How can I add an image or multiple images field in Webflow or with 3rd party support for a marketplace platform where sellers can upload profile pictures and images of previous work?

To enable image uploads for seller profiles and portfolios in a Webflow marketplace platform, Webflow CMS alone won't support user-uploaded images directly from the front end. You'll need to integrate with a third-party tool like Zapier, Make (Integromat), or Memberstack along with upload widgets or custom form handling.

1. Use Webflow CMS for Data Structure

• Create two CMS Collections:
• Sellers: For profile information like name, bio, and profile picture (image field).
• Portfolio Items: For previous work images, linked via a Reference or Multi-Reference field to the associated Seller.
• Make sure each CMS collection has a dedicated Image field for storing a picture.

2. Create a Seller Dashboard with Memberstack (or Webflow Memberships)

• Use Memberstack or Webflow Memberships to manage user authentication.
• Once logged in, each seller can access a Dashboard page filtered to their own data using Webflow CMS filters and Webflow logic or Memberstack attributes.

3. Add Image Upload Fields Using Uploadcare or FileStack

• Embed a third-party file upload widget like:
• Uploadcare (recommended): Provides an upload button, image preview, and returns a public image URL.
• FileStack: Similar functionality with image transformations and security options.
• Once the seller uploads an image, capture the image URL using a Webflow Form with hidden fields or via JavaScript.

4. Use Zapier or Make to Send Form Data to Webflow CMS

• When a seller submits a form (with the image URL and other fields), use Zapier or Make (Integromat) to:
• Create or update a CMS item in the Sellers or Portfolio Items collection.
• Make sure the image URL is correctly inserted into the CMS image field (Webflow supports image URLs from external sources).
• You'll need:
• A Webflow API token from Project Settings > Integrations.
• Form submission trigger in Zapier/Make.
• Webflow CMS "Create Item" or "Update Item" action.

5. Optional: Store Uploaded Images to Cloud and Use CDN

• Uploadcare and Filestack host images on CDNs by default.
• If needed, connect these services to Cloudinary or Amazon S3 for additional control.

Summary

To add image upload functionality in Webflow for sellers' profiles and portfolios, use Webflow CMS for structure, Memberstack for authentication, Uploadcare or Filestack for image uploading, and Zapier or Make to connect uploaded image URLs to the CMS. This setup lets sellers manage both profile pictures and portfolio images dynamically.