# Build a web form with an AI backend, no code > Most website forms just land in an inbox and wait. This one does the work. You describe the form in Lovable, and it builds it. Source: https://learn.ynteractive.com/content/visual/lovable-n8n-form · Updated 2026-10-11 · Free from Stepthrough (https://learn.ynteractive.com) [Step-by-step guide](https://learn.ynteractive.com/content/visual#format-steps-carousel) · 7 slides · [Lovable](https://learn.ynteractive.com/content/tool/lovable) · [n8n](https://learn.ynteractive.com/content/tool/n8n) By [Robert Breen](https://learn.ynteractive.com/content/about) · Published October 11, 2026 · From the free lesson [Lovable + n8n: Build a Web App with an AI Backend](https://learn.ynteractive.com/content/lovable-n8n-web-app-ai-backend) Most website forms just land in an inbox and wait. This one does the work. You describe the form in Lovable, and it builds it. Swipe or scroll sideways for all 7 slides. The whole guide is written out below. ## The guide in text Lovable builds the form. n8n saves the lead and writes the reply. ## Step by step 1. ### Describe the form in Lovable Name, Email, Question and Feedback, a heading that reads Have a Question?, and a button that says Sending... while it works. 2. ### Catch it with an n8n Webhook Store the webhook URL as a Lovable secret named `N8N_WEBHOOK_URL`, not in the page code. It stays out of the source and you can swap it later. 3. ### Let the AI agent do the work It adds the lead to a Leads sheet and replies to the person through Gmail. Sheet columns match the form fields, so no manual mapping. 4. ### Only show success when it's done Set the webhook to wait for **Respond to Webhook**. The visitor sees success after the agent has finished, not before. 5. ### Submit it and check the sheet Publish the workflow first, since the production URL only works once it's published. Then fill in the form and watch the row appear. Businesses and people in the examples are made up. The steps, screens and wording come from the free lesson and the Stepthrough glossary and prompt library. ## Do it yourself, free **Lovable + n8n: Build a Web App with an AI Backend**. Build a contact form in Lovable and connect it to an n8n workflow — webhook trigger, AI Agent, Google Sheets, Gmail, and a Respond node that ties it all together. You do every step yourself in a practice copy of Lovable and n8n, it checks your work as you go, and “Do it for me” finishes any step you get stuck on. Free, and nothing touches your real accounts. [Start the free lesson](https://learn.ynteractive.com/modules/lovable-n8n) [Or read the full step-by-step guide](https://learn.ynteractive.com/content/lovable-n8n-web-app-ai-backend) ## Related terms Plain-English definitions, each with an example from a free lesson. [Deployment (publishing a web app)](https://learn.ynteractive.com/content/glossary/web-app-deployment) · [No-code (and low-code)](https://learn.ynteractive.com/content/glossary/no-code) · [Request body (payload)](https://learn.ynteractive.com/content/glossary/request-body) · [Vibe coding](https://learn.ynteractive.com/content/glossary/vibe-coding) · [Webhook](https://learn.ynteractive.com/content/glossary/webhook) · [Artifacts (Claude)](https://learn.ynteractive.com/content/glossary/claude-artifacts) · [HTTP Request node](https://learn.ynteractive.com/content/glossary/http-request-node) · [Prompt injection](https://learn.ynteractive.com/content/glossary/prompt-injection) [The full AI glossary](https://learn.ynteractive.com/content/glossary) ## Related prompts - [Lovable web form prompt](https://learn.ynteractive.com/content/prompts/web-form-builder-prompt): Write a Lovable prompt for a web form that posts to n8n: fields, validation, button states, a thank-you message, and a webhook… - [A/B test plan prompt](https://learn.ynteractive.com/content/prompts/ab-test-plan-prompt): Plan one clean A/B test for an email, form or page: a single change, a stated guess, the number that decides the winner and when… - [AI agent system message prompt](https://learn.ynteractive.com/content/prompts/agent-system-message-draft-prompt): Draft the system message for an n8n AI Agent: who it is, what it knows, its rules and how it writes, including a rule never to… - [AI agent test messages prompt](https://learn.ynteractive.com/content/prompts/agent-test-messages-prompt): Test an AI agent before launch with realistic messages: normal requests, borderline cases, missing details and tricky ones, each… [All free prompt templates](https://learn.ynteractive.com/content/prompts) ## From the blog - [What Is Vibe Coding? Build a Real Form with Lovable](https://learn.ynteractive.com/content/blog/what-is-vibe-coding): Vibe coding means building software by describing it in plain words to an AI. What it is, what it's good for, and a real Lovable form example. - [Automate a Lead Magnet Welcome Email with AI](https://learn.ynteractive.com/content/blog/lead-magnet-welcome-email): Lead magnet welcome email automation: a signup form sends each lead to an n8n AI agent that tags it, saves it and emails the guide with one tip. - [What Is a Webhook? A Plain-English Guide](https://learn.ynteractive.com/content/blog/what-is-a-webhook): What is a webhook? A URL that waits for data. See how a website form sends JSON to an n8n webhook, which URL to use, and where webhooks fit in a business. ## More visual guides - [Mistake to Avoid: Pasting a Webhook URL into Your Page](https://learn.ynteractive.com/content/visual/mistake-webhook-url-in-the-page): A visual tip: don't paste your n8n webhook URL into the page. Store it as a Lovable secret so it stays out of the source and is easy to change. - [Mistake to Avoid: Testing an Unpublished n8n Workflow](https://learn.ynteractive.com/content/visual/mistake-testing-an-unpublished-workflow): A visual tip: an n8n production webhook URL only works once the workflow is published. Publish first, then copy the URL into your app. - [What Is a Webhook? A Visual Guide](https://learn.ynteractive.com/content/visual/term-webhook-explained): A visual guide to webhooks: a web address that waits for another app to send it data, shown in a real Lovable + n8n lesson, with tips to use it safely. [All visual guides](https://learn.ynteractive.com/content/visual) · [All free tutorials](https://learn.ynteractive.com/content)