BuildSync

Private by design

Share sensitive information securely

Create a private message, password, API key or secret and share it using a one-time link and QR code. It expires on your terms.

How it works

01

Create Secret

Write the content, choose how long it lives, and set a view limit.

02

Share Link / QR

Send a unique link or QR code. Nothing sensitive is in the URL itself.

03

Receiver Reveals Secret

The recipient opens a protected landing page and chooses to reveal.

04

Secret Expires Automatically

Time or view limits — the ciphertext is then wiped.

Built for privacy

Secure encryption

Your secret is encrypted with AES-256-GCM before it is stored.

Expiring links

Automatically expire secrets after a selected time window.

View limits

Control how many times a secret can be revealed, including once-only.

QR sharing

Generate a QR code for in-person or mobile sharing without extra apps.

Password protection

Add an extra password that is hashed, never stored in plaintext.

No account required

Create and share secrets without registration or identity tracking.