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 reputation grow with Reviews AI
      Moz Local

      Let your reputation grow with Reviews 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. 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
    4960
    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://moz.com/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

              • Daaveey

                Default Wordpress 301 Redirects of JS and CSS files. Bad for SEO & How to Fix?

                Hi there: We are developers with some digital marketing expertise, but a current issue has us perplexed. An outside SEO firm has asked us to clean up a large number of 301 redirects. Most of these are 'default' Wordpress behavior that relate to calling the latest version of a JS or CSS file. For instance, a JS file is called with this: https://websitexyz.com/wp-includes/js/wp-embed.min.js?ver=4.9.1 but ultimately redirects to this: https://websitexyz.com/wp-includes/js/wp-embed.min.js. We are being asked to prevent the redirect from happening by, presumably, calling the ultimate file to begin with. The issue is that, as far as we know, there's no easy way to alter WP behavior to call the ultimate file to begin with. Does anyone have any thoughts on this? Thanks.

                Intermediate & Advanced SEO | | Daaveey
                0
              • VeteransFirstMarketing

                SEO impact of 301 redirects based on IP addresses from a specific state

                Hello Moz Community! We are facing an issue that may or may not be unique, but need some advice and/or clarification on the best way to address the issue. We recently rebranded and launched a new site under a new domain and things have been progressing well.  However, despite all the up front legwork on trademarks and licensing, we have recently encountered a hiccup that forces us to revert to the old URL/branding for one specific state.  This may be a temporary issue that lasts a couple of months or it could potentially be in the court system for a couple of years. One potential solution we have discussed is to redirect the new site to the old site based on IP addresses for the state in question.  Looking for any guidance on what type of impact this may have on SEO.  Also open to any other suggestions or guidance on dealing with this situation. Thanks

                Intermediate & Advanced SEO | | VeteransFirstMarketing
                0
              • kvivek05

                SEO Impact of External links in JS tag

                We have our JS tag and iframe tag being used over by 100 leading websites. What would be the SEO impact if we added a follow link in the iframe. Would it have any negative impact ? Vivek

                Intermediate & Advanced SEO | | kvivek05
                0
              • roberthseo

                Domain name suffix impact on SEO

                Hello there, We are about to launch a new website and were wondering what impact a specific suffix would have from an SEO point of view. We were thinking about going for a domain which ends in .london as oppose to .com We are based in London and sell world wide via our website. We are suggesting www.domain.london as oppose to www.domain.com I would appreciate your views... Thanks

                Intermediate & Advanced SEO | | roberthseo
                0
              • Webdeal

                How Google Adwords Can Impact SEO Ranking ?

                Hi SEO Gurus, I have a question. How Google Adwords Can Impact SEO Ranking ?
                Positive , negative or neutral impact? I will appreciate if you will provide detailed answer Thank you for your time webdeal

                Intermediate & Advanced SEO | | Webdeal
                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
              • Positec

                How do 302 redirects from Akamai content targeting impact SEO?

                How do 302 redirects from Akamai content targeting impact SEO? I'm using Akamai content targeting to get people from countries and languages to the right place (eg www.abc.123 to redirect to www.abc.123/NL-nl/default.aspx where folks from the Netherlands get their localized site in dutch) and from the edge server closest to them.  As far as I know Akamai doesn't allow me to use anything but a 302.  Anyone run across this?  is this 302 a problem?  I did a fetch as googlebot on my main domain and all I see is the Akamai 302.  I can't imagine this is the first time Akamai has run across this but I would like to know for sure.

                Intermediate & Advanced SEO | | Positec
                0
              • kashyaplakkad

                What should I cover in a SEO proposal ?

                What should I cover in a SEO proposal? Is there any sample SEO Proposal template in SEOMoz?

                Intermediate & Advanced SEO | | kashyaplakkad
                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 - 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.