KeyPlus documentation

KeyPlus is a local-first encrypted password vault for Windows and Linux. It has an interactive terminal interface and a PySide6 desktop interface over the same vault and application services.

0.3 development documentation: These pages describe the KeyPlus 0.3 source currently under development. KeyPlus 0.2.9 is the previous release and uses an incompatible legacy storage design. Do not assume that a Store or release package contains 0.3 until that package identifies itself as 0.3.

KeyPlus has not received an independent security audit. The documentation describes its implementation and boundaries; it does not guarantee protection against every attack or implementation defect.

Getting started

Install the 0.3 development source, create a vault, or migrate 0.2 data.

Desktop guide

Unlock the GUI and manage entries and backups.

CLI reference

Use the interactive KeyPlus command workspace.

Vaults, migration, and backups

Understand data locations, backup restoration, and 0.2 migration.

Security design

Cryptographic design, application behaviour, and limitations.

Technical overview

Application layers, persistence, sessions, and internal vault format.

Packaging and platforms

Source, Debian, Snap, and Windows build behaviour.

Troubleshooting

Resolve unlock, migration, locking, and vault-file problems safely.

KeyPlus has no supported public Python API or stable public vault-format specification. Contributor-facing internals are documented only to explain the current implementation.