Forty server-level optimisation filters for HTML, CSS, JavaScript, and images. Built into every 365i hosting plan. No plugins to install, no code to write, no monthly fees. Toggle what you need from your control panel.
365i’s Web Optimisation panel sits inside StackCP, the same control panel you use for files, email, and DNS. It applies platform-level rewriting to your site’s HTML, CSS, JavaScript, and images before responses leave the server. Combine it with the global CDN and you have two layers of free performance work that customers on most other hosts pay plugins to do badly. The panel covers forty optimisations grouped into four categories, each with a Low / Medium / High risk grade so you know what is safe to enable site-wide and what needs careful evaluation first.
Optimisation that runs on the server, before anything reaches the browser, is faster, more reliable, and conflicts with nothing. Here is what you get on a 365i hosting plan that you will not get with a stack of WordPress plugins.
Rewriting at the edge means fewer bytes, fewer round trips, and no PHP interpreter overhead between request and response. The work happens before WordPress even loads.
LCP, CLS, and INP all benefit. Image dimension insertion alone fixes most CLS issues. Critical CSS prioritisation moves LCP into the "Good" band on real WordPress sites.
Every 100 ms shaved off page load measurably lifts conversion rate. Faster sites get further down the funnel before the visitor loses patience.
Optimisation plugins add their own JavaScript, their own admin overhead, and their own update churn. The panel adds none. It is the platform.
The panel ships with sensible defaults and lets you save your settings as a template to apply across every site you manage. Not sure what to enable? Try the wizard.
Activates every safe filter with recommended defaults. Run it once on a new site, then fine-tune from the toggles. Most WordPress sites can stay on the wizard’s output without further intervention.
Save your current settings as a named template, then apply that template to your other sites in seconds. Indispensable if you run more than a handful of sites and want consistent performance defaults.
Every toggle is graded Low, Medium, or High Risk so you can see at a glance what is safe site-wide and what needs testing. Low Risk is safe for nearly all WordPress sites. High Risk demands evaluation.
A single switch that applies the most popular Low Risk filters in one go. Good for the "just make it faster, I do not want to think about it" case. Toggle off any time.
Pick a category. Flick a toggle to see what it does. Filter by risk to see only what is safe site-wide. This is the same panel you get on every 365i hosting plan, with the same wording the platform uses.
Server-level HTML rewriting that runs at the edge before responses leave 365i's infrastructure. The platform parses every HTML response, applies the filters you have activated, then serves the rewritten result to visitors. No PHP overhead, no plugin conflicts, no theme changes.
CSS rewriting and prioritisation at the edge. Combines stylesheets, inlines critical rules, defers the rest. Reduces the number of HTTP round trips a browser needs before it can paint the page.
JavaScript rewriting at the edge. Combines, defers, minifies. Use selectively. JavaScript transformations can interact unpredictably with WordPress plugins, so risk levels matter here more than anywhere else.
Image rewriting at the edge. WebP conversion, recompression, dimension insertion, lazy loading, responsive variants, and sprite generation. The biggest LCP wins on most WordPress sites come from this category.
Adds a head to the document if it encounters a <body> tag before finding a <head> tag.
Reduces the transfer size of HTML files by replacing contiguous whitespace with a single whitespace character.
Attempts to combine multiple <head> tags into one.
Adds a response header that matches each meta tag with an http-equiv attribute.
Reduces the transfer size of HTML files by removing attributes from tags when the specified value is equal to the default value for that attribute.
A version of Extend Cache that acts on PDFs. Unlike "Extend Cache" it applies not only to resources but also to hyperlinks.
Seeks to improve the cacheability of a web page's resources without compromising the ability of site owners to change the resources and have those changes propagate to users' browsers.
Provides hints to the browser at the beginning of the HTML, which allows the browser to pre-resolve DNS for resources on the page.
Eliminates HTML comments, which are often used to document the code or to comment out experiments.
Eliminates unnecessary quotation marks from HTML attributes.
Trims URLs by resolving them by making them relative to the base URL for the page.
