File Optimizer

File Optimizer

by Speed Boostr

Minify CSS, JavaScript, and Liquid files.

4.5 of 5 stars(8 reviews)

Minify your files with ease

Reduce the size of your JavaScript, Liquid, and CSS asset files for improved site performance.

No dev experience required

Anybody can minify their files with the press of a button.

Revert your changes any time

You can revert your minified files to make edits or fixes before minifying them again.

About File Optimizer

About File Optimizer

File Optimizer gives you the opportunity to optimize the theme assets of your store without any developer experience or knowledge required.

Who is this app for?

  • If you want to minify CSS, JS, or Liquid files
  • If you're getting warnings in various analysis tools for unminified files
  • If you want a quick and easy way to minify theme assets

How it works

Visit the File Optimizer app, choose the theme that you'd like to minify files in, and click on the "Minify" button.

If you need to revert your changes cause you're making edits OR your site doesn't work due to the minifications, press "Revert".

Our app can only minify local files within your theme's assets. If you're looking for ways to minify 3rd party application files and scripts, you'll have to contact your app developers to help with that.

Free installation

The app has a free trial that allows you to minify one file for free.

If you need help installing the app or making it work, contact us! We've got you covered.

Liquid Minification

Liquid JavaScript files have long been an issue for minification. Our File Optimizer is able to minify your Liquid files without breaking their functionality.

Rockstar Support

We're a team of Shopify developers with experience building apps and customizing themes. If you ever need help, give us a shout!

Media gallery



Free to install

$24.99 one-time fee to upgrade to Unlimited access

4.5 of 5 stars

The overall rating reflects the current state of the app. It accounts for all app reviews but prioritizes the most recent ones.
  • 5 of 5 stars
    88% of ratings are 5 stars
  • 4 of 5 stars
    0% of ratings are 4 stars
  • 3 of 5 stars
    0% of ratings are 3 stars
  • 2 of 5 stars
    0% of ratings are 2 stars
  • 1 of 5 stars
    13% of ratings are 1 stars

Most recent reviews


Great app and very helpful team! Chris even helped fix an issue which appears to have been unrelated!

Developer reply

April 7, 2021

Thanks for the review! Really appreciate the kind words and love working with you. Feel free to ping us if you have any feedback or ideas that you'd like for us to try! 👍

The Fashion Gift Shop

What an amazing app, so easy to install and work with. Support is very responsive and the app as saved me on file sizes and our site now load much much faster. I can not recommend this app enough, it's truly a must-have app.

Developer reply

March 15, 2021

Thank you so much for the kind words! I'm happy that our app was able to help you and your site. Don't hesitate to let me know if there's anything you need help with or any feedback that you'd like to share! 🙌

Sunday Forever

The app helped to optimize files which definitely increased web speed. Now I'm going to work with them to help get rid of unused css and javascript from my site!

Developer reply

March 12, 2021

Glad to hear it worked well for you and thanks for the kind words! Looking forward to continuing our work together!