Skip to content
    Moz logo Menu open Menu close
    • Products
      • Moz Pro
      • Moz Pro Home
      • Moz Local
      • Moz Local Home
      • STAT
      • Moz API
      • Moz API Home
      • Compare SEO Products
      • Moz Data
    • Free SEO Tools
      • Domain Analysis
      • Keyword Explorer
      • Link Explorer
      • Competitive Research
      • MozBar
      • More Free SEO Tools
    • Learn SEO
      • Beginner's Guide to SEO
      • SEO Learning Center
      • Moz Academy
      • MozCon
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Digital Marketers
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • The Moz Story
      • New Releases
    • Log in
    • Log out
    • Products
      • Moz Pro

        Your all-in-one suite of SEO essentials.

      • Moz Local

        Raise your local SEO visibility with complete local SEO management.

      • STAT

        SERP tracking and analytics for enterprise SEO experts.

      • Moz API

        Power your SEO with our index of over 44 trillion links.

      • Compare SEO Products

        See which Moz SEO solution best meets your business needs.

      • Moz Data

        Power your SEO strategy & AI models with custom data solutions.

      Save 36% now!
      Moz Pro

      Save 36% now!

      Sign up
    • Free SEO Tools
      • Domain Analysis

        Get top competitive SEO metrics like DA, top pages and more.

      • Keyword Explorer

        Find traffic-driving keywords with our 1.25 billion+ keyword index.

      • Link Explorer

        Explore over 40 trillion links for powerful backlink data.

      • Competitive Research

        Uncover valuable insights on your organic search competitors.

      • MozBar

        See top SEO metrics for free as you browse the web.

      • More Free SEO Tools

        Explore all the free SEO tools Moz has to offer.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • Learn SEO
      • Beginner's Guide to SEO

        The #1 most popular introduction to SEO, trusted by millions.

      • SEO Learning Center

        Broaden your knowledge with SEO resources for all skill levels.

      • On-Demand Webinars

        Learn modern SEO best practices from industry experts.

      • How-To Guides

        Step-by-step guides to search success from the authority on SEO.

      • Moz Academy

        Upskill and get certified with on-demand courses & certifications.

      • MozCon

        Save on Early Bird tickets and join us in London or New York City

      Access 20 years of data with flexible pricing
      Moz API

      Access 20 years of data with flexible pricing

      Find your plan
    • Blog
    • Why Moz
      • Digital Marketers

        Simplify SEO tasks to save time and grow your traffic.

      • Small Business Solutions

        Uncover insights to make smarter marketing decisions in less time.

      • Agency Solutions

        Earn & keep valuable clients with unparalleled data & insights.

      • Enterprise Solutions

        Gain a competitive edge in the ever-changing world of search.

      • The Moz Story

        Moz was the first & remains the most trusted SEO company.

      • New Releases

        Get the scoop on the latest and greatest from Moz.

      Surface actionable competitive intel
      New Feature

      Surface actionable competitive intel

      Learn More
    • Log in
      • Moz Pro
      • Moz Local
      • Moz Local Dashboard
      • Moz API
      • Moz API Dashboard
      • Moz Academy
    • Avatar
      • Moz Home
      • Notifications
      • Account & Billing
      • Manage Users
      • Community Profile
      • My Q&A
      • My Videos
      • Log Out

    The Moz Q&A Forum

    • Forum
    • Questions
    • Users
    • Ask the Community

    Welcome to the Q&A Forum

    Browse the forum for helpful insights and fresh discussions about all things SEO.

    1. Home
    2. Digital Marketing
    3. Web Design
    4. Can anyone recommend a tool that will identify unused and duplicate CSS across an entire site?

    Moz Q&A is closed.

    After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.

    Can anyone recommend a tool that will identify unused and duplicate CSS across an entire site?

    Web Design
    4
    6
    3560
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as question
    Log in to reply
    This topic has been deleted. Only users with question management privileges can see it.
    • danatanseo
      danatanseo last edited by

      Hi all,

      So far I have found this one: http://unused-css.com/   It looks like it identifies unused, but perhaps not duplicates? It also has a 5,000 page limit and our site is 8,000+ pages....so we really need something that can handle a site larger than their limit.

      I do have Screaming Frog. Is there a way to use Screaming Frog to locate unused and duplicate CSS?

      Any recommendations and/or tips would be great. I am also aware of the Firefix extensions, but to my knowledge they will only do one page at a time?

      Thanks!

      1 Reply Last reply Reply Quote 0
      • danatanseo
        danatanseo @danatanseo last edited by

        I read your post at Mstoic Hemant and noticed your comment about Firefox 10. Since I couldn't get Dust-Me Spider to work in my current version of Firefox I tried downloading and installing the older version 10 as you suggested. When I did so, I received the message that the Dust-Me Spider was not compatible with this version of Firefox and it was disabled.

        We are considering purchasing the paid version of Unused CSS (http://unused-css.com/pricing) - Do you have any experience using the upgraded version? Does it deliver what it promises?

