Overview

Formlander receives the forms of your sites on your own server. It is one Go program with a SQLite database, shipped as a Docker image, and open source.

• Your data stays on your server. No form service in the middle.
• Any form works. Point an HTML form or a fetch call at it: no schema to define.
• Deliveries: each submission can go to email (SMTP or Mailgun) and to a webhook, with retries.
• Spam protection: allowed sites, fixed rate limits, a honeypot, and Cloudflare Turnstile.
• An admin to create forms, read submissions, download files, and export CSV.

How a submission flows

your form  ──►  Formlander  ──►  SQLite
                    ├──►  email (SMTP or Mailgun), with retries
                    └──►  webhook, with retries

Each form has an address, and a public token that lets someone submit to that form only:

POST https://<your-domain>/forms/<form>/submit?token=<token>

It takes application/x-www-form-urlencoded, multipart/form-data with files, or JSON.

The smallest form

<form action="https://forms.example.com/forms/contact/submit?token=YOUR_TOKEN" method="post">
  <label>Name <input type="text" name="name" required></label>
  <label>Email <input type="email" name="email" required></label>
  <label>Message <textarea name="message"></textarea></label>
  <button type="submit">Send</button>
</form>

Add or remove fields freely: Formlander stores what it gets as JSON. In the form’s settings, put your site in Allowed sites.

Next steps

1. Install Formlander on your server.
2. Sign in, create a form, and copy its address into your HTML.
3. Add the honeypot or Turnstile, and connect email or a webhook: see Integration and Spam and security.

Formlander is open source, MIT licensed: source and releases on GitHub.