Seeks to reduce the number of HTTP requests made by a browser during page refresh by replacing multiple distinct CSS files with a single CSS file.
Parses linked and inline CSS, rewrites the images found and minifies the CSS.
Reduces the number of HTTP round trips by combining multiple CSS resources into one.
Reduces the number of requests made by a web page by inserting the contents of small external CSS resources directly into the HTML document. This can reduce the time it takes to display content to the user, especially in older browsers.
Seeks to reduce the number of times the browser must re-flow the document by ensuring that the CSS styles are all parsed in the head, before any body elements are introduced.
Improves page render times by identifying CSS rules needed to render the page, inlining those critical rules and deferring the load of the full CSS.
Parses linked and inline CSS, rewrites the images found and minifies the CSS.
Rewrite CSS-inline style attributes that contain URLs, for example background-images can be targeted using this filter.
Identifies popular JavaScript libraries that can be replaced with ones hosted for free by a JS library hosting service (the default is Google Hosted Libraries).
Seeks to reduce the number of HTTP requests made by a browser during page refresh by replacing multiple distinct JavaScript files with a single one.
Defer JavaScript until after the page loads to avoid render blocking.
Source maps that lets all browsers how to map between a minified JavaScript file and the original, readable version so that you can see the readable version while debugging minified production code.
Reduces the number of requests made by a web page by inserting the contents of small external JavaScript resources directly into the HTML document. This can reduce the time it takes to display content to the user, especially in older browsers.
Seeks to make sure scripts do not block the loading of CSS resources.
Rewrites JavaScript files to remove excess whitespace and comments. In OptimizeForBandwidth mode, the minification occurs in place without changing URLs.
Converts animated images to WEBP animated images.
Converts any images to WEBP lossless.
Reduce the transfer size of HTML files by eliminating redundant image data URLs.
Replaces references to small images by converting them to inline data: URLs, eliminating the need to initiate new connections for fetching the image data.
Generates low quality versions of the images that are inlined in the HTML page. Users experience faster rendering of the page and the low quality images are replaced by high quality versions after an onload event is triggered.
Adds width= and height= attributes to the <img> tags if they are missing. Values for the width and height attributes are computed from the image.
Optimize browser rendering and reduce number of HTTP round-trips by deferring the loading of images which are not in the client's viewport.
Recompresses images, removing excess metadata and transforming gifs into pngs.
Shrinks the dimensions of an image to the width= or height= attribute specified in the <img> tag or in the inline style= attribute.
Requires: Insert Image DimensionsShrinks images to their rendered dimensions on the web page.
Requires: Insert Image DimensionsShrinks images to their fit-rendered dimensions on the web page. Unlike resize_images, it ignores any width and height attributes specified for the image.
Requires: Resize ImagesMakes images responsive by adding srcset attributes which provide multiple versions for different pixel density screens.
Requires: Resize ImagesPerforms common image optimizations, including recompression, transcoding to optimized formats, reduction of image dimensions, and inlining of small images into HTML or CSS.
Detects GIF and PNG images used as backgrounds in CSS, and combines all such images referenced from a CSS file into a single large image. The individual CSS backgrounds are then rewritten to point to the single large image.
WordPress optimisation plugins (WP Rocket, Perfmatters, W3 Total Cache, Autoptimize) cover similar ground but at the wrong layer. Manual optimisation works but does not scale. The panel does most of what plugins do, with no PHP overhead and no admin churn.
| Capability | 365i Web Optimisation Panel | WordPress Optimisation Plugins | Manual / DIY |
|---|---|---|---|
| HTML rewriting (whitespace, comments, attributes) | Some | Possible | |
| CSS combination and critical-CSS extraction | Possible | ||
| JavaScript defer and minification | Possible | ||
| Image WebP conversion at the edge | Some | ||
| Image lazy loading | Possible | ||
| Image dimension insertion (CLS fix) | Some | Possible | |
| Responsive srcset generation | Some | Possible | |
| Runs at the edge, before WordPress loads | |||
| No PHP overhead per request | Yes | ||
| No plugin updates to maintain | Yes | ||
| Profiles applied across multiple sites | Some | ||
| Risk-graded toggles | |||
| Cost | Free | £40-£120/yr | Time |
“Some” means the feature is available in some plugins but not all, or only in paid tiers.
