Download websites that use WPMU DEV Smush

About WPMU DEV Smush

Most site owners meet the weight of their own images as a problem to be plugged rather than a pipeline to be fixed. Installing something that compresses uploads is cheaper than changing how a team produces pictures, and the choice leaves a trace that a crawler can read.

WPMU DEV Smush is a WordPress plugins plugin from WPMU DEV, written in PHP and available since 2009 under a Freemium model. The plugin compresses and resizes images on upload, adds lazy loading, converts formats and can route delivery through the vendor's own network, which folds an optimisation habit and a delivery decision into a single install.

The Freemium model creates the first thing a buyer must not get wrong. Free and paid tiers share a front end footprint, so nothing in the data separates a paying customer from someone who installed the free version and forgot about it. Any attempt to read revenue or paid market share from this count will overstate the customer base by an unknown factor. The number is an install base, and treating it as anything else is guesswork dressed up as analysis.

Versions give a sharper picture than the total does. Across the sites where a release string is readable we see 121 distinct versions in the wild, with 4.3.3 recurring across a large part of that group and the rest scattered over older builds. A performance plugin running years behind its own release schedule is both a small irony and a useful signal, because it identifies sites where somebody once cared about page speed and then stopped maintaining anything at all. Hosting, security and maintenance vendors prospect exactly that segment, and it is easier to find in bulk than by inspection.

As of October 2026 the plugin is detected on 66,904 sites, 26,254 of them in United States, and the domain mix is led by .com. The shape follows content management system adoption more than anything specific to images, so country is a weak axis for segmenting this population. Version, co-installed caching or delivery network technology, and the presence of a shop are much stronger cuts through the same rows.

Detection limits are ordinary but worth naming. The fingerprint comes from front end assets and markup on the page that was fetched, so an install that leaves no visible trace on that particular page can be missed, and assets left behind by a removed plugin can linger for months. Version strings are stripped by some optimisation stacks, which is a mild circularity given what this plugin does, so an absent version is not evidence of a stale install.

The reason to take the whole list rather than query a domain is that every useful question here is comparative. Which sites carry an image optimiser and still serve heavy pages, which run a release from several years back, which pair a free optimiser with expensive hosting, and which removed the plugin between two crawls. A lookup returns a fact about one site. The download returns a segment you can sell into, audit, or measure over time.