices.
• Click analytics - see who clicked your signature link, when, and from which email. Wave includes this free on every plan.
• Zero solicitation - Wave's free plan doesn't spam your contacts or add "Powered by" watermarks. Your recipients just see your info.
• Rich contact card - photo, social links, portfolio, booking page, company details. Way more than a text signature can hold.

How to Add It (3 Steps)

[SCREENSHOT_8] - Wave card link in Gmail signature example

That's it. Every email you send now includes a clickable link to your full, always-updated contact profile. For more ways to share your digital business card beyond email, I've written a separate guide.

Optional: Add a QR Code

Download your auto-generated QR code from the Wave dashboard and insert it as a small image in your Gmail signature (keep it around 80x80px). Recipients can scan it from their phone to save your contact instantly.

[SCREENSHOT_9] - Before/after: traditional Gmail signature vs Wave-linked signature

How to Create Multiple Signatures in Gmail

Gmail lets you create as many signatures as you need - for example, one formal signature for clients, one casual one for internal team emails, and one with a digital business card link for networking.

To create multiple signatures:

1. Go to Settings > See All Settings > General > Signature
2. Click "Create new" for each signature you want
3. Name them descriptively (e.g., "Client - Formal," "Team - Casual," "Networking - DBC Link")
4. Under Signature defaults, assign one as default for new emails and another for replies if you'd like

Switching between signatures: When composing an email, click the pen icon at the bottom of the compose window (next to the send button area) to pick a different signature for that specific message.

[SCREENSHOT_10] - Multiple signatures in compose window switcher

How to Change or Edit Your Gmail Signature

Editing your Gmail signature follows the same path as creating one: Settings > See All Settings > General > Signature. Click on the signature name, make your changes, and click "Save Changes" at the bottom of the page.

A few things to keep in mind:

• Changes only apply to new emails. Emails you've already sent keep the old signature.
• Desktop and mobile signatures are separate. Updating your desktop signature doesn't change your mobile one. You need to update each independently.
• Digital business card advantage: If your signature contains a Wave link instead of raw contact details, you can update your profile once and every email - past and future - points to the correct info automatically. No hunting through settings on three different apps.

Troubleshooting Common Gmail Signature Issues

If your Gmail signature isn't working the way you expect, you're not alone. These are the six problems I see most often, along with the fix for each.

1. Signature not showing on replies
Go to Settings > Signature defaults and make sure a signature is selected for "On reply/forward use" - not just "For new emails use." This is the #1 missed setting.

2. Image not displaying for recipients
Use the URL method (web-hosted images) instead of uploading directly. Some email clients block embedded images by default. Host your logo on your website or a CDN and link to the URL.

3. Formatting stripped or broken
Gmail strips external CSS and complex HTML. If you pasted an HTML signature, make sure it uses inline styles only. Avoid tables wider than 600px. Test by emailing yourself and a friend who uses Outlook.

4. Hitting the 10,000-character limit
Gmail's character limit applies to the HTML source code, not just visible text. If your signature design is complex, simplify it. The fastest fix: replace 5+ lines of contact info with a single digital business card link.

5. Signature looks different on mobile
Gmail mobile uses a completely separate plain-text signature. It doesn't pull from your desktop settings. Go to the Gmail app > Settings > your account > Mobile Signature to set it independently.

6. The "--" separator appearing above your signature
Gmail automatically inserts a -- divider above your signature. You cannot remove this in Gmail web - it's by design to separate the email body from the signature. Most recipients won't even notice it.