GetCopas

GetCopas is a secure pastebin with a frontend built purely in HTML and Vanilla JS (no frameworks), backed by Node.js and Express. It features true client-side End-to-End Encryption (AES-256-GCM) where the server never sees the plaintext or the decryption key. Data is temporarily stored using Redis with automatic TTL expiry, while encrypted files are managed directly via presigned URLs to Cloudflare R2 (S3-compatible) storage.