---
title: "Introduction to OpnForm"
description: "An open-source form builder"
---

import CloudVersion from "/snippets/cloud-version.mdx";

OpnForm is an open-source form builder designed to empower developers and users alike. This technical documentation serves as your comprehensive guide to understanding, implementing, and contributing to OpnForm.

<Note>For end-user documentation, feature explanations, and usage guides, please refer to our [Help Center](https://help.opnform.com).</Note>

<Info>
  Self-hosted OpnForm can be used without an Enterprise license for core
  functionality. Free self-hosted instances include OIDC within a 2-user
  instance limit. Adding more users and advanced self-hosted features require
  license activation. See [Self-hosted
  License](/deployment/self-hosted-license).
</Info>

<CardGroup cols={2}>
  <Card title="Cloud Version" icon="cloud" href="https://opnform.com/?utm_source=docs&utm_medium=introduction&utm_campaign=cloud_version">
    Managed service with high availability and security.
  </Card>
  <Card title="Deploy" icon="server" href="/deployment">
    Self-host OpnForm for full control and customization.
  </Card>
  <Card title="Contribute" icon="code-branch" href="/contributing">
    Join our open-source community and contribute.
  </Card>
  <Card title="API Reference" icon="book" href="/api-reference">
    Integrate OpnForm with our comprehensive API.
  </Card>
</CardGroup>

## Features

-   🚀 No-code form builder with unlimited forms, fields & submissions
-   📝 Various input types: Text, Date, URL, Phone, Email, Checkboxes, Select, Multi-Select, Number, Star-ratings, File uploads & more
-   🌐 Embed anywhere (website, Notion page, etc.)
-   📧 Email notifications for form owners & respondents
-   🔒 Hidden fields and form passwords
-   🔗 URL form pre-fill
-   💬 Slack and Discord integrations
-   🪝 Webhooks
-   🧠 Form logic and AI-powered form generation
-   🎨 Customizable colors, images, and custom code
-   🛡️ Captcha form protection
-   📅 Form closing date
-   🔢 Limit on number of submissions
-   📊 Form analytics
-   📁 File uploads
-   🆔 Unique submission ID
-   📱 Single or multi-page forms
-   🔍 Form templates for inspiration
-   🔄 Editable submissions
-   🌐 Custom domain
-   🏷️ Remove OpnForm branding
-   🔔 Form confirmation emails
-   ...[and more](https://opnform.com/pricing)!

<CloudVersion />