How to Add an Email Signature in Gmail (Step-by-Step)

Gmail is the world’s most popular email service with over 1.8 billion users. Adding a professional email signature to your Gmail account takes just a few minutes and ensures every email you send makes a great impression. This step-by-step guide covers everything you need to know, from creating a signature to handling common issues.

Before You Start: Create Your Signature

You have two options for creating your Gmail signature:

Option A: Use Gmail’s built-in editor — Simple text formatting with basic options. Good for plain text signatures but limited for HTML designs.

Option B: Use a signature generator — Our free email signature generator creates professionally designed HTML signatures with templates, custom colors, social links, and avatar support. The generated HTML is optimized for Gmail compatibility.

We recommend Option B for the best results. Create your signature first, click “Copy HTML”, then follow the steps below.

Adding a Signature in Gmail (Desktop Web)

Step 1: Open Gmail Settings

1. Log into your Gmail account at mail.google.com
2. Look for the gear icon in the top-right corner of the screen, next to your profile picture
3. Click the gear icon to open Quick Settings
4. At the bottom of the Quick Settings panel, click “See all settings”

You will now see the full Gmail settings page. By default, you should be on the General tab.

Step 2: Find the Signature Section

Scroll down the General settings page. The Signature section is located about two-thirds of the way down, below “Vacation responder” and above “Personal level indicators”.

You will see one of two things:

• If you have never created a signature: a message saying “No signatures” with a ”+ Create new” button
• If you have existing signatures: a list of your current signatures

Step 3: Create a New Signature

1. Click ”+ Create new”
2. A dialog box will appear asking you to name your signature. Enter a descriptive name like “Work Signature”, “Personal”, or “Company Brand”
3. Click “Create”

Gmail will create a new signature slot with an empty text editor.

Step 4: Add Your Signature Content

Now you need to paste your signature into the editor:

If you used our generator:

1. Make sure you already clicked “Copy HTML” in the generator
2. Click inside the Gmail signature editor box
3. Press Ctrl+V (Windows) or Cmd+V (Mac) to paste
4. Gmail will automatically render the HTML as a formatted signature

If you are typing manually:

1. Click inside the editor box
2. Type your name, title, and contact information
3. Use the formatting toolbar above the editor to add bold, italic, links, and colors
4. You can insert an image using the image icon in the toolbar

Important note: Gmail’s signature editor has a size limit. If your signature includes a large base64 image, Gmail may trim it. Keep avatar images under 200KB for best results.

Step 5: Set Your Default Signature

Below the signature editor, you will see “Signature defaults” with two dropdowns:

1. FOR NEW EMAILS USE: Select your newly created signature from the dropdown. This means every time you compose a new email, this signature will automatically appear.

2. ON REPLY/FORWARD USE: Select the same signature (or choose a different one, or “No signature” if you do not want signatures on replies).

Step 6: Save Changes

This is the step most people forget. Scroll all the way to the bottom of the settings page and click the blue “Save Changes” button. If you navigate away without saving, your signature will be lost.

Step 7: Test Your Signature

Compose a new email to yourself. You should see your signature automatically inserted at the bottom of the compose window, below the ”— ” separator line.

Check that:

• All text is formatted correctly
• Links are clickable and point to the right URLs
• Your avatar/photo displays (if included)
• Social links work
• The overall layout looks clean

Adding a Signature on Gmail Mobile App

The Gmail mobile app (iOS and Android) has its own signature setting that is separate from the web version. Unfortunately, the mobile app only supports plain text signatures — no HTML, no images, no formatting.

On Android:

1. Open the Gmail app
2. Tap the hamburger menu (three horizontal lines) in the top-left
3. Scroll to the bottom and tap “Settings”
4. Tap your email address
5. Tap “Mobile Signature”
6. Type a simple text signature (2-3 lines recommended)
7. Tap “OK”

On iPhone/iPad:

1. Open the Gmail app
2. Tap the hamburger menu in the top-left
3. Tap “Settings”
4. Tap your email address
5. Tap “Signature Settings”
6. Toggle “Mobile Signature” on
7. Type your plain text signature
8. Tap “Done”

Mobile Signature Tips

Keep mobile signatures short. A good mobile signature is 2-3 lines:

John Doe | Product Designer
+1 (555) 123-4567
www.johndoe.com

Remember: your rich HTML signature from the web version will still appear when you send emails from the Gmail mobile app — the mobile signature setting adds an additional signature above it. To avoid duplication, you may want to set the mobile signature to blank if your web signature is already set up.

