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.

      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
      • 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. Technical SEO
    4. Speed benefits from loading images from a subdomain

    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.

    Speed benefits from loading images from a subdomain

    Technical SEO
    2
    3
    1685
    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.
    • Gordian
      Gordian last edited by

      I have read that loading images from a subdomain of your site instead of the main domain will give you speed benefits on load time. Has anyone actually seen that to be the case? Thanks!

      1 Reply Last reply Reply Quote 0
      • Gordian
        Gordian @TakeshiYoung last edited by

        Thanks for the helpful advice!

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

          If you are talking about using a cookie-free subdomain, that can definitely have an impact on site speed:

          http://developer.yahoo.com/performance/rules.html#cookie_free

          Just using a subdomain won't have any benefit, and may even slow things down. Using a CDN for images and other components is usually the quickest and easiest solution for most sites.

          Gordian 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

          • Ravi_Rana

            Why Product pages are throwing Missing field "image" and Missing field "price" in Wordpress Woocommerce

            technical seo structured data woocommerce wordpress seo

            I have a wordpress wocommerce website where I have uploaded 100s of products but it's giving me error in GSC under merchant listing tab. When I tested it show missing field image and missing field price. I have done everything according to https://developers.google.com/search/docs/appearance/structured-data/product#merchant-listing-experiences and applied fixed i.e. images are 800x800 and price range is also there. What else can be done here?!merchant listing.jpg

            Technical SEO | | Ravi_Rana
            0
          • WeAreDigital_BE

            Subdomain 403 error

            Hi Everyone, A crawler from our SEO tool detects a 403 error from a link from our main domain to a a couple of subdomains. However, these subdomains are perfect accessibly. What could be the problem? Is this error caused by the server, the crawlbot or something else? I would love to hear your thoughts.
            Jens

            Technical SEO | | WeAreDigital_BE
            0
          • SS.Digital

            Google Indexed a version of my site w/ MX record subdomain

            We're doing a site audit and found "internal" links to a page in search console that appear to be from a subdomain of our site based on our MX record.  We use Google Mail internally.  The links ultimately redirect to our correct preferred subdomain "www", but I am concerned as to why this is happening and if it can have any negative SEO implications. Example of one of the links: Links aspmx3.googlemail.com.sullivansolarpower.com/about/solar-power-blog/daniel-sullivan/renewable-energy-and-electric-cars-are-not-political-footballs I did a site operator search, site:aspmx3.googlemail.com.sullivansolarpower.com on google and it returns several results.

            Technical SEO | | SS.Digital
            0
          • solvid

            Server Connection Error when using Google Speed Test Insight and GTMetrix

            Hi Guys, Recently got into the issue when testing load speed of my website (https://solvid.co.uk). Occasionally, Google Speed Insights gives me a server connection error which states _"PageSpeed was unable to connect to the server. Ensure that you are using the correct protocol (_http vs https), the page loads in a browser, and is accessible on the public internet." Also, GTMetrix gives me an error as well, which states the following: "An error occurred fetching the page: HTTPS error: SSl connect attempt failed" All of my redirects seem to be set-up correctly as well as the SSL certificate. I've contacted my hosting provider (godaddy), they are saying that everything is fine with the server and the installation. Also, tried in different browsers in incognito mode, still gives me the same error. Until yesterday I haven't had such a problem. I've also attached the error screenshot links. I would really appreciate your help! Dmytro UxchPYR M52iPDf

            Technical SEO | | solvid
            1
          • bedbugsupply

            Reverse proxy a successful blog from subdomain to subfolder?

            I have an ecommerce site that we'll call confusedseo.com. I created a WordPress blog and CNAME'd it to blog.confusedseo.com. Since then, the blog has earned a PageRank of 3 and a decent amount of organic traffic. I am considering a reverse proxy to forward blog.confusedseo.com to confusedseo.com/blog/. As I understand it, this will greatly help the "link juice" of the root domain. However, I'm concerned about any potential harm done to the existing SEO value of the blog. What, if anything, should I be doing to ensure that the reverse proxy doesn't hurt my "juice" rather than help it?

            Technical SEO | | bedbugsupply
            0
          • BridgetGibbons

            For an image which is in the CSS and not the HTML, can you add an alt tag?

            I would like to improve SEO on a page with three big images, which are currently hosted in the CSS. The sample I am working with is at http://xquisitevents.com/about-us/ and I put my cursor over the big picture of the wedding dress with bouquet, I inspected the element and saw this code in a div tag: #upperleft { background-image:url(images/AboutTopLeft.jpg); Can I add an alt tag to the CSS somehow, or can I have it added to the HTML? What is the best way to handle this, to include keywords like exquisite weddings and special event designs?

            Technical SEO | | BridgetGibbons
            0
          • Dan-Lawrence

            Best geotargeting strategy: Subdomains or subfolders or country specific domain

            How have the relatively recent changes in how G perceives subdomains changed the best route to onsite geotargeting i.e. not building out new country specific sites on country specific and hosted domains and instead developing sub-domains or sub-folders and geo-targeting those via webmaster tools ? In other words, given the recent change in G perception, are sub-domains now a better option than a sub-folder or is there not much in it ? Also if client has a .co.uk and they want to geo-target say France, is the sub-domain/sub-folder route still an option or is the .co.uk still too UK specific, and these options would only work using a .com ? In other words can sites on country specific domains (.co.uk , .fr, .de etc etc) use sub-folders or domains to geo-target other countries or do they have no option other than to develop new country specific (domains/hosting/language) websites ? Any thoughts regarding current best practice in this regard much appreciated.  I have seen last Febs WBF which covers geotargeting in depth but the way google perceives subdomains has changed since then Many Thanks Dan

            Technical SEO | | Dan-Lawrence
            0
          • AndreVanKets

            Will errors on a subdomain effect the overall health of the root domain?

            As stated in the question, we have 2 sub domains that contain over 2000 reported errors from SEOMOZ. The root domain has a clean bill of health, and i was just wondering if these errors on the sub-domains could have a negative effect on the root domain in the eyes of Google. Your comments will be appreciated. Regards Greg

            Technical SEO | | AndreVanKets
            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.