Your slow store is losing you sales every day

Plug In Speed is a Shopify app that reduces your stores page load times by automatically compressing images and minifying CSS and JavaScript. It connects directly to your Shopify store — no theme editing required — and works in the background to keep every image optimised and every page as lean as possible. A built-in dashboard tracks your load time and image size improvements so you can see the results in real numbers.

Not with the right settings. Plug In Speed offers both lossy and lossless compression. Lossless compression reduces file size without any change to image data — the result is pixel-identical to the original. Lossy compression achieves larger size reductions with minimal visible quality loss at standard settings. You control which mode is used, and the built-in before/after comparison tool lets you inspect the result before committing. All originals are backed up for 30 days so you can always restore them.

Minification removes everything from your code files that the browser doesnt need to run them — whitespace, line breaks, and developer comments. This reduces file sizes, which means faster downloads. JavaScript inlining goes a step further: instead of the browser making separate download requests for each script file, those scripts are embedded directly into the page. Fewer requests means a faster perceived load, especially on mobile connections where each request adds latency.

Yes, in most cases. Core Web Vitals measure three things: Largest Contentful Paint (LCP — how fast the main content loads), Cumulative Layout Shift (CLS — visual stability), and Interaction to Next Paint (INP — responsiveness). Image compression directly improves LCP by making the largest image on the page load faster. JavaScript optimization improves INP by reducing script execution time. These are typically the two biggest contributors to a poor Core Web Vitals score on Shopify stores.

Yes — Plug In Speed is designed to be safe by default. For images, every original is backed up for 30 days, so you can restore any image in one click if youre unhappy with the result. For code optimization, if you notice any visual issue on your theme after enabling minification, you can turn it off instantly from the app dashboard — no theme edits needed. The app does not modify your theme files directly, so theres no risk of permanent changes.

Yes. Plug In Speed works with all Shopify themes — free themes, premium themes, and custom-built themes. Image compression is theme-independent (it optimises the image files themselves). Code optimization works at the asset level and is compatible with standard Shopify theme architecture. If you ever encounter a conflict with a specific theme or third-party app, support is available to help resolve it.

When Plug In Speed compresses an image, it saves a copy of the original before making any changes. This backup is kept for 30 days, during which you can restore the original at any time with a single click. After 30 days, the backup is removed to keep storage clean. This means you can optimize with confidence — if you ever decide a compressed image doesnt look right, restoring it is instant.

Image compression improvements are immediate — as soon as an image is optimised, pages that include it load faster. For existing images, you can bulk-optimize your full library in one session. Code minification is also immediate once enabled. Youll see the impact in your Plug In Speed dashboard within hours, and in Google PageSpeed Insights and your Core Web Vitals report within a few days as Google re-evaluates your pages.

Yes — directly. Google made Core Web Vitals an official ranking signal in 2021. Pages with poor speed scores receive a ranking disadvantage compared to faster competitors with similar content. Beyond rankings, speed affects user behaviour: Google Research shows 53% of mobile visitors leave if a page takes more than 3 seconds to load — thats lost traffic your SEO work already earned. A faster store captures more of that traffic and converts more of it.

Yes. Plug In Speed offers a free trial — no credit card required to get started. You can install the app, optimize your images and code, and see real improvements in your load times before committing to a plan. All billing is handled through Shopify, so you can cancel any time directly from your Shopify admin with no lock-in or penalties.