Is Last-Modified and If-Modified-Since Headers free?

Yes, Last-Modified and If-Modified-Since Headers is free to use. It is available as a free plugin on WordPress.org.

How many websites use Last-Modified and If-Modified-Since Headers?

Last-Modified and If-Modified-Since Headers has 200 active installations as tracked by WordPress.org.

What are the best Last-Modified and If-Modified-Since Headers alternatives?

Popular alternatives to Last-Modified and If-Modified-Since Headers include Headers Security Advanced & HSTS WP, WP Hide & Security Enhancer, Unique Headers. You can compare them side-by-side on our comparison pages.

Does Last-Modified and If-Modified-Since Headers work with the latest WordPress?

Last-Modified and If-Modified-Since Headers has been tested up to WordPress 5.7.15. It requires WordPress 5.2.4+ and PHP false+.

Last-Modified and If-Modified-Since Headers — Reviews, Rating & Alternatives (2026)

Name: Last-Modified and If-Modified-Since Headers
Rating: 5 (2 reviews)
Author: zubovd

As of April 2026, Last-Modified and If-Modified-Since Headers is a WordPress headers plugin with 200 active installations and a 5/5 rating from 2 reviews. It has been downloaded 2.5K+ times in total. Requires WordPress 5.2.4+ and PHP false+. Available on WordPress.org since 2021. Last updated 4 years ago — may have compatibility concerns. Top alternative: Headers Security Advanced & HSTS WP.

5/52 reviews

200active installs

2.5K+total downloads

5 yearssince 2021

Overview

This plugin adds the ‘Last-Modified’ header to each post and returns the ‘304 Not Modified’ header to the client without a body in the response if he sent the ‘If-Modified-Since’ header and the post has not changed since that date.

Read full description on WordPress.org