Tuning the panel is trial and error. Every theme and plugin combination is different, so there is no single set of toggles that fits every site. Our walkthrough How We Hit 97 Mobile PageSpeed shows the exact layered stack we used on a real site, with the actual settings that delivered the score. Start there, measure with PageSpeed Insights, and our 7-day support team can answer specific questions as you iterate. Per-site tuning by hand is a paid consultancy job, not part of free hosting support.
A dedicated team of UK-based hosting specialists who understand server administration, WordPress, DNS, email, and everything in between.
Available every day of the week including evenings, weekends, and bank holidays. Data centre monitoring is 24/7, so your server is always watched.
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Thanks Johnny! Great to have you with us!
365i has dramatically speeded up our wordpress website which was beyond dlow! Great service from people who seem to genuinely care about their customers. Thanks so much. N
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Common questions about server-level optimisation, plugin compatibility, and what is included on each plan.
For caching, no. The 365i platform includes server-level page caching at the edge, so a WordPress caching plugin like WP Rocket or W3 Total Cache duplicates work the platform already does. For page-specific tweaks (preloading critical assets, font display: swap, JavaScript exclusion rules for known plugin conflicts) a lighter optimisation plugin like Perfmatters can complement the panel rather than replace it. We never recommend running two layers that do the same job.
The CDN delivers your content from edge servers worldwide. The Web Optimisation panel rewrites your content before it leaves the server. They work together: the panel produces a smaller, faster, more cacheable response, and the CDN serves that response from the closest edge to each visitor. Both are free on every 365i hosting plan and both are configured from the same StackCP control panel.
Low Risk filters are safe for the vast majority of WordPress sites and themes. Medium Risk filters work for most sites but interact unpredictably with certain page builders and complex JavaScript. High Risk filters need testing on a staging copy before going live. The risk grade on every toggle is the panel's own assessment from real-world deployment data, and if anything does break the toggle reverses in one click.
Yes. Every 365i hosting plan includes the panel. Turbo adds 4.20 GHz compute, NVMe storage, 5 GB MySQL, and CDN pre-caching on top of what every other plan gets. The panel is identical across plans because it runs at the platform layer above the per-package compute.
Yes. The Profiles feature lets you save your current panel configuration as a named template and apply it to any other site on your account. Useful when you have a set of toggles that work well for your typical WordPress build and you want every new client site to start from the same baseline rather than reconfigured by hand.
No. The panel runs at the edge for public requests. Admin requests bypass the optimisation layer because rewriting the WordPress dashboard would interfere with editing tools, the Gutenberg block editor, and plugin admin screens. You get the speed boost where visitors see it and the unmodified admin experience where you do not.
Run the Optimisation Wizard. It activates every Low Risk filter with platform-recommended defaults and is safe for nearly all WordPress sites. After that, tuning is trial and error: enable a filter, measure with PageSpeed Insights, keep what helped, back out what hurt. Every theme and plugin combination is different, so there is no single config that fits every site. Our walkthrough How We Hit 97 Mobile PageSpeed on Managed WordPress Hosting shows the exact layered approach we used on a real site, with screenshots of which toggles to flip. Our support team can suggest sensible starting points and explain what individual filters do, but per-site tuning by hand is a paid consultancy job rather than part of free hosting support.
Available on every plan. WordPress Hosting, Web Hosting, Agency Hosting, Turbo Hosting, and Managed Cloud Servers. The panel is part of the platform, so any site running on 365i infrastructure can use it regardless of whether it is WordPress, Joomla, custom PHP, or a static site.
Every 365i hosting plan includes the Web Optimisation panel, the global CDN, and PHP 8.5. Run the Wizard, enable Low Risk, measure, iterate. Plans from £5.99/mo.
