AMP has many limitations for CSS - it needs to be inlined, cannot exceed 50KB and cannot include !important, filter, nor JavaScript. Which CSS frameworks can be safely used with AMP?

5 Answers 5


This is a community wiki, you can expand it if you have something to add.

These CSS-only frameworks are compatible with AMP (sorted by size):

In order to use one of them in an AMP HTML page, get the minified CSS file, remove any !important or filter if they exist, paste the inlined CSS code into <style amp-custom> inside <head> and replace any <img> with <amp-img> inside <body>.

  • Which of these are AMP compatible without any changes? Removing !important is going to break lots of these.
    – DD.
    May 4, 2018 at 8:21
  • 1
    @DD These are: AMP Spectre, AMP Surface, AMP MUI.
    – niutech
    May 6, 2018 at 17:14
  • 1
    @DD Also AMP Start.
    – niutech
    May 6, 2018 at 17:20

I've created and released one called 1bx.uk that you can see here... https://1bx.uk

It's well documented and built specifically for AMP.

As we use it in our business, it will be well supported

  • This site can’t be reached 1bx.uk’s server IP address could not be found. DNS_PROBE_FINISHED_NXDOMAIN
    – Jay
    Dec 17, 2019 at 19:40

This framework is individually adaptable.



Amp CSS Framework is based on Bootstrap.

See here: https://ampcssframework.com


Maybe missing: http://basscss.com/v7/docs/guides/ui/

or as scss


.. yes it not so active but might be interesting, the syntax seems short and simple, also independently reusable components


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