Messages vanish and accounts get deleted. Seal your chat as tamper-evident evidence while you still have it. Seal my chat

Seal a chat export, in your browser

Your chat, sealed as tamper-evident evidence. It never leaves your browser.

Upload a WhatsApp export or a Signal file, preview a free watermarked transcript, then seal a court-ready package. Everything runs in your browser.

Choose your platform

ProofSnap seals your transcript and proves it has not changed. It does not claim who wrote each message; the court decides authorship.

$39.99
certified package
eIDAS
qualified timestamp option
SHA-256
in-browser hashing
0 bytes
of your chat uploaded

    Only a SHA-256 hash ever leaves your device. Open your browser's DevTools Network tab to confirm.