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Skip to contentLocal checklists for passkeys, sealed notes and proofs.
Full tool — runs in your browser. No sign-up required.
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Local checklists for passkeys, sealed notes and proofs.
Developer utilities should be fast, copy-friendly, and predictable. Paste or drop input, get a reliable result — no CLI install required.
Use this free Security Recipes whenever you need a browser-local result without creating an account.
Open the Security Recipes page — no registration required.
Paste, upload, or configure your input.
Review the live result and adjust options.
Copy or download the output to your device.
Processing is designed to stay in your browser session unless a mode explicitly notes a network call.
LocalThis tool processes data locally in your browser. Tentaco does not receive your file contents for this mode.
Local checklists for passkeys, sealed notes and proofs. Open the tool in your browser — no account or install required.
Yes — runs locally in your browser.
No — processing runs locally in your browser. Your files and inputs do not leave your device unless the tool explicitly uses the network.
Explain Mode online — free
Plain-language explainers for passkeys, CSP, OTS and more.
Policy Tester online — free
Analyze CSP, HSTS, CORS and Permissions-Policy headers.
Security Recipe Builder online — free
Compose local security recipe pipelines from building blocks.
Certificate Inspector online — free
Inspect PEM X.509 certificates and fingerprints.
File Timestamps online — free
Hash files and stamp them via OpenTimestamps calendars.
Secret Sharing online — free
Split and restore secrets with Shamir threshold shares.
Recovery Key Generator online — free
Generate printable vault recovery keys in your browser — offline-friendly strings for backup and emergency access.
Encrypted Notes online — free
Seal notes with libsodium secretbox and Argon2id.