SlimPress turns off parts of WordPress core that your site does not use – emoji scripts, XML-RPC, the REST API for logged-out visitors, Heartbeat, comments, feeds, author and date archives, search, revisions, image sizes, block editor extras, dashboard clutter, automatic updates, admin emails and mo
PricingFree downloadThe WordPress.org download is free. Pro versions, add-ons or external services may cost extra.
CompatibilityRequires WordPress 6.8 and PHP 7.4.
SourceWordPress plugins · Oct 27, 2026
01 / Source details
Aboutthistool.
SlimPress turns off parts of WordPress core that your site does not use – emoji scripts, XML-RPC, the REST API for logged-out visitors, Heartbeat, comments, feeds, author and date archives, search, revisions, image sizes, block editor extras, dashboard clutter, automatic updates, admin emails and more – grouped by area and explained in plain language. A built-in performance test compares your own pages with and without SlimPress, without changing your settings.
What makes it different:
Every toggle is free. No pro tier, no upsells, no nag banners, no telemetry.
“What might break” on every switch , plus a warning when an active plugin relies on the feature you are about to switch off.
An honest impact badge on every toggle, including “None – cleanup only”.
A performance test that tells the truth. It loads your pages with and without SlimPress’s features in the same run and says “within noise” when the difference is too small to be reliable. It also shows what each plugin, the theme and WordPress core add to the page, marking the files SlimPress can remove. It can measure each feature individually and report which autoloaded options each request loads from the database.
Undo for every change. SlimPress keeps the last 10 versions of its settings, so any save, preset, import or reset can be undone.
What SlimPress deliberately does not do: page caching, minification, “remove unused CSS”, JavaScript delays, per-page script managers or CDN rewrites. Features must serve the purpose of turning off something WordPress core does.
Nothing is switched off until you switch it off. Every switch is a runtime filter, so deactivating SlimPress restores WordPress’s default behaviour on the next request. SlimPress never writes to core tables or core options itself, except when you click the one-off “Delete old revisions” button and confirm. Retention limits also have lasting effects: when you set a limit for revisions, trash, WooCommerce scheduled actions or logs, WordPress or WooCommerce permanently deletes anything that exceeds it. Media switches affect the image copies created during upload; switching them off or deactivating SlimPress does not recreate missing copies or restore deleted data.
Front-end – emoji scripts, generator tag, RSD, shortlink, feed and REST links in the page head, global styles, core block CSS, Dashicons and jQuery Migrate for visitors, the image lightbox, speculative loading, smart quotes – plus “Load the next page before the click”.
APIs & connections – XML-RPC, the REST API for logged-out visitors (with an allowlist), the REST user list, Heartbeat per location, WP-Cron on page load, oEmbed, auto-embeds, application passwords, the Abilities API, the AI client and Connectors screen, and calls from wp-admin to outside servers you choose.
Comments – comments site-wide or per post type, closing comments while keeping old ones visible, pingbacks and self-pingbacks, links in comments, avatars and Gravatar.
Content & URLs – feeds, author and date archives, attachment pages, search, the core sitemap or just its users sitemap, ?author= username lookups, 404 redirect guessing, a fast 404 for missing files, post formats.
Revisions & autosave – revision limits, autosave interval, trash retention, plus a one-off “delete old revisions” button that asks first.
Media – the extra 1536px and 2048px image copies, selected image sizes, saving new images as WebP or AVIF, in-browser image processing, PDF preview images, and Openverse in the media inserter.
Block editor – welcome guide, the default fullscreen mode, patterns from WordPress.org, the Font Library and Google Fonts, Notes, block directory, command palette, the classic editor for chosen post types and the classic widgets screen.
Dashboard & admin – dashboard widgets, help tabs, “Howdy”, admin bar items, footer text, update notices for non-admins, the Customizer on block themes, and the notices and dashboard widgets of plugins you choose.
Updates – automatic updates for core, plugins, themes and translations.
Emails – the admin emails WordPress sends about updates, new users and password changes, the admin email check screen and recovery mode emails.
Security – file editing, installing from the dashboard, Post via email, the login language switcher, the front-end password meter.
Site Health & privacy – the weekly Site Health check, the Site Health screen and the privacy tool menus.
Assets – load a plugin’s CSS and JavaScript only on the pages that use it. Choose between Everywhere, Only on chosen pages, Everywhere except, or Nowhere on the front end. Scan plugins to see which plugins load files and measure their total size.
WooCommerce (only shown while WooCommerce is active) – shop assets and order attribution scripts on non-shop pages, product gallery effects, Analytics, the Marketing hub, remote and marketplace suggestions, usage tracking, background thumbnail regeneration, the order count in the admin menu, Action Scheduler’s extra background requests from wp-admin, and how long Action Scheduler and log files are kept.
