The toolkit.
Every browser tool below is free. No account. No tracking. No upload. Your data is encrypted on your machine and never touches a server. Pick one based on what you're protecting and how you'd lose it.
Decoys you couldn't write yourself.
The realism engine generates shape-correct, validator-passing decoys across sixty-nine credential types: API keys, crypto wallets, healthcare records, bank and securities identifiers, government IDs. Declare the type, get a fake that passes the same checks the real one would. The engine sees the type. It never sees your real secret.
sk-proj-1a2b3c4d5e6f7g8h9i0j1k2l3m4n5o6p7q8r9s0t…
include error famous fantasy parade mountain spatial void stumble loyal shop segment
FR47 3915 7204 8629 1048 57
postgres://admin:x7kQ9mP2rL4vW8nJ@db-prod-01.acme-internal.net:5432/maindb
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyXzQ1NiIsImlhdCI6MTcxNTAwMDAwMH0…
4532 1872 3456 7891
Click the refresh icon on any card to generate a fresh decoy from the live engine.
All sixty-nine credential types, by category
Cloud, API & infrastructure (32)
Crypto wallets (4)
Healthcare (5)
Finance & securities (10)
Government & identity (8)
Network, device & contact (8)
Unstructured catch-alls (2)
Validators include Luhn (credit cards), mod-97 (IBANs), BIP39 checksum, JWT structural, PEM tag, NHS Modulus 11, US SSN structural, UK NI prefix rules, Bitcoin Base58Check, and E.164 phone format. Examples above are real engine output, regenerable on click. Read the architecture.
Try the live engineChrome Extension
Encrypt text right from your browser. Right-click any selected text to protect it. Zero network requests.
FreeCLI
Encrypt, protect, and manage secrets from your terminal. Minimal dependency surface.
FreeTelegram Bot
Encrypt messages and secrets inside Telegram. @denyshbot
Free1Password Sync
Push and pull control files to 1Password. deny-sh 1p push
Bitwarden Sync
Push and pull control files to Bitwarden. deny-sh bw push
Cloud Backup
Encrypted backup archives to Google Drive, Dropbox, S3, or local. deny-sh backup push