ExpandOps

Access Code Lite lets you require a simple URL parameter code (e.g. ‘?access_code=enter123’) before visitors can view your site. 
Simply share the private access link (e.g. https://example.com?access_code=enter123) that the plugin generates to any user who you wish to grant access. 
Ideal for development, staging, previews, or private sharing without complex authentication.
Features: 
– Set a custom access code from the plugin settings page. 
– Code can be 3–12 characters, letters and numbers only. 
– Session persistence (default): visitors only need to enter the code once per visit. 
– Logged-in users, WordPress login, password reset, admin, AJAX, and cron are always allowed.
Important: Access Code Lite is not a security plugin. 
It does not encrypt, hide, or protect sensitive data. It only adds a simple URL parameter check and should be used for low-risk scenarios like development, staging, or preview access. 
Do not rely on this plugin to secure private or confidential information.
More persistence options (cookies, tokens, etc.) will be added in future versions.

Access Code Lite

Restrict site access with a simple URL code parameter and grant access using private link sharing. Ideal for sites in development or maintenance.

Christian Sabo

Sometimes it is useful to know if – or when – a user successfully logged in to WordPress. Loginpetze generates a notification mail for this incident. This is a conveniant way to e.g. monitor staging sites for customer logins. No need to regularly take a look at statistics or tracking tools. Mails are customizable with shortcodes. All texts are translatable.
Loginpetze 1.x is not compatible with WordPress Multisite.
<h3>Translations</h3>
If you wish to help translate this plugin, you are most welcome! 
To contribute, please visit <a href="https://translate.wordpress.org/projects/wp-plugins/loginpetze/" rel="nofollow ugc">translate.wordpress.org</a>
Keep in mind that if you’re not PTE or GTE for your language, you have to notify someone to approve your contributed strings. This can be done via <a href="https://wordpress.slack.com/" rel="nofollow ugc">Slack</a> or by writing a request on <a href="https://make.wordpress.org/polyglots/" rel="nofollow ugc">https://make.wordpress.org/polyglots/</a>
To find the translation team for your locale, please visit <a href="https://make.wordpress.org/polyglots/teams/" rel="nofollow ugc">https://make.wordpress.org/polyglots/teams/</a>
<h3>Credits</h3>
Special Thanks go to <a href="https://profiles.wordpress.org/kau-boy/" rel="nofollow ugc">Bernhard Kau</a>, <a href="https://profiles.wordpress.org/zodiac1978" rel="nofollow ugc">Torsten Landsiedel</a>, <a href="https://profiles.wordpress.org/pixolin/" rel="nofollow ugc">Bego Mario Garde</a> and <a href="https://profiles.wordpress.org/tfrommen/" rel="nofollow ugc">Thorsten Frommen</a>.

Loginpetze

I liked this plugin, I will use it on two of my sites. Especially for you, I translated the plugin into Russian, I think our users will also need such a plugin and they can comfortably work with it. I recommend to everyone.

Nice plugin. I recommend to everyone.

Notifies the admin by email as soon as a user has successfully logged in. The mails are customizable, the plugin is completely translatable.

Access Code Lite vs Loginpetze