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Fix Webflow → HubSpot Sync Issues (Not Working, Errors, Duplicates)

🔧 2 Common Issues

Diagnose and resolve common sync problems. We've documented the 2 most common issues, their root causes, and exactly how to fix them. See step-by-step fixes for duplicates, missing fields, rate limit errors, and connection issues.

high High Frequency

Multi-select checkboxes sync as 'true' or comma-list, breaking HubSpot picklist.

Also searched as: "Webflow HubSpot multi-select checkboxes sync as 'true' or comma-list, breaking hubspot picklist."

#1 Delimiter Mismatch 100% likely

📋 How to Diagnose

  1. 1. Webflow sends: 'A, B, C'
  2. 2. HubSpot expects: 'A;B;C'

✓ Solution

Use Make to transform the delimiter before pushing to HubSpot.

⏱️ Est. time: 20 min

Use Make → →
View Setup Guide
medium High Frequency

Form submits success, but contact property is empty in HubSpot.

Also searched as: "Webflow HubSpot form submits success, but contact property is empty in hubspot."

#1 Webflow Field Name ≠ HubSpot Internal Name 100% likely

📋 How to Diagnose

  1. 1. Webflow Field Name: 'Work Email'
  2. 2. HubSpot Property: 'email'
  3. 3. Sync relies on exact name match or strict manual mapping.

✓ Solution

Rename Webflow field ID to match HubSpot property internal name.

⏱️ Est. time: 5 min

View Setup Guide

Step 1: Try the Official Integration

Direct connection

Start with the native integration if available. It's usually the most reliable, but may have limitations.

View Setup Guide

Free with your subscription

Step 2: Use Make for Custom Flows

No code automation

Create custom integration workflows with Make's visual designer. It works with almost any API.

Try Make Free →

1000 ops/mo free. No credit card.

Step 3: Self-Hosted with n8n

Full data control

Need complete data privacy? n8n is open-source and self-hostable. Build custom integrations with full control over your data.

Try n8n Free →

Open source. Self-host or cloud. Unlimited ops.

Step 4: Add Human Review

Approval automation

Relay adds human-in-the-loop approvals, Slack/Teams alerts, and conditional logic to your automation.

Try Relay Free →

1000 actions/mo free. No credit card.