Free Email Signature Generator
Create a professional email signature in seconds. Fill in your details, choose a style, and copy the HTML to use in Gmail, Outlook, or any email client.
How to add your signature
- Click Copy signature above
- Open your email settings (Gmail, Outlook, Apple Mail)
- Find the signature section and paste
- Save your settings
Use Copy source code if you need the raw HTML.
How It Works
Three simple steps to your professional signature
Enter Your Details
Add your name, job title, company, email, and phone number. The preview updates as you type.
Choose Your Style
Pick from Minimal, Professional, Modern, or Compact layouts. Customize your brand color.
Copy & Paste
Click Copy HTML and paste it into your email settings. Works with Gmail, Outlook, and all major clients.
What makes a good email signature in 2026
1. Three to four lines, max
A professional signature should fit in 3-4 lines. Name + role, company, one contact method, optional second line (website or LinkedIn). Anything longer competes with your email content and adds visual weight to every reply thread.
2. One primary contact method
Multiple phone numbers, fax lines, and PO boxes are a relic of 1995. In 2026, your work email is the primary contact (it's the one they already have). Add a mobile number if you do client-facing work, and a LinkedIn URL if you want professional credibility. Skip the rest.
3. Dark mode compatibility
About 40% of Gmail users and the majority of Outlook users have dark mode enabled in 2026. Light-grey text on white looks great in light mode and disappears in dark mode. Use higher-contrast colors and avoid background colors entirely — most clients strip them.
4. Mobile-first
More than 60% of email is read on mobile. Long signatures with multi-column layouts collapse to a vertical stack on phones — which usually looks bad. Stick to a single-column layout for guaranteed mobile rendering.
5. Skip the marketing banner
Banner ads in email signatures (promoting your podcast, latest white paper, upcoming webinar) have terrible click-through and add visual noise. They also flag your emails as "promotional" in Gmail tabs. If you must promote something, a single italic line at the bottom works better.
6. Test before relying on it
Send a test email to yourself on Gmail, Outlook (web and desktop), and a mobile client. Email signatures are notoriously fragile — what renders cleanly in one client can break in another. The 30 seconds of testing saves embarrassment downstream.
How this compares to WiseStamp, HubSpot, and MySignature
Most signature generators trade email-signup friction for a few more template options. Here's the actual comparison.
| Tool | Free tier | Email required | Templates | Watermark on free |
|---|---|---|---|---|
| Aeralis (this tool) | Unlimited free | No | 4 styles | No |
| WiseStamp | Limited free | Yes | 30+ styles | Yes (on free) |
| HubSpot Generator | Free | Yes | 6 styles | No |
| MySignature | 7-day trial | Yes | 20+ styles | Yes (on free) |
Trade-off: if you want 30 template options and don't mind giving an email, WiseStamp wins on choice. If you want to generate HTML and be done, this tool is faster.
Need more than a free tool?
Like this signature generator? The Aeralis Gmail add-on does this and more, right inside your inbox.
Free tier includes 15 emails/month. No credit card required.
Frequently Asked Questions
Common questions about our email signature generator
Is this email signature generator really free?
Yes — 100% free with no limits, no signup, no email collected, no watermark on the output. Unlike WiseStamp and HubSpot, which require an email address for the free version, this tool generates the HTML in your browser without sending anything to us. Generate as many signatures as you need.
How do I add my signature to Gmail?
Click "Copy HTML", then in Gmail: Settings (gear icon) → See all settings → General tab → Signature section. Create a new signature, paste the HTML in the signature field, and save. New signature appears on all new emails automatically. For replies, check the "Insert signature before quoted text" option below.
How do I add my signature to Outlook?
In new Outlook (web or Windows): Settings → Mail → Compose and reply → Email signature. Paste the HTML and save. In desktop Outlook (Mac/Windows): File → Options → Mail → Signatures → New, then paste. Note that Outlook desktop sometimes strips background colors and certain images — test before relying on it.
Will my signature look the same across all email clients?
Our signatures use inline HTML and table-based layouts for maximum compatibility with Gmail (web and mobile), Outlook (all versions), Apple Mail, Yahoo Mail, and ProtonMail. The design avoids CSS that Outlook strips (background-image, position, flexbox). Always send a test email to yourself before using it externally.
Can I customize the colors?
Yes. Choose from 8 preset colors or use the color picker to enter your exact brand hex code. The primary color is applied to your name and links. Keep contrast in mind — light colors look great on white backgrounds but fail accessibility on dark-mode email clients (which now power ~40% of Gmail and Outlook users).
What information should I include in my email signature?
A professional signature should include: full name, job title, company name, and one primary contact method (work email or phone). Optional but useful: company website, LinkedIn URL, and a single social link. Skip: home address, multiple phone numbers, motivational quotes, animated GIFs, and large logos. Keep total height under 4 lines.
Should I include a photo in my email signature?
Mixed evidence. Pro: photos lift trust and recall in cold outreach and customer support. Con: many corporate clients block images by default, photos can fail on mobile, and signatures with photos are 2-3x larger in file size. Recommendation: include a small (under 100px wide) headshot only if you do client-facing work where recognition matters.
What is the ideal length for an email signature?
Three to four lines. Anything longer competes with your email content. The most common mistake is including everything — phone, fax, address, multiple social links, a quote, a banner ad. Each addition reduces the visibility of the rest. If you have legal compliance text required by your company, that goes in a separate paragraph below the main signature.
Do I need different signatures for replies and new emails?
Yes, ideally. New-email signatures can be slightly longer (4 lines). Reply signatures should be shorter (2 lines: name + role) because they appear after the original message and add visual weight to every back-and-forth. Both Gmail and Outlook let you set separate signatures for new emails vs replies.
How does this compare to WiseStamp, HubSpot, or MySignature?
WiseStamp and MySignature offer more features (analytics, banner ads, scheduled changes) but require an email signup for the free tier and pay-to-unlock the better designs. HubSpot has a free generator but pushes you toward their CRM signup. This tool is intentionally minimal: generate, copy HTML, done. No signup, no email, no upsell. The trade-off is fewer template options.
Want better email writing too? Read 5 Tips for Better Emails or try the Free AI Email Writer.
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