        Thanks!

        1 Reply Last reply Reply Quote 0
        • danatanseo
          danatanseo @mstoic last edited by

          Hi Hemant,

          I tried using Dust-Me in Firefox, but for some reason it won't work on this sitemap:  http://www.ccisolutions.com/rssfeeds/CCISolutions.xml

          Could it be that this sitemap is too large? I even tried setting up a local folder to store the data, but everytime I try the spider I get the message "The sitemap has no links."

          I am using Firefox 27.0.1

          danatanseo 1 Reply Last reply Reply Quote 0
          • Christy-Correll
            Christy-Correll Staff last edited by

            Hi Dana, did either of these responses help? What did you end up settling on? We'd love an update! Thanks.

            Christy

            1 Reply Last reply Reply Quote 0
            • mstoic
              mstoic last edited by

              I have an article on that here. An extension for firefox called Dust-Me selectors can help you identify unused CSS on multiple pages. It tracks all the pages you visit of a website and tracks classes and ids which were never used. Moreover, you can also give it a sitemap and it will figure out the CSS which was never used.

              danatanseo 1 Reply Last reply Reply Quote 1
              • Travis_Bailey
                Travis_Bailey last edited by

                This sounds like it might just do the trick. You'll need to have Ruby installed for it to work. If you have a Mac, it's already on there. If you have a Windows you'll need this. It's pretty easy, I installed Ruby on my Windows gaming rig. If you're running a Linux flavor, try this.

                Just take your URLs from the site crawl and make a txt file. You can compare that with your CSS file. I've never tried it on a large site, let me know how it goes for you.

                1 Reply Last reply Reply Quote 1
                • 1 / 1
                • First post
                  Last post

                Got a burning SEO question?

                Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.


                Start my free trial


                Browse Questions

                Explore more categories

                • Moz Tools

                  Chat with the community about the Moz tools.

                • SEO Tactics

                  Discuss the SEO process with fellow marketers

                • Community

                  Discuss industry events, jobs, and news!

                • Digital Marketing

                  Chat about tactics outside of SEO

                • Research & Trends

                  Dive into research and trends in the search industry.

                • Support

                  Connect on product support and feature requests.

                • See all categories

                Related Questions

                • Dan-Louis

                  How to fix non-crawlable pages affected by CSS modals?

                  I stumbled across something new when doing a site audit in SEMRUSH today ---> Modals. The case: Several pages could not be crawled because of (modal:) in the URL. What I know: "A modal is a dialog box/popup window that is displayed on top of the current page" based on CSS and JS. What I don't know: How to prevent crawlers from finding them.

                  Web Design | | Dan-Louis
                  0
                • Sam.at.Moz

                  Hiding content until user scrolls - Will Google penalize me?

                  I've used: "opacity:0;" to hide sections of my content, which are triggered to show (using Javascript) once the user scrolls over these sections. I remember reading a while back that Google essentially ignores content which is hidden from your page (it mentioned they don't index it, so it's close to impossible to rank for it). Is this still the case? Thanks, Sam

                  Web Design | | Sam.at.Moz
                  0
                • SEOguy1

                  Problems preventing Wordpress attachment pages from being indexed and from being seen as duplicate content.

                  Hi According to a Moz Crawl, it looks like the Wordpress attachment pages from all image uploads are being indexed and seen as duplicate content..or..is it the Yoast sitemap causing it? I see 2 options in SEO Yoast: Redirect attachment URLs to parent post URL. Media...Meta Robots: noindex, follow I set it to (1) initially which didn't resolve the problem.  Then I set it to option (2) so that all images won't be indexed but search engines would still associate those images with their relevant posts and pages. However, I understand what both of these options (1) and (2) mean, but because I chose option 2, will that mean all of the images on the website won't stand a chance of being indexed in search engines and Google Images etc? As far as duplicate content goes, search engines can get confused and there are 2 ways for search engines
                  to reach the correct page content destination. But when eg Google makes the wrong choice a portion of traffic drops off (is lost hence errors) which then leaves the searcher frustrated, and this affects the seo and ranking of the site which worsens with time. My goal here is - I would like all of the web images to be indexed by Google, and for all of the image attachment pages to not be indexed at all (Moz shows the image attachment pages as duplicates and the referring site causing this is the sitemap url which Yoast creates) ; that sitemap url has been submitted to the search engines already and I will resubmit once I can resolve the attachment pages issues.. Please can you advise. Thanks.

                  Web Design | | SEOguy1
                  0
                • Dino64

                  Duplicate Content Issue: Mobile vs. Desktop View

                  Setting aside my personal issue with Google's favoritism for Responsive websites, which I believe doesn't always provide the best user experience, I have a question regarding duplicate content... I created a section of a Wordpress web page (using Visual Composer) that shows differently on mobile than it does on desktop view. This section has the same content for both views, but is formatted differently to give a better user experience on mobile devices. I did this by creating two different text elements, formatted differently, but containing the same content. The problem is that both sections appear in the source code of the page. According to Google, does that mean I have duplicate content on this page?

