Yes, Lockr is free to use. It is available as a free plugin on WordPress.org.

How many websites use Lockr?

Lockr has 20 active installations as tracked by WordPress.org.

What are the best Lockr alternatives?

Popular alternatives to Lockr include Email Encoder – Protect Email Addresses…, PDF Password Protect, wL Email Encrypter. You can compare them side-by-side on our comparison pages.

Does Lockr work with the latest WordPress?

Lockr has been tested up to WordPress 5.7.15. It requires WordPress 2.7+ and PHP 5.5+.

PluginSift

Lockr

Name: Lockr
Rating: 5 (1 reviews)
Author: Chris Teitzel

Lockr is the first API & Encryption key management service for WordPress, providing an affordable solution to secure secrets used by plugins.

By Chris Teitzel·Encrypt·Free

5(1 reviews)

·20 active installs·Updated 4 years ago

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As of April 2026, Lockr is a WordPress encrypt plugin with 20 active installations and a 5/5 rating from 1 reviews. It has been downloaded 3.8K+ times in total. Requires WordPress 2.7+ and PHP 5.5+. Available on WordPress.org since 2016. Last updated 4 years ago — may have compatibility concerns. Top alternative: Email Encoder – Protect Email Addresses….

5/51 reviews

20active installs

3.8K+total downloads

10 yearssince 2016

Overview

API & ENCRYPTION KEY MANAGEMENT FOR WORDPRESS

Lockr is the first hosted secrets management solution for WordPress, providing an affordable solution for all sites to properly manage site secrets such as API and encryption keys used by their plugins. Lockr’s offsite key management solution protects against critical vulnerabilities, delivers best-practice security to help sites comply with many industry regulations, and provides a Defense in Depth approach to securing your data. Lockr also provides AES-256 encryption to your custom plugins in a seamless manner to protect data at rest in your site. And best of all, even though it delivers enterprise-grade key management, you can try it for 2 weeks free! Learn more at http://www.lockr.io.