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How can I connect a multi-image field in Webflow using a third-party tool?

TL;DR
  • Webflow’s Multi-Image field is API read-only, so use multiple Single Image fields to upload images via tools like Zapier, Make, or CSV import.
  • Alternatively, use Airtable + Make to feed image URLs into Single Image fields or use Finsweet’s CMS Library to mimic multi-image displays with custom JavaScript.

To connect a multi-image field in Webflow CMS using a third-party tool, follow these steps to ensure the images are properly uploaded and linked within collection items.

1. Understand Webflow's Multi-Image Field Limitations

  • The Multi-Image Field in Webflow CMS supports up to 25 images per collection item.
  • It is currently read-only via the CMS API, meaning you cannot add or update multi-image fields through third-party tools like Zapier or Make (Integromat).
  • You can display them within your Webflow site but cannot programmatically insert images using external scripts or automation platforms.

2. Use the Single-Image Field as a Workaround

  • If you need to upload images via automation, use multiple Single Image fields instead of the Multi-Image Field.
  • Each Single Image field can be updated via the CMS API using tools like Make, Zapier, or Webflow’s native CSV Import.

3. Use Airtable + Make (Workaround Method)

  • If still wanting a workaround:
  • Store your images in Airtable as attachment fields with publicly accessible URLs.
  • In Make (Integromat), create a scenario that:
    • Fetches the image URLs from Airtable.
    • Uploads them to Webflow collection items using Single Image fields.

4. Use CMS Library by Finsweet (Advanced Option)

  • Finsweet’s CMS Library allows you to display external image arrays (e.g., from Airtable or JSON CMS) dynamically.
  • It uses custom JavaScript to filter and display content beyond Webflow’s native limits.
  • While it doesn't update the Multi-Image field, it mimics the behavior by rendering multiple images tied to a collection item dynamically on the frontend.

5. Monitor Webflow’s API Updates

  • Webflow has stated that full CMS API support for all field types, including Multi-Image fields, is in their roadmap.
  • Keep an eye on Webflow’s API documentation for announcements.

Summary

You currently cannot programmatically populate Multi-Image fields in Webflow via third-party tools due to API restrictions. Use multiple Single Image fields, external libraries like Finsweet’s CMS Library, or wait for a future API update to gain full access to Multi-Image capabilities.

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