Free Email Signature Generator
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Add your signature to Gmail
On a computer, after you click Copy signature:
- In Gmail, click Settings (the gear at the top right), then See all settings.
- On the General tab, scroll down to Signature. Click Create new, give the signature a name, and click Create.
- Click in the signature box and paste the signature with Ctrl+V (⌘+V on a Mac).
- Under Signature defaults, pick it for new emails, for replies and forwards, or both. Then click Save Changes at the bottom of the page.
To change it later, edit it in the same box (our guide to editing a Gmail signature has the details), or remove it from Gmail for good.
How the signature is built
The tool writes your signature as text, laid out in a small table, with the color, size and spacing set on each line. Gmail keeps that layout when you paste it into a message (see our test below). Because it stays text, people can copy your phone number, and your email address and website are links they can click. Only the picture comes from a link.
We pasted a signature from this tool into a new Gmail message in Chrome on October 14, 2026. Gmail kept the layout, the picture size, the round crop, the colors and the links. The only change: Gmail used its own default font instead of Arial.
Your photo or logo
This tool puts a link to your picture in the signature, not the picture itself. Gmail caps a signature at 10,000 characters, and a picture counts toward that limit. A picture stored inside the signature is written as text (base64), about 4 characters for every 3 bytes of the file. So a picture of only 7.5 KB would use about 10,000. With a link, each email loads the picture from its web address. The link must start with https:// and open for anyone, not only for you.
Gmail gives you three ways to add a signature picture: from a public web address, from a Google Drive image shared publicly, or by upload from your device. A Drive image only shows when its sharing is set to "Anyone with the link", and it disappears from your signature if you delete the file. Some work and school accounts can't share Drive images publicly until an administrator allows it.
No link? Leave the field empty, paste the signature into Gmail, then click where the picture should go, click Insert image in the box's toolbar, and choose Upload.
Google recommends a signature image 70 to 100 pixels high and 300 to 400 pixels wide. The largest it allows is 100 pixels high by 1,000 wide. This tool shows a photo at 80 by 80 pixels and a logo at 70 pixels high, so both fit Google's recommended height and stay under its maximum. If you upload a picture in Gmail and get an error, Google's advice is to resize the picture.
On your phone
The Gmail app on Android and iPhone has its own mobile signature, which you type as text in the app's settings. If you leave it empty, new emails you write in the app use the signature you made on your computer. So unless you want a shorter one for your phone, leave the mobile signature empty.
In Outlook or Apple Mail
You can paste the same signature in other email apps. In new Outlook and Outlook on the web, go to Settings, then Accounts, then Signatures. In Apple Mail on a Mac, go to Mail, then Settings, then Signatures. We built and tested this tool for Gmail, so check the result in those apps before you save.
Your signature in a mail merge
This is the part we know best. YAMM is a mail merge for Gmail: it sends one email to many people, each with their own name and details. The email is a regular Gmail draft, and YAMM sends every recipient a copy of it from your own Gmail account. So put your signature in that draft, and every recipient gets it. If Gmail adds your signature to new emails, a new draft already has it. If not, click Insert signature at the bottom of the draft, or paste it in.
YAMM doesn't add a signature of its own. And because placeholders like {{First name}} work anywhere in the draft's body, your signature can be personalized too, for example with a booking link for each client.
To send your first mail merge, install YAMM and follow our guide to mail merge in Gmail.
Questions about Gmail signatures
Can I have more than one signature in Gmail?
Yes. Create each one under Settings, See all settings, Signature, and pick a default for new emails and one for replies. While you write, click Insert signature at the bottom of the email to switch. If you send from other addresses with Send mail as, each address can have its own signature.
Why does my signature look wrong after I paste it?
Clear Gmail's Signature box and paste again. If it still looks wrong, Google suggests selecting the signature and clicking Remove formatting. If you can't format the signature and Plain Text shows above the signature box, turn off plain text mode: open a new email, click More options and uncheck Plain text mode. A signature image that's too large can also cause this.
Why does Gmail hide my signature behind three dots?
Gmail sometimes folds a signature away behind three dots. It's still part of the email. To see it, click Show trimmed content (the three dots) at the bottom of the message.