Gulzar Ahmed

Only logged-in users can view the frontend or backend if this plugin is activated. The password reset process on wp-login keeps on working.
<ul>
<li>No options/settings</li>
<li>No by-pass</li>
</ul>
<h3>Compatibility</h3>
<ul>
<li>WooCommerce</li>
</ul>
<h3>Usage as MU-Plugin</h3>
This plugin is very simple and can also be used as a must-use plugin. That way no admin of a website can deactivate the plugin, making sure the requirement of just authenticated users is ensured. 
! No automatic updates are made for mu plugins

WP Logged-in Only Basic

A Plugin to lock down the whole site to prevent public access.

GrandPlugins

Protect PDF files by passwords on your WordPress Website. 
PDF Password Protect plugin offers an easy way to set passwords and control edit permissions to your PDF files.
<h3>Features</h3>
<ul>
<li>Add user password to prevent opening the PDF file.</li>
<li>Add owner password to disabled PDF file edit permissions:</li>
</ul>
<h4>Permissions to disable</h4>
<ul>
<li>copy: copy text from PDF file.</li>
<li>print: print the PDF file.</li>
<li>comment: add comments to PDF file.</li>
<li>comment – fill form: Add comments and fill forms to PDF file.</li>
</ul>
<h3>For more features</h3>
👉 <a href="https://grandplugins.com/product/pdf-password-protect?utm_source=free" rel="nofollow ugc">Pro</a> | <a href="https://grandplugins.com/documentation/wp-pdf-password-protect/" rel="nofollow ugc">Docs</a> 👈
<ul>
<li>
Set passwords automatically to uploaded PDF files.
</li>
<li>
Set passwords to bulk PDF files.
</li>
<li>
Remove passwords from PDF files.
</li>
<li>
Overwrite PDF file owner password.
</li>
<li>
Restrict PDF files from view or download
</li>
<li>
Sell WooCommerce Downloadable PDFs protected with a password for each customer.
</li>
</ul>
<h3>Requirements</h3>
The plugin needs two packages to be installed on your server in order to handle complex PDF files that have forms – annotations – bookmarks and to handle some PDF files which use Compressed Cross-reference and Object Streams for data structure.
<ul>
<li>QPDF min V 9.1.1</li>
<li>GhostScript</li>
</ul>
<h3>How to use</h3>
<ul>
<li>Activate the plugin</li>
<li>Upload PDF file</li>
<li>Access the PDF attachment edit page from media page</li>
<li>You can add password to the PDF file from the Sidebar metabox “PDF password options”.</li>
</ul>
<h3>Check Our other plugins</h3>
<a href="https://grandplugins.com/product/woo-order-splitter/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">Woo Order Splitter</a>
<a href="https://grandplugins.com/product/woo-user-orders-limit/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">Woo User Orders Limit</a>
<a href="https://grandplugins.com/product/woo-conditional-gateways/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">Woo Conditional Gateway</a>
<a href="https://grandplugins.com/product/wp-db-controller/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">WP DB Controller</a>
<a href="https://grandplugins.com/product/woo-lemonsqueezy-gateway/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">Woo Lemonsqueezy Gateway</a>
<a href="https://grandplugins.com/product/woo-instock-notifier/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">Woo instock Notifier</a>
<a href="https://grandplugins.com/product/woo-gift-cards/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">Woo Gift Cards</a>
<a href="https://grandplugins.com/product/woo-restrict-orders/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">Woo Restrict Orders</a>
<a href="https://grandplugins.com/product/woo-bulk-price-change/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">Woo Bulk Price & Stock Manager</a>
<a href="https://grandplugins.com/product/woo-variation-sold-individually/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">Woo Variation Sold individually</a>
<a href="https://grandplugins.com/product/woo-paddle-checkout/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">Woo Paddle Checkout</a>
<a href="https://grandplugins.com/product/woo-sales-notification/?utm_source=free&utm_medium==pdf-password-protect" rel="nofollow ugc">Woo Sales notifications</a>
<a href="https://grandplugins.com/product/woo-cart-tracker/?utm_medium=wp&utm_source=pdf-password-protect" rel="nofollow ugc">Woo Cart Tracker</a>
<a href="https://grandplugins.com/product/woo-best-seller/?utm_medium=wp&utm_source=pdf-password-protect" rel="nofollow ugc">Woo Best Sellers</a>
<a href="https://grandplugins.com/product/woo-sales-notification/?utm_medium=wp&utm_source=pdf-password-protect" rel="nofollow ugc">Woo Sales notifications</a>
<a href="https://grandplugins.com/product/woo-advanced-captcha/?utm_medium=wp&utm_source=pdf-password-protect" rel="nofollow ugc">WP Advanced Captcha</a>
<a href="https://grandplugins.com/product/woo-advanced-pricing/?utm_medium=wp&utm_source=pdf-password-protect" rel="nofollow ugc">Woo Advanced Pricing – Discount & Quantity Swatches</a>
<a href="https://grandplugins.com/product/woo-advanced-add-to-cart/?utm_medium=wp&utm_source=pdf-password-protect" rel="nofollow ugc">Woo Best Sellers</a>
<a href="https://wordpress.org/plugins/watermark-images-for-wp-and-woo-grandpluginswp/" rel="ugc">WP Watermark Images</a>
<a href="https://wordpress.org/plugins/coming-soon-products-for-woocommerce" rel="ugc">Coming Soon Products for WooCommerce</a>
<a href="https://wordpress.org/plugins/quick-view-and-buy-now-for-woocommerce/" rel="ugc">Quick View and Buy Now for WooCommerce</a>
<a href="https://wordpress.org/plugins/sidebars-blocks/" rel="ugc">Sidebars Gutenberg Blocks</a>
<a href="https://wordpress.org/plugins/image-block-zoom-on-hover/" rel="ugc">Image Zoom on Hover</a>
<a href="https://wordpress.org/plugins/large-images-uploader/" rel="ugc">Large Images Uploader</a>
<a href="https://wordpress.org/plugins/ultimate-maintenance-mode-for-woocommerce/" rel="ugc">Maintenance Mode for WooCommerce</a>
<a href="https://wordpress.org/plugins/ajax-single-add-to-cart-for-woocommerce/" rel="ugc">Single Ajax Add to Cart For WooCommerce</a>
<a href="https://wordpress.org/plugins/gif-uploader-wp-grandplugins" rel="ugc">GIF Uploader</a>
<a href="https://wordpress.org/plugins/image-sizes-controller/" rel="ugc">Image Sizes Controller</a>
<a href="https://wordpress.org/plugins/gpls-paypal-subscriptions/" rel="ugc">Paypal Subscriptions</a>
<a href="https://wordpress.org/plugins/watermark-pdf/" rel="ugc">Watermark PDF</a>
<a href="https://wordpress.org/plugins/cart-limiter/" rel="ugc">Woo Cart Controller – Qty Limiter</a>
<a href="https://wordpress.org/plugins/simple-countdown/" rel="ugc">Simple Countdown Timer</a>
<a href="https://wordpress.org/plugins/avif-support/" rel="ugc">AVIF Support</a>
<a href="https://wpplugincreator.com" rel="nofollow ugc">WP Plugin Creator</a>

PDF Password Protect

Protect PDF files by passwords on your WordPress Website.

WP Logged-in Only Basic vs PDF Password Protect