Email Signature Banner Maker
What this is: a free AI banner maker built for one job — the banner that sits inside your email signature. Enter your domain, and it pulls your logo and brand colours automatically; pick a goal (sale, event, booking link) and download a correctly-sized, email-safe banner in seconds. No account needed to try it. It pairs with the email signature generator, which places the banner under your signature in Gmail in one click.
Enter your domain — we pull your logo and colors. Pick a goal — we compose the banner. Download a PNG in standard email sizes.
Email signature banner examples
Sample signatures with a banner strip under the details — a campaign, a live event, a promo, a we're-hiring call. Each banner was made here and placed under a signature in the email signature generator; swap the artwork and the block stays the same.
Email banner sizes that actually work
| Use | Size | Why |
|---|---|---|
| Signature banner | 900×250 | The 3.6:1 slot the ProSignature editor crops banners to; exported at 2× it stays sharp on retina and scales down to the 600 px email width |
| Classic signature banner | 600×200 | Matches the standard 600 px email width at 1×; fine for older clients |
| Slim signature strip | 700×150 | Subtle, fits under long signatures |
| Newsletter header | 600×300 | Hero position at the top of a campaign |
| Promo card | 640×360 | In-body promotional block |
- Keep the file under ~100 KB — heavy images trigger clipping and slow loads.
- One message, one button. A banner with three CTAs is a banner with zero.
- Always link the image and set alt text — some clients block images by default.
- Don't make the whole email an image — spam filters and accessibility both suffer.
Frequently asked questions
What's the best size for a signature banner?
900×250 px — the 3.6:1 shape the ProSignature editor's banner block uses, so it drops in without cropping. It scales down to the standard 600 px email width and stays sharp on retina screens. 600×200 works too if you need the smallest file.
Does it really use my brand colors?
Yes — enter your domain, and your site's logo and dominant colors are fetched and extracted right in your browser. Override anything manually.
How do I put it in my signature?
Download the PNG and use the banner block in the ProSignature editor (with a link URL), or insert it in Gmail/Outlook signature settings.
Is anything uploaded?
No — fetching, composing and export run entirely in your browser. Attached photos never leave your device.
A banner is one email. A signature is every email.
Logo, photo, social links, banner block, one-click Gmail install — free to start.
Create my email signature →