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.

      Let your business shine with Listings AI
      Moz Local

      Let your business shine with Listings AI

      Learn more
    • 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

      Unlock flexible pricing & new endpoints
      Moz API

      Unlock flexible pricing & new endpoints

      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
    3494
    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

                • Myles92

                  Is having a site map page necessary?

                  Hello all! So I know having a sitemap XML file is important to include in your robots.txt file.  I also know it is important to submit your XML sitemap to Google and Bing.  However, I am wondering if it is beneficial for your site's SEO value to have a sitemap page displayed on your website? Or is this just a redundant action if you have already done the above two actions with your XML sitemap? Thanks in advance!

                  Web Design | | Myles92
                  0
                • jwanner

                  How long should an old site redirecting to a new site remain activated on a server?

                  Once I switch a site to a new domain (with links to corresponding/relative pages), will I have to keep the old site live forever for those links to work, or how long should I wait before I inactivate the old site on our server?

                  Web Design | | jwanner
                  0
                • ShalinTJ

                  How can a Pincode finder website be SEO optimised?

                  Guys, I wanted to build a simple Pincode finder website for India. The targeted visitors as is obvious will be from India. Alike other Pincode finder websites, the users in this case too will have to key in the location / area of whose pincode he is looking for and they will get Pincode from that very location / area. Other than this, users will also come to this website when they search for something like " <location name="">pincode</location>" on Google (for instance, users will search for something like "Hiranandani Gardens Powai Pincode") Along with data fethced from our sources via Indian postal departments and other data available in public domain, we shall be using data from Google Maps API too. My question in regards to the same is as follows: What should the page-structure / structure of the website be for ranking well on Google? What should be the URL structure? Other suggestions to rank well on Google in this regards? Competition: (You can search for the term "Hiranandani Gardens Powai Pincode" to know how these sites show data) http://www.getpincode.info http://www.pincode.net.in Pls. help...

                  Web Design | | ShalinTJ
                  0
                • Robertnweil1

                  Having a second homepage for a site would affect my SEO?

                  Hello guys, One of our clients is planning to have a new landing page for any users hitting the site for the first time. (returning users will still see the current homepage based on cookies ... in other words, the site would technically have 2 home pages). According to this client, they are planning to do something like this: https://www.websitename.com/ (for returning visitors) https://www.websitename.com/newuser (for first time visitors) Our instinct is that is not great to have 2 home pages (that would affect the SEO campaign we are managing for this company) and we are not sure how to handle this. That's why we would appreciate your opinion regarding this topic: From an SEO perspective, do you think this is a good idea? If not, what would you guys do differentiate first-time visitors vs returning visitors without affecting SEO? Maybe just a pop-up? Thanks in advance for your help !

                  Web Design | | Robertnweil1
                  0
                • Tiberiu

                  Does Google penalize duplicate website design?

                  Hello, We are very close to launching five new websites, all in the same business sector. Because we would like to keep our brand intact, we are looking to use the same design on all five websites. My question is, will Google penalize the sites if they have the same design? Thank you! Best regards,
                  Tiberiu

                  Web Design | | Tiberiu
                  0
                • Lusodados

                  Seo and CSS media queries

                  Hello to all participants! I'm starting on responsive design with css media queries and I was wondering if hidding content can, in this case, can also be bad for seo? I know that hidding content is bad (eg. display: none;), but is it also like that with responsive design or does Google see it other way? If I have a news column with title, image and text for 1024px and hide the text and image leaving just the title for 768px, or smaller, will Google consider this black hat and will it be bad for seo? are there any articles I can read about this subject, and other similar subjects? sorry for my english 🙂 thanks

                  Web Design | | Lusodados
                  1
                • RetroOnline

                  Duplicate H1 tag IF it holds SAME text?

                  Hello people, I know that majority of SEO gurus (?) claim that H1 tag should only be used once per page. In the landing page design I'm working with, we actually need to repeat our core message stated in H1 & H2 - at the bottom of the page. Now the question is: Can that in any way cause any ranking penalty from big G? In my eyes that is not attempt to over optimize page as it contains SAME info as the H1 & H2 at the top of the page. Confusing, so I'm hope that some SEO gurus here will share some light on this. Thanks in advance!

                  Web Design | | RetroOnline
                  0
                • uwaim2012

                  Site Activity, SEO, and behind login

                  I have a site that provides online education and as such, most of the user activity happens behind a login. This has me thinking about potential SEO impacts with a few questions that maybe someone could lend some light on: How important is activity (above just search activity) to the search engines Would it help to enter these pages, even though they're behind a login, into GA as we have with the front-end of the site Does a subdomain make a difference (right now we implement the course as a subdomain of the main site Lastly, as I was looking at compete.com, I am wondering how they get these use statistics?

                  Web Design | | uwaim2012
                  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.