# KeyCat opensource password manager

> KeyCat is an open source end-to-end encrypted password manager. This is the web-extension companion to automate auto-filling the forms based on the data stored in the password manager The full source code can be found on https://github.com/keydotcat

Canonical page: [https://chrome-stats.com/d/keycat](https://chrome-stats.com/d/keycat)

## Overview

- **ID:** `keycat`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Key.cat
- **Category:** privacy-security
- **Version:** 0.0.17
- **Last updated:** 2020-04-08
- **First published:** 2018-12-21
- **Size:** 1.12 MB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/keycat/)
- **Website:** [https://github.com/keydotcat](https://github.com/keydotcat)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/keycat/privacy/](https://addons.mozilla.org/firefox/addon/keycat/privacy/)

## Description

KeyCat Open Source Password Manager is a web-extension companion for Firefox. It provides end-to-end encryption and auto-filling of forms using stored data.

## Rankings

- #143,362 — Overall

## Permissions and access

### Permissions

- `tabs`
- `storage`
- `clipboardWrite`
- `idle`
- `http://*/*`
- `https://*/*`
- `webRequest`
- `webRequestBlocking`

### Content script matches

- `*`
- ``

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension support email may not be valid

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

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- [PfP: Pain-free Passwords](https://chrome-stats.com/d/pfp-pain-free-passwords) — 3 users, 4.50 / 5
- [Passy - Password Manager Browser Extension](https://chrome-stats.com/d/passy) — 15 users, 5.00 / 5
- [Akeyless Password Manager](https://chrome-stats.com/d/akeyless-password-manager) — 3 users
- [Northguard Password Manager](https://chrome-stats.com/d/northguard-password-manager) — 5 users
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- [Passbolt - Open source password manager for teams](https://chrome-stats.com/d/passbolt) — 34,664 users, 4.44 / 5
- [CommonKey Team Password Manager](https://chrome-stats.com/d/commonkey-team-password-manage) — 7 users, 5.00 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/keycat)