PQCServer is a zero-knowledge platform for post-quantum encrypted messaging, secure file storage and quantum-safe document notarization. Built on NIST 2024 standards. Everything runs in your browser — the server never sees your keys or your content.
Send text messages and files encrypted with ML-KEM + AES-256-GCM. Share via a simple shortlink. The recipient decrypts in their browser — no app, no account required to receive. Enable burn-after-read for self-destructing messages.
Learn more →Store encrypted files permanently in your personal vault. No size limits — files are split into chunks and stored. Share files with specific users or generate shareable shortlinks. Your files are encrypted before they leave your browser.
Learn more →Prove a document existed at a specific moment in time. Sign with your ML-DSA key, get a server-countersigned Notary Receipt with cryptographic timestamp. Anyone can verify authenticity without downloading any software.
Learn more →No installation. No plugins. Just a browser.
pqcserver.com/m/xxx anywhere — email, chat, SMS.All cryptographic operations happen in your browser. The server stores only ciphertext it mathematically cannot decrypt. By design, not policy.
ML-KEM (FIPS-203) for encryption and ML-DSA (FIPS-204) for signatures — the same algorithms adopted by Google, Cloudflare and the US federal government.
Every message gets a shortlink. Paste it in Gmail, WhatsApp, Slack, SMS. Recipients need no account to decrypt — just their private key.
Messages are permanently deleted the moment the recipient opens them. Nothing lingers on our servers beyond what you allow.
Files are split into 3MB encrypted chunks and stored in MongoDB GridFS. Upload gigabytes — no single request ever approaches Cloudflare limits.
Add one line of code to any website. Opens an inline modal with the full encryption flow — no redirect, no new tab. Perfect for onionmail.org and similar privacy services.
Document hash + ML-DSA signature + server timestamp = a Notary Receipt. The document never leaves your browser. Anyone can verify authenticity with the receipt ID.
Register a username. Share pqcserver.com/u/you — anyone can send you encrypted messages without knowing your key.
Integrate PQCServer into your own applications. Upload files, send messages and verify notary receipts programmatically without building the cryptography yourself.
State actors are intercepting and storing encrypted communications today, waiting for quantum computers powerful enough to decrypt them. This attack — called "Harvest Now, Decrypt Later" — means data encrypted with RSA or ECC right now is already at risk. PQCServer uses ML-KEM and ML-DSA — NIST-standardized algorithms designed to resist both classical and quantum computers.
Free. No credit card. Ready in 60 seconds. Your keys never leave your browser.