Active installationsNewAdoption metric — not a quality score
WordPress.org ratingNo WordPress.org ratings yet
Official packageDirect from WordPress.org
Repository metrics are context, not quality scores. Active installations measure adoption and can strongly reflect a plugin’s age and historical popularity. Ratings, recent updates and “Tested up to” metadata also do not guarantee modern code, error-free operation, security, feature completeness or suitability for a particular site. Why active installs don’t tell the whole story →
WP PlugIndex currently records Pipe9 Media Optimizer version 1.5.2 as active, updated 4mo ago and tested up to WordPress 7.0.
Overview
About this plugin
Pipe9 Media Optimizer converts your uploaded images to WebP automatically — no batch jobs, no manual steps, no complex configuration. When a browser supports WebP (all modern browsers do), the optimized version is served instead of the original, reducing page weight by 25-35% on average with zero visible quality loss.
How it works:
When you upload an image to WordPress, the plugin creates a WebP copy and stores it alongside the original in uploads/pipe9-media-optimizer/webp/. When a visitor loads a page, the plugin detects browser support via the Accept header and serves the WebP version — either through server-level rewrite rules, HTML markup, or a lightweight PHP endpoint.
Key features:
Automatic conversion on upload — JPEG, PNG, and static GIF images are converted to WebP as soon as they hit the media library. Animated GIFs are converted to animated WebP via gif2webp or Imagick (previously a Pro feature — now free!)
Six serving strategies: Apache rewrite rules (zero PHP cost — the fastest option), HTML <picture> wrapping (single buffer scan per page), Nginx config snippet (paste and go — includes theme image rules), PHP passthru endpoint (works on any server), WP Engine optimized mode, or conversion-only mode (no serving changes)
Theme image conversion — scans and converts images inside active theme directories
Bulk conversion — convert your entire existing media library with one click, with a real-time progress bar
Media Library integration — each image gets a format column showing WebP status, with per-image convert and remove actions
Memory guard — automatically detects when an image is too large to convert without blowing through PHP’s memory limit, and skips it gracefully
Pluggable architecture — modules register themselves via WordPress hooks; the Pro add-on adds AVIF and animated format support through the same system
uk) adds:
* Static AVIF conversion (JPEG/PNG/GIF → AVIF) — even smaller files than WebP
Topics listed for this plugin in the WordPress.org directory.
images
media
optimization
webp
Compatibility & maintenance
Compatibility & maintenance
Tested up to WordPress 7.0
Not yet marked as tested with WordPress 7.1. WordPress.org currently lists Tested up to 7.0.
Current WordPress releaseWordPress 7.1
WordPress.org Tested up to7.0
Minimum requirementsWordPress 6.4 · PHP 7.4
Update activity21 Jun 20264mo ago
“Tested up to” is directory metadata supplied by the plugin author. WP PlugIndex does not turn an older declaration into a claim that the plugin is incompatible.
Changes recorded by WP PlugIndex
Recent tracked changes
No tracked version or compatibility changes have been recorded by WP PlugIndex yet.
Tracking & source
WP PlugIndex tracks public WordPress.org directory metadata and records selected version, compatibility and availability changes as they are detected.
