Inline ‑ Critical CSS

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Eliminate render-blocking resources and speed up your store by inline your Critical CSS.

What Owlfred thinks...

By using Inline ‑ Critical CSS, you can speed up your store's loading time and improve user experience.

This is a great Shopify app that will help you grow your Shopify store faster!

Last Updated:
July 10, 2024

Speed up your store with inline Critical CSS.

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Unlock the potential of your Shopify site with an ingenious app tailored to improve site performance exponentially. Breathe life into your site with an optimum loading speed, offering a seamless browsing experience with base styling delivered at lightning speed. The secret lies within a unique style element housed within the document's head, abolishing the need for extra server requests and eradicating wait for style loading and rendering.

Furthermore, reap the benefits of advanced prioritization of CSS. The app takes an intelligent approach to managing the way your site's CSS is loaded. As soon as a visitor lands on your page, the essential styling is instantaneously available, while the less pertinent, below-the-fold CSS, is quietly loading in the background. This foresight ensures that all styling effortlessly integrates without causing any render-blocking, keeping your site perpetually smooth and visually perfect.

All of this is achieved without requesting any additional resources or causing any unnecessary extra load on your server. This resource-savvy app has been meticulously designed to greatly reduce server burden and increase the overall loading speed and operational efficiency of your Shopify site. Expect improved conversions and increased customer satisfaction with a multi-tasking app that offers an unparalleled shopping experience.


Unlock the potential of your Shopify site with lightning-fast loading speeds
Prioritize essential styling for instant availability and seamless browsing experience
Reduce server burden and increase operational efficiency for improved conversions
Improve user experience by eliminating style loading wait times
Effortlessly integrate styling without causing render-blocking


Increase website loading speed exponentially
Prioritize essential styling for instant availability and seamless browsing experience
Reduce server burden and increase operational efficiency for improved conversions

About the Vendor

Speed Boostr
12 Jaycee Drive, West Hazleton, PA, 18202, US
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$10 one-time charge
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Owlfred Review

Owlfred here, with a fresh insight on 'Inline - Critical CSS', a speed optimization app brought to you by Speed Boostr. This app means business when it comes to getting rid of any render-blocking resources. Its primary feature focuses on inlining your Critical CSS, delivering the base styling to your visitors ASAP, cutting down the extras and saving precious load time by removing additional server requests and waiting periods. It works like a charm, especially for first timers, making your website load faster and potentially ramping up your conversion rates. With quicker load times, you also stand a bright chance to rank higher on Google. That said, the app sports a humble average of 2.6 stars out of 5 based on 10 reviews, which signals there may be mixed reactions about the app's performance or effectiveness. At $10 as a one-time charge, it's a cost-effective solution if you're looking to streamline your Shopify store's speed. Be sure to weigh the pros and cons as shared by our merchant community before diving in.

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Frequently Asked Questions

How does Critical CSS improve site speed?
Critical CSS improves site speed by prioritizing the loading of CSS that affects above-the-fold content. This means visible content initially loads more quickly, creating the impression of a faster site.
What is the difference between critical and non-critical CSS?
Critical CSS is the minimal amount of blocking CSS required to render above-the-fold content. Non-critical CSS is any extra CSS that can be loaded later without affecting the initial rendering speed.
How do I use Inline - Critical CSS app for speed optimization?
To use Inline - Critical CSS for speed optimization, install the app and it will automatically generate and inline the critical CSS for you, improving your Shopify store's load time.
Is Inline - Critical CSS compatible with all themes?
Inline - Critical CSS is designed to work with a majority of themes. However, exceptions can sometimes occur due to the unique design or features of certain themes. For those cases, getting in touch with the support team can help resolve any issues.

Shopify App Comparison: Inline ‑ Critical CSS vs Speedster Page Speed Optimizer - which is better?

When comparing Inline - Critical CSS and Speedster Page Speed Optimizer, it's clear that both apps focus on improving website loading speed and providing a seamless browsing experience. However, Inline takes a unique approach by housing a style element within the document's head, eliminating the need for extra server requests and drastically reducing the wait for style loading and rendering. This app also prioritizes CSS, ensuring that essential styling is instantly available to visitors while less pertinent CSS quietly loads in the background. This intelligent management prevents render-blocking and keeps the site visually perfect. Inline also impressively achieves all of this without requesting additional resources or causing extra load on the server, ultimately increasing the overall efficiency of the Shopify site.

On the other hand, Speedster Page Speed Optimizer offers a no-code installation process and implements behind-the-scenes technical enhancements effortlessly, enhancing efficiency and professionalism without requiring user intervention. This app focuses on making pages load almost instantly, even on slower connections or older devices. By consistently delighting customers with rapid and smooth browsing experiences, Speedster aims to reduce bounce rates and increase conversion probabilities. Additionally, it ensures lightning-fast page loading times from the storefront to checkout, boosting sales. Although both apps have similar goals, Speedster focuses more on optimizing page speed and improving the customer experience throughout the entire e-commerce operation.

Based on our evaluation, we recommend both Inline - Critical CSS and Speedster Page Speed Optimizer. If you're looking for a unique approach that eliminates extra server requests and prioritizes CSS to create a visually perfect site, Inline is the way to go. On the other hand, if you prioritize easy installation and behind-the-scenes enhancements to achieve lightning-fast page loading times and increase sales, Speedster is the ideal choice. Ultimately, the decision depends on your specific needs and preferences as a Shopify user.

Inline ‑ Critical CSS Shopify AppInline ‑ Critical CSS
Speedster Page Speed Optimizer Shopify AppSpeedster Page Speed Optimizer
Average Rating 2.7 out of 5 4.6 out of 5
Number of Reviews 10 95
Estimated Installs 0 1195
Min Price $0.00 $0.00
Max Price $0.00 $19.95
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