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CloakBin CloakBin

About CloakBin

Zero-knowledge encrypted pastebin built for privacy and security.

Our Mission

CloakBin exists to provide a simple, secure way to share text and code online. In an era where data breaches and privacy violations are commonplace, we believe that true privacy should be the default, not a premium feature.

We're building tools that respect your privacy without compromise. Your data belongs to you, and only you should have access to it.

Zero-Knowledge Encryption

What is Zero-Knowledge?

Zero-knowledge encryption means that we cannot read your pastes. Ever. Your content is encrypted in your browser before it's sent to our servers. The encryption key never leaves your device.

How It Works

  1. 1. You write your content in the editor
  2. 2. A random encryption key is generated in your browser using Web Crypto API
  3. 3. Your content is encrypted client-side using AES-256-GCM
  4. 4. Only the encrypted data is sent to our servers
  5. 5. The encryption key is embedded in the URL fragment (#key) - never sent to the server
  6. 6. When someone opens the link, their browser decrypts the content locally

What This Means For You

  • • We can't read your pastes (even if we wanted to)
  • • Law enforcement can't force us to decrypt your data (we can't)
  • • Hackers who breach our database get useless encrypted blobs
  • • You're protected from data breaches and leaks

Core Features

Burn After Read

Self-destructing pastes that delete after first view. Perfect for one-time secrets.

Password Protection

Add an extra layer of security with password-protected pastes.

Syntax Highlighting

Auto-detect language and beautiful syntax highlighting for code.

Flexible Expiry

Choose when your paste expires: 1 hour, 24 hours, 7 days, or longer.

Technology

CloakBin is built with modern, battle-tested technologies:

  • • SvelteKit - Fast, modern web framework
  • • Web Crypto API - Browser-native AES-256-GCM encryption
  • • MongoDB - Scalable database for encrypted content
  • • Vercel - Global edge network for fast delivery

Open Source

CloakBin's core is open source. We believe security through transparency is the only way to build trust. You can review our code, verify our encryption implementation, and contribute improvements.