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
      • SEO Q&A
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • Case Studies
      • 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.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      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
      • 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.

      • Case Studies

        Explore how Moz drives ROI with a proven track record of success.

      • 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. Technical SEO
    4. 4XX Errors - Adding %5c%5c to Links

    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.

    4XX Errors - Adding %5c%5c to Links

    Technical SEO
    3
    7
    2561
    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.
    • potpiegirl
      potpiegirl last edited by

      Hi all  😃

      Hope someone can help me with this.

      The internal links on my hubby's business site occasionally break and add %5c%5c%5c endlessly to the end of the url - like this:

      site.com/about/hours-of-operation/\\\\\\\\%

      I cannot for the life of me figure out why it is doing this and while it has happened to me from time to time, I can't recreate it.

      My crawl diagnostics here in my SEOMox campaign show 19-20 urls doing this - it's nuts.

      Any insight?

      Thank you!!

      Jennifer

      ~PotPieGirl

      1 Reply Last reply Reply Quote 0
      • potpiegirl
        potpiegirl @irvingw last edited by

        Both Shane and I looked and neither of saw any / vs \ issues.

        Then, I just took a peek at my source code and look what I saw:

        http://screencast.com/t/y02R4RS2L

        Think that is it?

        Thanks for replying!

        Jennifer

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

          Sent you a PM, Shane - thanks so much for the offer!

          By "occasionally break", I mean that every now and again, any link on the site will freak out and add the %5c jibberish to the end.

          Jennifer

          1 Reply Last reply Reply Quote 0
          • Jinx14678
            Jinx14678 @potpiegirl last edited by

            It would really have to be....

            The only reason for a %5C is the use of backslash - as that is actually what it means in code.

            **business site occasionally break **

            How do you mean "break" ?

            My crawl diagnostics here in my SEOMox campaign show 19-20 urls doing this - it's nuts.

            Is the only issue from this in SEOMOZ reports?

            If you would like to PM me the site I can attempt to profile it

            1 Reply Last reply Reply Quote 1
            • potpiegirl
              potpiegirl @Jinx14678 last edited by

              Thanks for replying so quickly, Shane!

              I don't believe it's a / vs \ issue.  It's a wordpress site.  Key pages are in the top nav bar (all urls correct) and all the side bar links are 'widgets' and created by Wordpress.

              For some reason I am suspecting a theme issue, but if I can't recreate the error, I'll have no way of knowing if changing the theme solves the problem.

              Site has been online since 2010 with no issues...this is a new issue (past couple months according to crawl diagnostics).

              Thanks!!!

              Jinx14678 potpiegirl 2 Replies Last reply Reply Quote 0
              • irvingw
                irvingw last edited by

                somewhere in your url coding you added backslash instead of slash which is not valid.

                potpiegirl 1 Reply Last reply Reply Quote 1
                • Jinx14678
                  Jinx14678 last edited by

                  It appears from research it is actually \   (backslash)  not / (slash)

                  So possibly somewhere in your site you have used \ instead of /  but of course this is just a possibility, as it appears that %5C is the delimiter or interpretation of \ in original Unix.

                  Hope this helps

                  PS a quick check at http://www.w3schools.com/tags/ref_urlencode.asp verified %5c is URL encode, for backslash - as it is treated as a special character, so somewhere in your CMS or code, you have used backslash instead of slash.

                  potpiegirl 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

                  • Extima-Christian

                    Sitemap error in Webmaster tools - 409 error (conflict)

                    Hey guys, I'm getting this weird error when I submit my sitemap to Google. It says I'm getting a 409 error in my post-sitemap.xml file (https://cleargear.com/post-sitemap.xml). But when I check it, it looks totally fine. I am using YoastSEO to generate the sitemap.xml file. Has anyone else experienced this? Is this a big deal? If so, Does anyone know how to fix? Thanks EwTswL4

                    Technical SEO | | Extima-Christian
                    0
                  • Taiger

                    ?_escaped_fragment_= Duplicate error in Webmaster

                    Hi I am not sure where this came from ... ?escaped_fragment= But in webmaster we are seeing hundreds of pages with this and thus webmaster is saying that we have Pages with duplicate title tags How do I fix this, or remove it. Regards T

                    Technical SEO | | Taiger
                    0
                  • wplodge

                    How to set up internal linking with subcategories?

                    I'm building a new website and am setting up internal link structure with subcategories and hoping to do so with best Seo practices in mind.  When linking to a subcategory's main page, would I make the internal link  www.xxx.com/fishing/ or www.xxx.com/fishing/index.html or does it matter?  I'm just trying to avoid duplicate content I guess, if Google saw each page as a separate page.  Any other cautions when using subdirectories in my navigation?

                    Technical SEO | | wplodge
                    0
                  • Indiatravelz

                    How to fix broken links?

                    Hi, I use WordPress CMS with Yoast SEO plugin.  I have just found out that my 403 errors increased dramatically. It seems that all my tags below of each post are being broken for some reason. When i click on the tags i get the following massage: **403 Forbidden Request forbidden by administrative rules. ** I assume it has something to do with the configuration within Yoast SEO plugin. Dose anyone know how should i fix that? Thanks, Raviv evsGujA

                    Technical SEO | | Indiatravelz
                    0
                  • KLLC

                    What is link Schemes?

                    Hello Friends, Today I am reading about link schemes on http://support.google.com/webmasters/bin/answer.py?hl=en&answer=66356 there are a several ways how to avoid Google penalties and also talk about the low quality links. But I can't understand about  "Low-quality directory or bookmark site links" Is there he talked about low page rank, Alexa or something else?

                    Technical SEO | | KLLC
                    0
                  • ShopChameleon

                    404 Errors After Site Migration

                    Hello - I'm working on a website selling fashion accessories.  The site just went through a site migration from Yahoo! to Big Commerce.  Now we have a high level of warnings and errors from the crawl.  Few are mentioning sites I never seen before on the Yahoo! platform. I also notice that the pages crawled has doubled.  How can I fix or did I do something wrong with migration? I was running the website with minimal errors and now overwhelmed with errors all the error updates.  If I can get some assistance on what could be wrong, I would greatly appreciate. Thanks.

                    Technical SEO | | ShopChameleon
                    0
                  • EwanFisher

                    International Site Links In Footer

                    We have several international sites and we have them linked in the footer of our main .com site . Should we add "nofollow" to these links? Our concern is that Google could see these sites as a network?

                    Technical SEO | | EwanFisher
                    0
                  • Banknotes

                    Do web pages have to be linked to a menu?

                    I have a situation where people search for terms like, say 1978 one dollar bill. Even though there never was a 1978 one dollar bill.   I want to make a page to capture these searches but since there wasn't such a thing as a one dollar bill I don't want it connected to the rest of my content which is reality based.   Does that make sense? Anyway,  my question is,  can I publish pages that aren't linked to my menu structure but that will be searchable or, am I going to have to figure out a way to make these oddball pages accessible through my menu?

                    Technical SEO | | Banknotes
                    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
                  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.