ZeroConfig – Performance & Image Engine

Descripción

ZeroConfig is a speed plugin with one switch. Instead of a page of options (minify this, delay that, combine those), it turns on a set of features that it then checks on your own site, in a real browser, and switches off whatever does not suit your theme and plugins.

• Page cache served from disk, before WordPress loads.
• Image CDN: images are converted to WebP or AVIF, resized per device and served from a CDN. The conversion runs on the service’s servers, not on your hosting.
• CSS and JavaScript minified by the service, deferred where it is safe, and known third-party tags (Tag Manager, Pixel, chat widgets) delayed until the visitor interacts.
• Critical CSS (paid plans), built by the service for each kind of page.
• Safety Check: after you turn it on, the service loads your pages in a real browser with and without each feature and switches off a feature that changes how a page looks or causes JavaScript errors.
• Score Guard (paid plans): a weekly PageSpeed measurement of your home page, with an e-mail if the score drops.

Where the work happens

Image conversion and CSS/JS minification run on the ZeroConfig service, not in PHP on your hosting. Your server stores and serves cached HTML; the plugin rewrites image, CSS and JavaScript addresses to the CDN. See External services below for exactly what is sent and when.

Free and paid plans

Everything the plugin does on your own server is free on every plan: page cache, safe script deferral and third-party script delay. Work done by the service follows the plan.
Free: CSS/JS minification and 500 new images a month converted to WebP/AVIF in every size (each image counts once, whatever its sizes and formats). Optionally, you can show a small «Powered by ZeroConfig» link on your public pages (off unless you tick it) and the free image limit doubles.
Pro ($39/year): unlimited images, critical CSS and Score Guard. Business ($99/year) covers 5 sites; Agency ($199/year) covers 25 sites and adds white-label reports.
CDN delivery is included on every plan under fair use. Paid plans open after the beta and are bought on our website, not inside the plugin.

Features

Page cache served by Apache rewrite rules or a drop-in before PHP starts; WebP and AVIF images resized per device; lazy loading with the largest image above the fold loaded first; CSS and JavaScript minification; safe deferral and delayed third-party tags; critical CSS; Google Fonts with display=swap; browser caching headers; Cloudflare and Varnish purge; purge by URL and WP-CLI; separate cached copies per language (Polylang, WPML) and per currency for multi-currency shops; pages requested with tracking parameters (utm, fbclid, gclid…) served from the cache.

What it does not do

No database clean-up, no combining of CSS or JavaScript files, no crawler that requests your whole site: after a cache purge up to ten of your most important addresses are refilled, a second apart, for at most 20 seconds. No settings to tune.

Works with

Tested with WooCommerce, Elementor and Contact Form 7, and designed for the common page builders and themes. Scripts known to be fragile (sliders, builders, consent managers, payment forms) are on a list the service keeps up to date, and the Safety Check verifies the rest on your actual site.

Requirements

WordPress 6.9 or newer, PHP 7.4 or newer. Single sites only: WordPress multisite networks are not supported yet.

External services

This plugin relies on the ZeroConfig optimisation service (https://zeroconfigwp.com), operated by the plugin author, OmniPure Marketing LLC (United States). The service converts and resizes images, minifies CSS and JavaScript, builds critical CSS and runs the Safety Check. The plugin talks to its API at https://api.zeroconfigwp.com, and your pages load the optimised files from its CDN at https://cdn.zeroconfigwp.com.

Nothing is sent to the service until a site administrator presses Turn on in Settings → ZeroConfig, under a notice listing what is sent. A licence key saved before that stays on the site. While the engine is off nothing is sent at all.

• Connecting (at Turn on): the site address and name, WordPress, PHP and plugin versions, the active theme and the names of active plugins, the web server type and the plugin’s settings state. The administrator e-mail only if the administrator ticks the optional box under Turn on. The service then confirms the site is yours by requesting a one-time code from it.
• While the engine is on: the same information once an hour; a short availability check of the API (no data, at most every 5 minutes, every minute while it does not answer) so the site falls back to its own files when the service is down; a cache purge request with the site address whenever the page cache is emptied; the addresses of a few public pages when critical CSS is built or a Safety Check runs (after Turn on, theme and plugin changes, updates, or when you ask for one); a licence key and the site address when you activate or remove a licence.
• What the service fetches from the public site: images, CSS and JavaScript files referenced by your pages, and a few public pages for the Safety Check and critical CSS. Optimised copies are stored on the service’s servers and delivered through its CDN. Your site’s own CSS and JavaScript are only minified; no code is added to them. Original files are never modified.
• Visitors: the plugin itself never sends visitor data. When the image CDN or minified files are on, your visitors’ browsers load those files from cdn.zeroconfigwp.com, so the CDN receives their IP address, browser user agent and the page that asked for the file, as with any CDN. Cookies, accounts, orders and form entries are never sent.
• Safety Check evidence: when a check has to switch a feature off, the service keeps the browser error messages, the addresses of files that failed to load and before/after screenshots of that public page for 30 days on its own servers (not on the CDN), so the incompatibility can be fixed. They are deleted earlier if the site is forgotten.
• «Something looks off?» form: sends only when an administrator submits it: the message, the optional page address (pages of this site only), the theme and plugin names and which features are on.
• Scheduled tasks: while the engine is on, if the site’s own background tasks have not run for two hours the service opens its public wp-cron.php once. Pages served from the cache never start WordPress, so without this nudge expired cached pages would not be cleaned up on quiet sites.
• Turning it off: Turn off (or deactivating the plugin) sends one last message saying the engine is off, so the service stops the visits above; after that nothing is sent. Deleting the plugin asks the service to forget the site.
• Sub-processors: content delivery by Bunny.net. Payments for paid plans (when they open, on our website, never inside the plugin) by Polar (https://polar.sh) as merchant of record.

Terms of service: https://zeroconfigwp.com/terms
Privacy policy: https://zeroconfigwp.com/privacy

The optional Cloudflare integration calls the Cloudflare API (https://api.cloudflare.com) with a token you enter, only to purge your own zone’s cache when the page cache is purged. Cloudflare terms: https://www.cloudflare.com/terms/ and privacy: https://www.cloudflare.com/privacypolicy/

Score Guard (paid plans): the ZeroConfig service, not the plugin, asks the Google PageSpeed Insights API to measure your public home page weekly. Google terms: https://developers.google.com/terms and privacy: https://policies.google.com/privacy

The plugin also contains lists of third-party domain names (analytics, ad pixels, chat widgets, consent managers, payment and slider scripts). They are used only to recognise scripts your own pages already load, so they can be delayed, deferred or left alone safely. The plugin never connects to those services and sends them nothing.