Customize the sharing of a form

When you share a url on social media, the sharing tool reads your page to create the link that will be displayed. This link contains a title, a description and an image. Our subscription forms have default settings, but you can customize all of these if you wish.

Before starting

  • This option is only available for hosted forms.
    If you are currently using an iframe form and it’s difficult for you to customize these elements on your website, it could be easier to duplicate your form and turn its copy into a hosted form that you can share separately. This way, you can also know the origin of your subscribers: Facebook or your site?
  • To customize the image in your form’s preview and achieve the best possible result, follow these recommendations:

    Recommended formats: PNG (8 or 24) or JPG (RBG)
    Maximum file size: 5MB
    Suggested size: 1200 x 630 pixels
    Important: Position the most important elements in the center of your image. Note that depending on where and how the form is published, your image may be resized or cropped.

How to customize the sharing of a hosted form

  1. Go into your account and edit your form. Learn how >
  2. Open the Share on social networks tab at the top left of the editor.
  3. Enter a title for your form. Ideally, keep it short. If it’s too long, it may be truncated. We recommend 40 to 60 characters. 

    e.g.: Subscribe to our newsletters, Let's keep in touch, Join our VIP club, etc.
  4. Enter a description (maximum length: 100 to 300 characters).

    e.g.: Don’t miss any important information. Subscribe now and receive exclusive content every month, directly in your inbox.
  5. Change, if need be, the default image to a custom image. To do so, click the Choose an image button. 

    Read our recommendations here >
  6. Test your form's preview before sharing it.

Test your form’s preview in your post

Before testing the form's preview in your social media post, you will first need to get your form’s link. Learn how >


  1. Copy the URL of your form.
  2. Log into your Facebook account and go to the following link:
  3. In the Sharing Debugger tab, paste your form’s link in the empty field.
  4. Click the Debug button. If your link has never been shared on Facebook before, you may need to click the Fetch new information button.
  5. Scroll down the search results to the Preview section and check your form's preview as it would appear in your post. If the form’s preview doesn’t reflect your latest changes, click the Scrape again button to refresh.


  1. Copy the URL of your form.
  2. Log into your Twitter account and go to the following link:
  3. In the Card URL section, paste your form’s URL into the available field.
  4. Press the Preview card button.
  5. In the Card preview section, check how your form’s preview will look in your post.


  1. Copy the URL of your form.
  2. Make sure you’re logged into your Linkedin account and go to the following link:
  3. Paste your form’s link in the empty field and click the Inspect button.
  4. Check how your form’s preview will look in your post.