How to Add a Custom Social Media Card to Your Form

Availability: custom share cards are rolling out. Until then, a shared form link shows your site's default preview.

When somebody shares your waitlist link on X, LinkedIn, WhatsApp or Slack, those platforms show a preview card. A good card noticeably improves how many people click through, which matters a lot when your referrers are the ones doing the sharing.

Set your share card

1. Open your form in SmashSend.
2. Go to the Share tab.
3. Upload an image under Social card.
4. Set the card title and description. If you leave them blank, the form's own name and description are used.
5. Publish the form. The card is live immediately.

Image size

Use 1200 x 630 pixels. That is the size every major platform crops from, so anything else risks having your text cut off. Keep it under 1 MB, and use PNG or JPG.

• Put the important text in the middle. WhatsApp and some Slack previews crop to a square.
• Avoid small type. Most people see this card on a phone.
• Include your logo, so the card is recognisable in a busy feed.

What gets generated

SmashSend writes the standard Open Graph and Twitter card tags onto your hosted form page, which is what every platform reads:

<meta property="og:title" content="Join the waitlist" />
<meta property="og:description" content="Be first to get access." />
<meta property="og:image" content="https://smashsend.com/…/your-card.png" />
<meta property="og:url" content="https://smashsend.com/f/YOUR_FORM_KEY" />
<meta name="twitter:card" content="summary_large_image" />

If your card does not update

Platforms cache previews aggressively, so an old card can stick around after you change it. Force a refresh with the official debuggers:

• Facebook Sharing Debugger
• X Card Validator
• LinkedIn Post Inspector

Paste your form URL into any of them and re-scrape. A cache-busting query parameter on the image also works.

Have questions?

If you get stuck, email support@smashsend.com or contact us.