Best password manager extensions

Bitwarden is the one we would point most people to. The free tier has no cap on passwords or devices, the code is public and outside firms audit it regularly. The extension fills logins, saves new ones and generates passwords. Your vault is encrypted on your device before it syncs to Bitwarden's servers, and you can host the server yourself.

Transparency is its strength. The client apps, including the browser extension, are on GitHub. Its audit page lists penetration tests and code reviews by Cure53, among others, with the extension and autofill overlay covered in 2025 and the extension in 2023. It also holds SOC 2 Type 2 and ISO 27001 certifications and runs a bug bounty on HackerOne. The free plan adds a password generator, passkey support and encrypted export.

The interface is plainer than 1Password's, but it does the job in every browser. Free accounts can share items with one other person, enough for a couple but not for a family. Paid plans add an integrated authenticator, file attachments, emergency access, security reports and two-step login options such as hardware security keys and Duo. The same vault works in a web app, desktop and mobile apps and a command-line tool. Unless you need something specific, start here.

1Password is the one to pick if you want the smoothest experience and are happy to pay. Its extension fills logins, saves new ones, generates passwords and handles passkeys in Chrome, Firefox, Edge, Safari and Brave. It pairs with the desktop app through native messaging, which enables features such as system-level unlock.

The design differs from most rivals. Your data is protected by your account password and a separate 128-bit Secret Key that only you hold, so a stolen password alone is not enough to decrypt a vault. 1Password says everything in an account is end-to-end encrypted and that independent experts regularly assess it. It holds SOC 2 Type 2 certification and runs a bug bounty on HackerOne.

The code is not open, so those assessments are what you have to go on. In October 2023 1Password disclosed suspicious activity on its internal Okta account, caused by Okta's own support-system breach, and reported no compromise of user data. There is no permanent free plan, only a 14-day trial, then individual and family plans. If you want a free option, look at Bitwarden. If you want polish and will pay for it, this is it.

Proton Pass is a good fit if you already use Proton or care about privacy first. It is the password manager from the company behind Proton Mail and Proton VPN. The extension fills logins, saves new ones and generates passwords, and syncs with Proton's mobile apps and web app. It is listed for Chrome, Firefox, Edge and Safari, and Proton also offers a Brave download.

The free plan, Proton Free, is a real one with unlimited logins and devices, not a trial. Paid plans (Pass Plus, Pass Family and Proton Unlimited) add features. The extension's source is public in Proton's WebClients repository on GitHub. Cure53's July 2023 report called the overall security state commendable, and Proton said all findings were resolved except one medium-severity Android issue. A second audit by Recurity Labs, published on 12 May 2026, rated the posture "well above par", with no remote exploits or encryption bypasses found.

The trade is a younger product and a shorter track record than Bitwarden's, so it is worth reading the audit reports yourself. You also need a Proton account, which is free, and Opera users install the Chrome version from the Chrome Web Store. If you want your passwords inside a privacy-focused ecosystem, this is a strong choice.

KeePassXC-Browser is for people who want their vault as a file on their own machine, with no company account. It is the official extension for KeePassXC, a free, open source password manager that stores your vault in a local database file. The extension holds no passwords itself: it asks the desktop app on your computer for the right login when you visit a site.

That design has real appeal. There is no vendor account, no cloud service to breach and no subscription. The extension code is on GitHub under GPL-3.0 and runs on Manifest V3 in Chrome. It is listed on the Chrome Web Store, Firefox Add-ons and Edge Add-ons, and KeePassXC's documentation also lists support for Vivaldi, Brave and Tor Browser. The Firefox listing shows a release in October 2026.

The costs are practical. You need the KeePassXC app installed and unlocked, connected through the browser's native messaging feature. You are also responsible for backing up the database and syncing it between devices, for example with a file-sync tool you already trust. We found no Safari listing. It suits technical users who value control over convenience.

iCloud Passwords is the obvious pick if your phone and Mac are Apple and you want your saved logins in Chrome, Edge or Firefox without paying for or setting up anything new. It is Apple's own extension and holds no vault of its own. It fills passwords from your iCloud Keychain, saves new logins back to it so your other Apple devices can use them, and can generate verification codes from QR codes.

On a Mac you need iCloud Keychain turned on. On Windows you use the iCloud for Windows app, and Apple says that once iCloud Passwords is set up there, your passwords are available in Chrome, Edge and Firefox. You enable the extension from its toolbar button with a six-digit code shown on your PC. It is free, and Safari needs no extension because it reads iCloud Keychain directly.

The trade is reach. There is no Linux or Android desktop route, no standalone vault and no sharing controls to match a dedicated manager. Store ratings are low, about 2.6 on Chrome and 2.4 on Edge, with Windows sync and re-enable complaints in Edge reviews. If you also use Android or Linux, choose something cross-platform.

Keeper is a good fit if you want a mature paid manager with published compliance credentials and business features. It is from Keeper Security, and its extension fills logins, saves new ones and generates passwords in Chrome, Firefox, Edge and Safari. Keeper describes itself as zero-knowledge, meaning vault data is encrypted and decrypted on your device and is not accessible to the company.

Its security page lists SOC 2, ISO 27001, 27017 and 27018, FedRAMP High for its government cloud, and FIPS 140-3 validation. It says outside experts run quarterly penetration tests, and it runs a bug bounty through Bugcrowd. The Personal plan covers unlimited passwords and devices, and the Family plan covers up to five users with shared folders and emergency access.

These are the company's own statements, and the code is closed, so you cannot check them against the source. A Google researcher found a flaw in the extension in 2017, which Keeper fixed. Keeper says it has never had a vault breach, and we found no independent report of one. There is no permanent free plan, only a 30-day trial, and BreachWatch dark web monitoring and file storage cost extra. For one person on a budget, Bitwarden or Proton Pass cost less.

Enpass suits people who like the local-vault idea of KeePassXC but want a friendlier app. Enpass says every plan keeps your vault in your own iCloud, Google Drive, OneDrive, Dropbox, Box or Nextcloud storage, and that it does not keep your data on its servers. Its security page also lists WebDAV as a sync option.

The browser extension holds no logins. It fills them from the Enpass desktop app, which has to be installed and running. It is listed for Chrome, Firefox and Edge, and Enpass also offers a Safari one bundled with the Mac app (macOS 12 or later). Passkeys, cards and other items are supported alongside logins. The free plan holds up to 25 items in one vault, and paid Premium and Family plans remove that limit.

The software is closed source. Enpass says it is ISO 27001 certified and has passed a SOC 2 Type II audit, but those are its own statements, and we did not see an audit report published openly. It points to a Trust Center for certification details. Treat it as a well-liked product with weaker public proof of its security than the open-source options.