Each group has an on/off switch of its own, so you can pause a whole group while you look for a problem and restore it exactly as it was. The Overview tab counts the requests and outside calls SlimPress has blocked today and over the last 30 days.
Presets
The Overview tab offers site-wide presets (Safe defaults, Blog, Brochure site, WooCommerce store, Headless). A preset only enables SlimPress switches: it shows you what it would change first, skips anything an active plugin relies on, and leaves everything else as it is.
Built to cost nothing
A feature that is off loads no code and adds no hooks. SlimPress adds no CSS, JavaScript or markup to your public pages, ever. With every feature off, SlimPress adds about 115 KB of memory and no database queries to a front-end request, and its processing overhead was too small to measure (WordPress 7.1, PHP 8.4, using the median of 40 paired runs).
External services
The performance test tab has an optional “Run Google PageSpeed test” button. When you click it, SlimPress sends your site’s homepage URL to Google’s PageSpeed Insights API ( https://www.googleapis.com/pagespeedonline/v5/runPagespeed ) to retrieve Core Web Vitals for that page, using the test type ( strategy=mobile ) and the category ( category=performance ). No other data is sent, no API key is used, and nothing is sent automatically. Google also receives your server’s IP address and the standard WordPress User-Agent (which includes your site address), as with any web request.
This service is provided by Google: Terms of Service , Privacy Policy .
See it in action
Screenshots & previews.
Overview - what is switched off in each group, with the site-wide presets.A group tab - every switch with its impact badge, what it does and what might break.The performance test - choose pages, run the test and see the difference with and without SlimPress.Test history - earlier runs, per-feature results, the settings each run used, and a trend chart for HTML size, PHP time and queries across runs.SlimPress – Disable Unused Features, Heartbeat & XML-RPC screenshot 5
02 / Source details
Gettingstarted.
01Upload the plugin to /wp-content/plugins/slimpress/ , or install it from the Plugins screen.
02Activate it. Nothing changes on your site until you say so.
03Go to Settings -> SlimPress .
03 / Source details
Frequently asked questions.
Does activating SlimPress change anything on my site?
No. Every feature is off by default and activation writes nothing.
What happens if I deactivate SlimPress?
WordPress returns to its default behaviour on the very next request. SlimPress applies its changes through runtime filters and actions, so there are no core settings to restore. Deleted data does not come back: this includes revisions removed by the “Delete old revisions” button (which asks first) or by a revision limit when a post was saved, trash emptied under a shorter retention period, and WooCommerce scheduled actions and logs deleted under shorter retention limits. Image copies omitted during uploads while a Media switch was on are not recreated.
Which toggles are risky?
Every toggle that can cause a visible problem is marked Careful and explains what might stop working. The ones most likely to cause problems are:
Disable the REST API for logged-out visitors – contact forms, booking plugins and WooCommerce blocks often use it. Add their namespaces to the allowlist.
Disable WP-Cron on page load – scheduled posts, backups and automatic updates stop until a real server cron job runs wp-cron.php . Set that up first.
Disable XML-RPC – the WordPress mobile app, Jetpack and pingbacks use it.
Disable comments site-wide – WooCommerce product reviews are comments too.
Disable global styles – block themes rely on these styles for spacing, colours and typography.
Disable installing and updating from the dashboard – also stops security updates. Use this only on sites that are updated another way.
Disable recovery mode emails – these emails help you regain access after a fatal error.
SlimPress also warns you when an active plugin is known to need something you are about to switch off.
Why doesn’t SlimPress remove ?ver= query strings?
The version string is what makes browsers fetch a fresh file after an update. Removing it offers no measurable benefit and can leave visitors with outdated CSS and JavaScript. SlimPress also has no switch for turning off lazy loading, automatic sizes attributes on lazy-loaded images or big-image scaling, because disabling these features makes sites slower. The Media tab explains big-image scaling on an info card instead.
Does SlimPress need WooCommerce?
No. It works on any site. On a WooCommerce store, it warns you about switches that affect features the shop relies on, and the WooCommerce store preset preserves those features. A WooCommerce tab with its own switches (admin nags, tracking, background jobs and more) appears automatically while WooCommerce is active, and disappears – without losing your choices – if you deactivate it.
Will it conflict with my caching plugin?
SlimPress does not cache, minify or combine anything, so it does not overlap with a caching plugin. The performance test asks for uncached pages, and if a page cache responds anyway, it says so rather than showing you the cache’s numbers.
Does SlimPress contact any external service?
Only if you click the optional PageSpeed button on the performance test tab. See “External services” below.
Can I move my settings to another site?
Yes. The Tools tab exports your settings as a JSON file and imports them on another site. The tab also lets you reset every switch to off.
I changed something and the site broke. How do I go back?
Open Tools -> Undo a change . SlimPress keeps the last 10 versions of its settings – every save, group pause, preset, import and reset – and restores the version you choose. To find the cause first, pause one group at a time from its tab.
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