Minify JS, HTML & CSS

"The best Magento optimizer available. I edit my files as normal and Opti minifies and versions them automatically. No cache flushing required"

Magento 2 Minify JS, HTML & CSS

Speed up Magento automatically with Opti's minification and compression algorithms and make your site faster.

  • Automatically minify your HTML, JavaScript and CSS
  • Give your customers less data to download and make your site faster
  • Minify the Magento Admin content to make your Admin a little faster
  • Requires no extra software or server modules to work
  • Opti now also minifies hardcoded JS and CSS files as well as inline CSS and JS.
  • Automatic refreshing of cached CSS and JS files after you make a change

Minify Js, CSS and HTML in Magento

Making a website faster has always been high on any web developer or site administrator's list of things to do. A faster site means a better customer experience, which brings better profits and these days, a better Google ranking. To help our clients achieve this, we decided to build Opti.

Opti, short for Optimisation (or Optimization if you're from the States) is a light weight Magento extension designed to improve the load time of your website by providing simple but affective optimisation techniques. The extension currently offers CSS minification, HTML minification and JavaScript minification. These techniques are proven to decrease page load times, which will help with your search engine position and server resources.


See screenshots of the extension below. If there are any other screenshots you wish to see, please get in touch.

  • Minify JS, HTML & CSS


There are 33 customer reviews for Minify JS, HTML & CSS.

  • Great and honest support from Ben (which is refreshing). Really recommend this as an extension and also Fishpig as a company, Ben provides excellent committed service.Paul Burdon

  • Easy installation and configuration. With correct set up this will make you pages load faster and keep your customers happy. It's not a magic bullet but if you know about optimising images and can separate the css needed for above-the-fold content this extension makes life a lot easier for you.

    Finally, if you do have any questions or problems I can *guarantee* that Ben will help you as much as he can. This is the second Fishpig extension I have used and would not hesitate to use more in the futureJulian

  • Excellent extension. It really helped reduced page load speed times from around 3.5s down to low 2s. Also pushed up GTMetrix scores. Installed easily for a novice and an initial conflict was quickly looked into and sorted by Ben. Highly recommend the extension and Ben. Cheers, Mike.Mike

  • This is an excellent extension that substantially increased site performance. Was simple to install and configure and received immediate support for an unforeseen conflict that was quickly solved. This is my 6th extension from Fishpig with all properly functioning on version Highly recommend!Tom De Grezia

  • Easy setup, works like a charm!Petra

  • I tried a few different extensions before finding Opti. Some were free some were commercial. None of them were as easy to use and as effective as this one.

    As for the free ones out there, you'll find you'll need to manually click a button in the admin to minify your JS. And on occasion if the JS cache is cleared, you will not get notified that you must again click that button. It's a super hassle that costs you ratings with Google's PageSpeed since Googlebot will not email you and let you know... hey, you were minified before but something happened. Did you forget to click that button?

    As for the commercial options out there, they require you to install Java and/or some other library on your server. I frankly did not have much luck with them. Some of the companies also add a bunch of cruft to your Admin UI. You know what I'm taking about. Some hot yellow link right there in your main Admin navigation that screams for attention every time you enter your Admin. I personally find that very annoying.

    Opti is not like that at all. For one thing, it's tucked away very elegantly in the Admin configuration section. It's plug and play. No real configuration needed. No need to install special libraries on your server.

    Opti is also completely automated. No need to click any buttons periodically to run the optimization. It is designed to always check and optimize if needed.

    Worth also mentioning that Opti will minify JS, CSS, and HTML. Plus, it will move your JS and CSS to the bottom of the page (a process called deferring JS / CSS). Most others will do some of these things, but not all.

    And finally, Opti's algorithm is far better than other extensions I've tried. The minification is very condensed. All superfluous white space / line breaks are removed.

    Great extension and I highly recommend it!Nathan

  • Excellent extension, Flawless implementation.
    A thousand thanks to FishPing for Minify JS, HTML & CSS.

    SIDSiddharth Maheshwari

  • Excellent products. Excellent Developer.

    Opti is plug and play. We use Opti in combination with Bolt & NoBots - really fast Trio :-)

    Thank You Ben!


