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Free Email Signature Generator
Create a professional email signature in minutes. Pick a layout, add your details and copy it straight into Gmail, Outlook or Apple Mail.
- Free, no account needed
- Nothing you type leaves your browser
- Email-safe HTML for every major app
1. Pick a layout
4. Add it to your email app
Works the same in the Atomic Mail web app and the desktop apps. Click Copy signature above first.
- 1
Open Settings
Click your profile picture in the top-right corner of Atomic Mail and choose Settings.
SearchAPLUSAAlex Morganalex.morgan@atomicmail.ioProfileSettingsSign out - 2
Go to Signature
Select Signature in the left menu, then click Create new.
GeneralAliasesSignatureSecuritySignatureAdd a signature to the end of your emails.
+ Create new - 3
Name it and paste
Give the signature a name, for example For work. Click into the Signature box and paste with ⌘V on Mac or CtrlV on Windows.
Add signatureFor workAM⌘ VAlex MorganHead of PartnershipsNORTHWIND STUDIO - 4
Make it your default
Turn on Use this signature as default. To use it for one address only, pick it under Assign to alias.
Use this signature as defaultalex.morgan@atomicmail.ioalex.morgan@atomicmail.iowork@atomicmail.io - 5
Save changes
Choose whether the short Atomic Mail signature appears after yours, then click Save changes. Your signature is added to every new email.
Show Atomic Mail signatureAdds “Sent with Atomic Mail” after your signature.
CancelSave changes
No Atomic Mail account yet? Create a free private email address in under a minute.
- Click Copy signature above.
- In Gmail on the web, open Settings (gear icon) and choose See all settings.
- On the General tab, scroll to Signature and click Create new.
- Name it, click into the editor box and paste with CtrlV (⌘V on Mac).
- Choose it under Signature defaults, then click Save Changes at the bottom of the page.
Gmail rejects signatures longer than 10,000 characters. The meter under the preview shows where you are.
New Outlook and Outlook on the web
- Click Copy signature above.
- Open Settings → Account → Signatures.
- Create a new signature, paste it into the editor and click Save.
- Pick it as the default for new messages and replies.
Classic Outlook for Windows
- Go to File → Options → Mail → Signatures.
- Click New, name it and paste into the edit box. Click OK.
Classic Outlook draws rounded corners and round photos as squares. Everything else keeps its layout.
- Click Copy signature above.
- In Mail on your Mac, choose Mail → Settings (or Preferences) and open Signatures.
- Select your account, click + and name the signature.
- Untick Always match my default message font, then paste into the preview box.
Mail may show images as placeholders while you edit. They appear normally for recipients once the email is sent.
Professional email signature templates
Every layout is built from tables with inline styles, the way email apps expect. Pick the one that fits how you write and who you write to.
Minimal
Name, title and contact details as clean text. Nothing for image blocking to hide, so it looks the same in every inbox.
Consultants, legal, financeModern
Your photo or logo beside your details, separated by an accent line. Shows your initials when you don’t add an image.
Sales, partnerships, foundersCorporate
Labeled phone, email and web rows under a colored rule, with your logo on the right. Easy to roll out across a team.
Companies and teamsCompact
Everything on two lines. Use it for replies and forwards, where a full signature in every message clutters the thread.
Replies and busy threadsBrand-forward
Your name in a bold header in your brand color, with contact details and an optional button below.
Freelancers, studios, brandsAI agent disclosure
Works with any layout. Adds a line telling recipients the mailbox is run by an AI assistant, on whose behalf, and how to reach a person.
Teams running email agentsHow to create an email signature
Three steps, about two minutes. You don’t need an account and you can come back to edit it later.
- 01
Pick a layout
Choose one of five layouts. The previews update with your own details as you type, so you can compare them side by side.
- 02
Add your details
Fill in only what you want to show. Empty fields are left out. For a logo or photo, paste a link to an image that’s already online.
- 03
Copy it into your email app
Click Copy signature and paste it into your signature settings. Use Copy HTML for apps and tools that take signature code.
What to include in an email signature
A good signature answers who you are and how to reach you. Everything else competes for attention.
Include
- Full name and job title, so people know who they’re dealing with.
- Company name and, for larger teams, your department.
- One phone number that you actually answer.
- Your website, shortened to the bare domain.
- One to three social profiles you keep up to date.
- A logo or photo, hosted online and kept small.
Leave out
- Quotes and slogans. They age badly and repeat in every reply.
- Every social network you’ve joined. Pick the ones that matter for work.
- Large banners and animated GIFs. They often get blocked or clipped.
- Several phone numbers and addresses. One of each is enough.
- Images of text. Recipients who block images see nothing.
- Very long legal notices. Gmail rejects signatures over 10,000 characters.
Email signature design best practices
Email apps render HTML differently from browsers. These habits keep your signature right everywhere.
Use email-safe fonts
Most email apps swap web fonts for defaults. Arial, Helvetica, Verdana and Georgia render as intended.
Stick to one accent color
Use your brand color for one or two details, like a line or your company name. Keep body text dark gray.
Host small PNG or JPG images
Link a logo under 100 KB from your site. SVG fails in Gmail and Outlook, WebP in classic Outlook.
Check it on a dark background
In dark mode, transparent logos can vanish. Check the Dark preview before you copy.
Keep it short
Five or six lines is enough. A short signature is easier to scan and stays under Gmail’s limit.
Make it work without images
Some recipients block images. Keep your name and details in text so the signature still reads.
Frequently asked questions
Is this email signature generator free?
Yes. All five layouts, copying and the HTML download are free. You don’t need an account, and your signature carries no Atomic Mail branding unless you choose to add the optional “Made with Atomic Mail” link.
Do you store the details I enter?
No. The generator runs entirely in your browser and doesn’t send what you type to our servers. If you add an image link, email apps load that image from wherever it’s hosted.
Why can’t I upload my logo directly?
People who receive your email need to load the image from the internet. A file on your computer can’t be seen by them. Upload your logo to your website or another public host, then paste its https:// link.
Will my signature work in Outlook?
Yes. The signatures are built from tables with inline styles, which Outlook supports. Classic Outlook for Windows shows rounded corners and round photos as squares. The layout and colors stay the same.
Why does Gmail say my signature is too long?
Gmail accepts signatures up to 10,000 characters of HTML. The meter under the preview shows how close you are. Remove a few social profiles or shorten your disclaimer to bring it down.
Can I edit my signature later?
Yes. Click Save settings file before you leave. Next time, click Open settings file and pick that file to continue where you left off.
What is the AI agent option?
If an AI assistant reads and answers email for you, the option adds a short line saying so, naming who it works for and, optionally, an address where people can reach a person. If you’re building email agents, see Atomic Mail for Agents.
Can I use the signature on my phone?
You can build it on your phone, but set it up on a computer where you can. The Gmail mobile app only supports a plain-text signature in its own settings.
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