Multiple Signatures in Gmail

Gmail allows you to create multiple signatures and switch between them:

1. In Settings > Signature, click ”+ Create new” for each additional signature
2. Name them clearly (e.g., “Formal”, “Casual”, “Client-facing”)
3. Set your most-used signature as the default
4. When composing, click the pen icon at the bottom of the compose window to switch between signatures

This is useful if you have different roles, communicate with different audiences, or want a shorter signature for internal emails.

Google Workspace Signatures

If you use Gmail through Google Workspace (formerly G Suite) for your business, there are additional options:

Admin-Managed Signatures

Google Workspace admins can set organization-wide signature templates through the Admin Console (admin.google.com). Go to Apps > Google Workspace > Gmail > Compliance > Append footer. This appends a standardized footer to all outgoing emails from your organization.

Individual Customization

Even with an admin-managed footer, individual users can still set their own signatures through Gmail settings. The admin footer is appended in addition to the user’s personal signature.

Troubleshooting Common Gmail Signature Issues

Signature formatting looks wrong after pasting

Solution: Make sure you are pasting into the rich text editor, not a code view. Use Ctrl+V / Cmd+V directly. If the formatting is still wrong, try these steps:

1. Clear the signature editor
2. Open our generator in Chrome (Gmail works best in Chrome)
3. Copy the HTML again and paste

Images not showing

Possible causes:

• Image file is too large (keep under 200KB)
• Recipient’s email client is blocking images
• Base64 data URI exceeds Gmail’s size limit

Solutions:

• Compress your avatar image before uploading
• Use a smaller photo
• Host the image on a public URL instead of embedding it

Signature has extra spacing or line breaks

Solution: Gmail adds some default spacing. If your signature has too much whitespace, edit the HTML to reduce padding values. Our generator creates compact signatures, but Gmail may add extra space around tables.

The ”— ” separator line

Gmail automatically adds ”— ” (two dashes and a space followed by a newline) before your signature. This is an email convention called the “sig separator” that has been standard since the early days of email. You cannot remove it in Gmail. Most email clients recognize this separator and may hide signatures when quoting text.

Signature does not appear on replies

Check your Signature defaults in Settings. The “ON REPLY/FORWARD USE” dropdown must be set to your desired signature, not “No signature”.

Signature looks different to Outlook users

Outlook uses Microsoft Word’s rendering engine, which handles HTML differently than Gmail. Table-based layouts with inline styles (which our generator produces) are the most compatible format. Some minor differences in spacing and fonts are normal between clients.

Gmail Signature Size Limits

Gmail does not publish an official signature size limit, but based on testing:

• Text content: Up to about 10,000 characters
• Images: Base64-embedded images should be under 200KB each
• Total HTML size: Keep under 100KB for reliable delivery
• Links: No practical limit on the number of links

If your signature exceeds these limits, Gmail may silently trim it or cause rendering issues.

Best Practices Summary

1. Keep it concise — 3-5 lines of text plus an optional avatar
2. Use professional colors — Match your brand, avoid neon or overly bright colors
3. Test before deploying — Send a test email to yourself and to a non-Gmail account
4. Update regularly — Change your signature when your role, contact info, or branding changes
5. Set defaults for replies — Decide if you want signatures on replies and configure accordingly
6. Keep images small — Under 200KB per image, under 100KB total for the entire signature
7. Use a generator — Tools like our free email signature generator handle all the technical details

Ready to Create Your Gmail Signature?

Head to our free email signature generator, pick one of our 6 professional templates, fill in your details, and click “Copy HTML”. Then follow the steps above to paste it into Gmail. The entire process takes under two minutes.