  • Must have extension which will improve page speed scores.Jag

  • This is my default purchase for ANY Magento site, old or new. Ben's support is legendary and even with this sheer complexity involved with minification, this plugin delivers excellent results.Jeremy SIlva

  • Brilliant service and resultsTony O'Rourke

  • Easy to use and does exactly what it says on the tin!Peter Symonds - Display Wizard

  • Opti just works. Install it, refresh your cache and your files will be at their smallest possible size. You can then sit back and enjoy having a faster site.Jason

  • Works great out of the box.Dave

  • I had a few problems with installation as there was another extension using the same files but Ben helped me and we had everything up and running within an hour. Great service and a very non-intrusive extension.Ricky Banks - Apex Supplies

  • So easy to install - 2 seconds to setup. Pageload time is faster on the frontend AND backend which is so nice.Tom

  • An invisible and invaluable plugin. The source code is compressed and running smoothly. I use Amazon's CloudFront CDN along with Bolt, Opti and SmushIt all work well together.Tim

  • I installed Opti onto my Magento store and was very happy with the results. Ben is also a top bloke - I have fired various questions over to him and he's been very responsive to answers. The "grouping" functionality is very good and I'm steadily going through all of my JS files to try and combine as many as I can.andy

  • I have purchased Opti with Bolt in a bundle. And the only thing I can say - It was the best Investment for my Magento site. The Extension does its job by compressing JavaScript and CSS. Already have plans to invest into more extensions. Thank You Ben !!!Alisher

  • So I installed the extension via FTP. The extension works, my Javascript file was compressed from more than 1000kb to 170kb, nice.Dirk

  • Ben has been the most amazing developer we've ever worked with. He is extremely responsive from beginning to end (even while on vacation!). This extension on top of Bolt has shown some incredible results. The default Magento Minify and Combine JSS/CS are just broken beyond belief (we're on but Opti has done what no other extensions we've tested with can. Ben even went out of his way to work with our CDN to implement MaxCDN solutions to work with Opti. He really goes above and beyond with customer service.

    Honestly, just buy it, see what it does to your site and you'll be a believer. You can our site at to see the results for yourself.Sean Li

  • With Magento being extremely dependent on a slew of JavaScript files, Opti is a godsend! We'd tried Minifying and merging JS file before, but always seemed to run into issues with functionality breaking. Opti worked immediately, combining and minifying files perfectly. Highly recommended!Andrew

  • Using Opti to minify and combine .js and .css files, which reduces pages load time. Opti worked right out of the box without conflicts and special configuration with many other Magento extensions installed in the store. Had some questions about its functions and author quickly answered to them. Also I recommend this extension because it includes free updates for life!Alex

  • Bought Opti while purchasing Bolt. Not quite sure if we needed it but have worked with Ben and Fishpig several times before and have always been pleased with their solutions and service. Wanted to be able to address our site speed with one vendor. Site noticeably faster with Bolt/Opti extensions.Nick

  • I am using OPTI as well as BOLT, and both these plugins have increased the speed of our website tremendously. The performance of this plugin is incredible, and FIshpig has the best support!Shawn J

  • I'm using Opti in combination with FishPig's other extensions Bolt and The combination of these three extensions has dramatically increased my site speed and usability. FIshPig has been great to work with also and very responsive to any questions.Dan F

  • I love minify code and never get an extension to do this well. Opti is easy to use and install and makes a difference for me. My site is faster and it only took 5 mins to make it soabe

  • After requesting dynamic block caching, Ben kindly added this in for me. I prefer this to full page caching as it means I can only cache the blocks that affect performance and still include dynamic blocks on every page.

    The extension was easy to install and my site was noticeably faster instantly,Mark

  • Simple extension but great results. Thanks piggy!Mo

  • We supply hard wood flooring at (-link-removed-) and stock 1000's of different floor styles. This extension allowed us to keep growing our site without increasing our server resources and was easy to install.WoodFloors!

  • This fabulous extension has improved my site's response time and decreased page load time by a factor of 3!

    This will have a great affect on my conversaion rate and organic search engine positioningJon S Lewis

  • opti is nice and easy to install and my site is fasterrasmus

  • Another useful extension from Fishpig that does exactly what it says on the tin! My site is on shared hosting and was thinking of moving to a VPS but now I dont have toSteven

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Version Info

The latest version of Minify JS, HTML & CSS for Magento 1 is