Flowvault

Zero-knowledge encrypted notepad with plausible deniability

Free - Free to use with no account or email required. Vaults support up to 512 KiB total per URL; up to 64 notebooks per URL. Option to store a local .flowvault file for BYO storage.

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About Flowvault

Flowvault is a private, client-side encrypted online notepad that never sends plaintext to the server. One URL can hold up to 64 independent notebooks unlocked by different passwords (plausible deniability). Writes are encrypted in the browser (Argon2id + AES-256-GCM) and the server only stores indistinguishable ciphertext. Features include .fvault zero-knowledge backups for migration or self-hosting, optional local vault files (BYO storage), open-source frontend and Firebase Cloud Functions/Firestore rules, and no account or email required.

Key Features

Client-side, zero-knowledge end-to-end encryption (Argon2id + AES-256-GCM)
Plausible deniability: up to 64 independent notebooks unlocked by different passwords on one URL
.fvault zero-knowledge backup for migration or self-hosting; optional local .flowvault file (BYO storage)
Open-source frontend plus Cloud Functions and Firestore rules
No account or email required; server stores only ciphertext

Who is this for?

Privacy-conscious individuals, journalists, activists, and anyone needing secure, deniable encrypted notes or migrating from tools like ProtectedText/Standard Notes/CryptPad/Privnote.

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Pricing

Free

Free to use with no account or email required. Vaults support up to 512 KiB total per URL; up to 64 notebooks per URL. Option to store a local .flowvault file for BYO storage.