Flowvault

An open-source zero-knowledge encrypted online notepad. Argon2id + AES-256-GCM, plausible-deniability hidden volumes, multi-notebook tabs per password, a client-wrapped trusted handover that releases the vault to a beneficiary if you stop checking in, drand-backed time-locked notes, self-destructing Encrypted Send for notes and Encrypted File Send for files (up to 10 MiB) with a secure delete link, Bring-Your-Own-Storage local vaults stored as a single .flowvault file on your disk, and a .fvault encrypted backup format that round-trips every slot without decrypting anything server-side.