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Capture your thoughts privately. Fast, local, and offline-first.
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KV Secure Notes is a premium, zero-transmission note-taking tool designed for top-tier security, privacy, and speed. It allows you to protect your sensitive notes using military-grade AES-256 encryption with a password of your choice, ensuring that your data remains completely unreadable to unauthorized eyes. All notes are stored locally in your browser's IndexedDB, adhering to a strict local-only policy (zero servers, zero transmission). It supports full Markdown formatting, task checklists, tagging, and secure encrypted sharing. You can share any encrypted note by copying its ciphertext package; the recipient can decrypt and import it using the same password without any intermediate server.
Input
# Meeting Notes
- Task 1
- Task 2Output
Rendered HTML with headers and listsInput
Item 1 (checked)
Item 2Output
Interactive list with checkable itemsWe use industry-standard PBKDF2 with 100,000 iterations of SHA-256 to derive a 256-bit key from your password, and encrypt the data using AES-GCM 256-bit. All cryptographic operations run natively in your browser via the Web Crypto API.
No. KaruviLab operates on a strict zero-server policy. All encryption and decryption happen purely client-side, and your password never leaves your browser. Because of this, it is impossible for us to recover forgotten passwords.
No. All notes (including encrypted ciphertext) are saved locally in your browser's IndexedDB database. Your data is 100% private and offline-first.
When you share a note, you copy its ciphertext (an encrypted Base64 package containing the salt, initialization vector, and encrypted payload). You can send this text via any communication channel. The recipient enters the same password to decrypt and view it locally.