# Minify css/js
**URL:** https://forums.concretecms.org/t/minify-css-js/10057
**Category:** Developing with Concrete
**Created:** [September 23, 2026, 9:25am UTC](https://forums.concretecms.org/t/minify-css-js/10057 "2026-09-23T09:25:10Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@SK\_Plan](https://forums.concretecms.org/u/SK_Plan)
#### Post date: [September 23, 2026, 9:25am UTC](https://forums.concretecms.org/t/minify-css-js/10057/1 "2026-09-23T09:25:10Z")
In Optimization, CSS and JavaScript Post-Processing, I choose “On” to minify and combine assets loaded via registerAssets in page\_theme. ccm v.9.5.4, php 8.5
It combines but does **not minify** as it describes above.
Anything I haven’t seen? Something in the caches?
Thanks for insight.
Chris
---
### Author:  [@Vuish](https://forums.concretecms.org/u/Vuish)
#### Post date: [September 23, 2026, 12:27pm UTC](https://forums.concretecms.org/t/minify-css-js/10057/2 "2026-09-23T12:27:27Z")
I think the minification has been removed from Concrete CMS. Even though it throws no error it does not minify anymore.
Source: [Add-On Developers: Get Your Add-Ons Ready for Concrete CMS 9.0 :: Concrete CMS](https://documentation.concretecms.org/tutorials/add-developers-get-your-add-ons-ready-concrete-cms-90)
_In v9 the ‘minify’ and the ‘combine’ options were removed._
_Keeping them in your code won’t hurt anything but it will also not do anything. You then have 4 things to keep in mind:_
_If your code should be backward compatible leave these options in place
If your code is for v9 only just remove these options
If it’s important for your project, start providing already minified and possibly combined assets yourself
If your code makes independent use of the minifier class that was included in the core, find an alternative as it was also removed_
---
### Author:  [@BT\_AV](https://forums.concretecms.org/u/BT_AV)
#### Post date: [September 24, 2026, 8:47am UTC](https://forums.concretecms.org/t/minify-css-js/10057/3 "2026-09-24T08:47:36Z")
It’s a little confusing:
The CCM Interface in /Dashboard/Optimization; CSS and JavaScript Post-Processing: The description is still saying “minify” available.
The concrete tutorial 2021 is also not correct, “combining” is not removed, **v.9.5.4** still combines.
---
### Author:  [@JohntheFish](https://forums.concretecms.org/u/JohntheFish)
#### Post date: [September 24, 2026, 9:14am UTC](https://forums.concretecms.org/t/minify-css-js/10057/4 "2026-09-24T09:14:23Z")
First v9.0, combining was removed, as was the LESS compiler, because the core and Atomik were now SASS over Bedrock and groups of assets had become larger features. But that broke back compatibility too badly, many developers complained, so enough (but not all) of it was put back in.
---
### Author:  [@BT\_AV](https://forums.concretecms.org/u/BT_AV)
#### Post date: [September 24, 2026, 4:50pm UTC](https://forums.concretecms.org/t/minify-css-js/10057/5 "2026-09-24T16:50:27Z")
Thanks for clarification. So just the help-block text should read:
_Combines assets while loading pages to reduce web server requests. May slow initial page request time. Most sites can safely leave this disabled._
---
### Author:  [@SK\_Plan](https://forums.concretecms.org/u/SK_Plan)
#### Post date: [September 25, 2026, 8:21am UTC](https://forums.concretecms.org/t/minify-css-js/10057/6 "2026-09-25T08:21:43Z")
Great, everybody thank you. Glad to know.