Form Builder

Build a form that sends encrypted messages to your TSN Relay inbox. All form fields are encrypted client-side with your public key before submission — the relay never sees the plaintext.

Select your key

Looking for an active key on this device…

You need an active key to encrypt form submissions. If you don't have one, generate a key first.

Build your form

Form name

Shown at the top of the shared form and in My forms.

Source label

A label identifying where this form came from.

Kind

Fields

JSON array of field definitions. Each field: name, label, optional required, and optional type (text or textarea). A hidden website honeypot is added automatically.

Test your form

This is the exact form visitors will see. Fill it in and submit to send an encrypted payload to your inbox end to end.

Live preview

How it works. On submit, the page gathers the fields, derives a shared key with your public key using ECDH (P-256), encrypts the payload with AES-GCM, and posts the encrypted blob to /u/<namespace>/submit. The relay stores and forwards the message; only your private key can decrypt it.

Share your form

Send the link, or paste the embed code on any website. Visitors need no account. The link carries only your public key — never your private key.

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Embed code

Iframe is the safest paste-anywhere option. Native HTML needs /form.js loaded once on the page.

Manage saved forms