Flowvault is a zero-knowledge encrypted notepad built around plausible deniability. It is intended for private note-taking and file-backed vaults, with a design that lets a single URL hold multiple independent notebooks behind different passwords.
The service says a decoy password is a feature, not a bug. One Flowvault link can contain up to 64 notebooks behind 64 different passwords, and each password opens its own private workspace. It also states that the server sees one indistinguishable blob either way, and that a user can hand over a decoy password if forced while the real notebook remains invisible. A vault can hold up to 512 KiB total, and the encryption listed on the page is Argon2id plus AES-256-GCM. Flowvault also supports restoring a .fvault backup to a new URL, and it advertises a local-vault mode in which the entire vault is stored as a single .flowvault file on the user’s own disk.
Delivery appears to be browser-based and centered on a web URL, with a live demo, an open view, and no account or email required. The page also mentions a browser extension and iOS in the maker line, but not as Flowvault features. It describes the product as open source and end-to-end encrypted. The page includes links for Blog, Security FAQ, GitHub, and Donate, and names a comparison set that includes ProtectedText, Standard Notes, CryptPad, and Privnote.
Flowvault is built by Flowdesk, described on the page as ex-FlowCrypt (iOS + Chrome Ext.). The page also offers a line about bringing your own storage and creating a local vault, and it frames the product as a private, encrypted online notepad where notes never leave the browser in plaintext.
In the Notes & docs space, Flowvault takes a focused approach. It focuses on keeping sensitive notes private and secure without trusting a server or revealing real data under duress. Flowvault is a consumer product aimed at privacy-conscious users. Flowvault costs nothing to use. Flowvault is available on the web and the command line, and it can be self-hosted.
Behind Flowvault is Flowdesk, and the product first shipped in 2026. The project is developed in the open on GitHub with 75 stars and 31 commits in the last 90 days. Among its 9 catalogued features are end-to-end encryption, plausible deniability, and multiple notebooks.
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