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.

      Turn SEO data into actionable content briefs

      Turn SEO data into actionable content briefs

      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.

      Let your business shine with Listings AI

      Let your business shine with Listings AI

      Get found
    • 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. SEO Tactics
    3. Intermediate & Advanced SEO
    4. How much does dirty html/css etc impact SEO?

    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.

    How much does dirty html/css etc impact SEO?

    Intermediate & Advanced SEO
    3
    5
    5037
    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.
    • HashtagHustler
      HashtagHustler last edited by

      Good Morning!

      I have been trying to clean up this website and  half the time I can't even edit our content without breaking the WYSIWYG Editor. Which leads me to the next question. How much, if at all, is this impacting our SEO. To my knowledge this isn't directly causing any broken pages for the viewer, but still, it certainly concerns me.

      I found this post on Moz from last year:

      http://azwa.1clkaccess.in/community/q/how-much-impact-does-bad-html-coding-really-have-on-seo

      We have a slightly different set of code problems but still wanted to revisit this question and see if anything has changed.

      I also can't imagine that all this broken/extra code is helping our page load properly.

      Thanks everybody!

      1 Reply Last reply Reply Quote 0
      • LesleyPaone
        LesleyPaone @jlane9 last edited by

        Invalid code does not equate to slow code. Google used to purposely not close html and body tags to save bandwidth and loading time. I took the question as meaning w3c valid code.

        1 Reply Last reply Reply Quote 0
        • jlane9
          jlane9 last edited by

          Bad code can definately affect seo rankings for a website.

          The question really depends on what exactly is wrong with the code. If its causing problems with page load speed times, that could be a problem for sure. HTML code and css code errors if written poorly or outdated does not really matter for actual seo and rankings on thier own. Unless these erros are causing other issues such as user experience which would increase bounce rates and affect rankings. If the code errors are causing duplicate pages., Html errors like missing H1, tags and such can affect on page seo scores which affect rankings. So in my honest opinion bad code can definately affect seo rankings for a website.

          Free page speed test with results breakdown can be had there => http://www.webpagetest.org

          Definately clean up all the HTML seo factors, usuability issues and page speed issues.  Hope that helps, Have a great day, Joe

          LesleyPaone 1 Reply Last reply Reply Quote 0
          • HashtagHustler
            HashtagHustler last edited by

            I love him...

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

              As long as links are not broken and resources are not returning 404 errors, my understanding is that it is not affected at all. The only thing I would make sure of is that fetch as google returns the page looking like it should. Here is a video from the authority on the matter.

              https://www.youtube.com/watch?v=j3KgrbiB1pc#t=52

              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

              • ds9.tech

                Ogranization Schema/Microformat for a content/brand website | Travel

                Hi, One of our clients have a website specific to a place, for eg. California Tourism in which they publish local information related to tourism, blogs & other useful content. I want to understand how useful is to publish Organization Schema on such website mentioning the actual Organization, which in this case is a Travel Agency? Or any other schema would fit in for such websites?

                Intermediate & Advanced SEO | | ds9.tech
                0
              • Chris8198

                Lightboxes and SEO

                Do lightboxes (AKA popup boxes when you click "learn more" type CTAs) have any negative effect on SEO? We are looking at revamping our sites to have more of a tiled approach, and a lightbox with summary content popping out with additional CTAs, directing to pages with more information or free trial pages. Is there any downside to this approach from an organic perspective? is there anything specific to keep in mind when creating these if not?

                Intermediate & Advanced SEO | | Chris8198
                0
              • McTaggart

                What does Disallow: /french-wines/?* actually do - robots.txt

                Hello Mozzers - Just wondering what this robots.txt instruction means: Disallow: /french-wines/?* Does it stop Googlebot crawling and indexing URLs in that "French Wines" folder - specifically the URLs that include a question mark? Would it stop the crawling of deeper folders - e.g. /french-wines/rhone-region/ that include a question mark in their URL? I think this has been done to block URLs containing query strings. Thanks, Luke

                Intermediate & Advanced SEO | | McTaggart
                0
              • lfrazer

                Intro to programming/coding for seo

                Hello, I am currently a SEO and am looking for an Intro to programming/coding course to help me implement various technical SEO tasks for my clients and the business-as the programming dept will not help me, as they do not see the value of SEO. Could someone pls recommend an online course that would introduce me to basic concepts and also specifically, the information that would help me to enhance our SEO? I would also like to better understand APIs. Thanks so much in advance for your help! Lauren

                Intermediate & Advanced SEO | | lfrazer
                1
              • KS__

                How to rank for a location/country without having a physical address in that location/country

                How do I go about it if my physical address (office) is in Country A but I want to rank my website in Country B, C and D (without having an office or physical address in the countries B, C and D)? I am aware of people setting up virtual offices in other countries/cities and adding them to Google Places/Maps with toll free phone numbers, but I don't wish to do any of that. I know Google will catch up with this one day or the other and punish me hard for trying to play games with it. Is there a way rank a website in another country without actually having a physical location there? If yes, please guide me how to go about it.

                Intermediate & Advanced SEO | | KS__
                0
              • theLotter

                SEO Advice for Angular JS

                We are changing our homepage (and gradually the rest of the site) to Angular JS.
                In order not to lose anything in terms of SEO we are implementing Hashbangs + escaped fragment snapshots. Are there any other SEO considerations you think we should have and/or additional elements that we could add to the page to improve it in terms of SEO?

                Intermediate & Advanced SEO | | theLotter
                0
              • lighttable

                How much impact do Youtube transcripts have?

                We're considering transcribing our videos. It's a significant enough expense that we have to be sure of the impact. 1. How much effect do the transcripts have on Youtube SEO rankings? 2. Should we also post the transcripts beneath the video, or is uploading them sufficient? If we didn't post the transcripts, we'd just write custom keyword rich text for each video. We could post both keyword text and transcript text, but that may be too wordy. Does anyone have experience on how much Youtube transcripts impact rankings? Thanks

                Intermediate & Advanced SEO | | lighttable
                0
              • scanlin

                Does capitalization matter for SEO?

                Two places capitalization comes into play: (1) on-page use (title, h1, body text, img alt text, etc) (2) external anchor text I didn't think it mattered from Google's point of view for on-page usage (is this correct?) but I notice that OpenSiteExplorer' s 'anchor text distribution' tab shows different counts for the same keyword if it's capitalized in different ways (eg seomoz.org is listed separate from SEOmoz.org). Is that just OSE or does Google treat the keyword/phrase different based on its capitalization, too? And if so, then should I be creating external links to my site with the 'regular' and 'Capitalized' versions of my key phrases?

                Intermediate & Advanced SEO | | scanlin
                1

              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 - 2026 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.