                  Web Design | | Dino64
                  0
                • codyfrew

                  Moving to new site. Should I take old blog posts with me?

                  Our company website has needed a complete overhaul for some time now and the new one is almost ready to go live.  We also have a separate "news" site that is houses around 800 blog posts and news items.  (That news site will be thrown away because it's on a completely different domain and causes confusion.) So we have a main site with about 100 decent blog posts and a separate news site with 800 poor posts. I plan on bringing all the main site blog posts over to the new site (both WordPress), but my question is whether or not to bring over the news site posts?  All, handful, none? Another issue is the news site doesn't have Google Analytics, so I'm not sure if any posts actually generate traffic, but I can from the main site we do get some referrals from it. As far as quality of content goes, it's poor.  Not sure who wrote it all, but it's mainly text press releases that aren't very interesting. Is it worth bringing over for SEO purposes or simply delete the site and create a mass redirect so all of those pages will direct to the new website's blog page? Any help is greatly appreciated.

                  Web Design | | codyfrew
                  0
                • mdorville

                  Subdomains, duplicate content and microsites

                  I work for a website that generates a high amount of unique, quality content. This website though has had development issues with our web builder and they are going to separate the site into different subdomains upon launch. It's a scholarly site so the subdomains will be like history and science and stuff. Don't ask why aren't we aren't using subdirectories because trust me I wish we could. So we have to use subdomains and I'm wondering a couple questions. Will the duplication of coding, since all subdomains will have the same design and look, heavily penalize us and is there any way around that? Also if we generate a good amount of high quality content on each site could we link all those sites to our other site as a possible benefit for link building? And finally, would footer links, linking all the subdirectories, be a good thing to put in?

                  Web Design | | mdorville
                  0
                • DFM_GSA

                  Should the parent directory of the main site-navigation be clickable or not?!?

                  Highly discussed in our team is the question: Should all parent navigation items be clickable, or only the ones that have no child menu appearing on mouse over? At Starwood Germany, we  would like to adjust the main navigation for all our websites in order to improve consistency and user friendliness. At the moment, most of our websites feature both clickable non-clickable parent items, depending on whether the items have a corresponding child menu (appearing on mouse over) or not. See example here: http://www.imperialvienna.com/en Some of our team members believe it might be irritating and/or confusing for the user if some items are clickable while others are not. What do you think? Any thoughts and insights would be truly appreciated!

                  Web Design | | DFM_GSA
                  0
                • DownPour

                  Infinite Scrolling vs. Pagination on an eCommerce Site

                  My company is looking at replacing our ecommerce site's paginated browsing with a Javascript infinite scroll function for when customers view internal search results--and possibly when they browse product categories also. Because our internal linking structure isn't very robust, I'm concerned that removing the pagination will make it harder to get the individual product pages to rank in the SERPs. We have over 5,000 products, and most of them are internally linked to from the browsing results pages in the category structure: e.g. Blue Widgets, Widgets Under $250, etc. I'm not too worried about removing pagination from the internal search results pages, but I'm concerned that doing the same for these category pages will result in de-linking the thousands of product pages that show up later in the browsing results and therefore won't be crawlable as internal links by the Googlebot. Does anyone have any ideas on what to do here? I'm already arguing against the infinite scroll, but we're a fairly design-driven company and any ammunition or alternatives would really help. For example, would serving a different page to the Googlebot in this case be a dangerous form of cloaking? (If the only difference is the presence of the pagination links.) Or is there any way to make rel=next and rel=prev tags work with infinite scrolling?

                  Web Design | | DownPour
                  0

                Get started with Moz Pro!

                Unlock the power of advanced SEO tools and data-driven insights.

                Start my free trial
                Products
                • Moz Pro
                • Moz Local
                • Moz API
                • Moz Data
                • STAT
                • Product Updates
                Moz Solutions
                • SMB Solutions
                • Agency Solutions
                • Enterprise Solutions
                • Digital Marketers
                Free SEO Tools
                • Domain Authority Checker
                • Link Explorer
                • Keyword Explorer
                • Competitive Research
                • Brand Authority Checker
                • Local Citation Checker
                • MozBar Extension
                • MozCast
                Resources
                • Blog
                • SEO Learning Center
                • Help Hub
                • Beginner's Guide to SEO
                • How-to Guides
                • Moz Academy
                • API Docs
                About Moz
                • About
                • Team
                • Careers
                • Contact
                Why Moz
                • Case Studies
                • Testimonials
                Get Involved
                • Become an Affiliate
                • MozCon
                • Webinars
                • Practical Marketer Series
                • MozPod
                Connect with us

                Contact the Help team

                Join our newsletter
                Moz logo
                © 2021 - 2025 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
                • Accessibility
                • Terms of Use
                • Privacy

                Looks like your connection to Moz was lost, please wait while we try to reconnect.