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.

      Track your brand’s footprint in AI search
      Moz Pro

      Track your brand’s footprint in AI search

      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. 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
    1796
    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

          • mohammadrehanseo

            How to Boost Your WordPress Website Speed to 95+ (Without Premium Plugins)

            speed wordpress website speed technical seo

            I'm reaching out for some advice on improving my WordPress website's speed. I'm currently using a free theme for this fusion magazine and aiming for a score of 95+ on Google PageSpeed Insights. I'm aware that premium plugins can significantly enhance performance, but I'm hoping to achieve similar results using primarily free solutions and manual optimizations.

            Technical SEO | | mohammadrehanseo
            0
          • 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
          • Smileworks_Liverpool

            What's the best way for users to upload their images to my wordpress site to promote UGC

            I have looked at lots of different plugins and wanted a recommendation for an easy way for patients of ours to upload pictures of them out partying and having fun and looking beautiful so future users can see the final results instead of sometimes gory or difficult to understand before and after images. I'd like to give them the opportunity to write captions (like facebook or insta posts and would offer them incentives to do so. I don't want it to be too complicated for them or have too many steps or barriers but I do want it to look nice and slick and modern. Also do you think this would have a positive impact on SEO? I was also thinking of a Q&A app where dentists could get Q&A emails and respond - i've been doing AMA sessions and they've been really successful and I would like to bring it into out site and make it native. Thanks in advance 🙂

            Technical SEO | | Smileworks_Liverpool
            1
          • Happy-SEO

            Images, CSS and Javascript on subdomain or external website

            Hi guy's, I came across webshops that put images, CSS and Javascript on different websites or subdomains. Does this boost SEO results? On our Wordpress webshop all the sourcescodes are placed after our own domainname: www.ourdomainname.com/wp-includes/js/jquery/jquery.js?ver=1.11.3'
            www.ourdomainname.com/wp-content/uploads/2015/09/example.jpg Examples of other website: Website 1:
            https://www.zalando.nl/heren-home/ Sourcecode:
            https://secure-i3.ztat.net//camp/03/d5/1a0168ac81f2ffb010803d108221.jpg
            https://secure-media.ztat.net/media/cms/adproduct/ad-product.min.css?_=1447764579000 Website 2:
            https://www.bol.com/nl/index.html Sourcecode:
            https://s.s-bol.com/nl/static/css/main/webselfservice.1358897755.css
            //s.s-bol.com/nl/upload/images/logos/bol-logo-500500.jpg Website 3: 
            http://www.wehkamp.nl/ Sourcecode:
            https://static.wehkamp.nl/assets/styles/themes/wehkamp.color.min.css?v=f47bf1
            http://assets.wehkamp.com/i/wehkamp/350-450-layer-SDD-wk51-v3.jpg

            Technical SEO | | Happy-SEO
            0
          • evoNick

            Product Images with organic results in SERP

            Hey Mozzers, I've noticed that several of our product page results in Google have the product image associated with them.  Today is the first day I've seen this.  Does anyone know anything about these?  Has Google put anything out about this?  Here's a couple examples: http://content.screencast.com/users/Will_Swales/folders/Jing/media/08a16dcf-505e-443c-866d-fae6d805743e/2014-03-31_1031.png http://content.screencast.com/users/Will_Swales/folders/Jing/media/04972e7b-f6b2-4e78-ab11-95c52d69a200/2014-03-31_1056.png What's interesting is that they don't show for me when I use Chrome's Incognito mode. Any insights much appreciated! Will

            Technical SEO | | evoNick
            4
          • r1200gsa

            Does an subdomain hosted offsite provide SEO value

            We have a job board hosted through an applicant processing system which we've setup as a subdomain (jobs.ourcompany.com), most of the assets are hosted on our primary domain (ourcompany.com). My question is does having it hosted offsite provide any value? Do we get credit for that content being shared and distributed on the web or does the applicant processing system? As I see it the options are (correct me if I'm wrong): Host the job listings on our primary domain (ourcompany.com/jobs) and have it point to the application on the subdomain. Advertise the job listings pointing to the primary domain on the paid sites. The free job listing sites will automatically point to the sub-domain because the applicant processing system automatically submits them. Host the job listings entirely on the sub-domain applicant tracking system and link to it from our primary site navigation. Advertise the job listings to the sub-domain so that both free and paid point to the same place. Obviously the second one would be much easier just not sure on the technical side of our website getting credit by search engines as the one who has produced the content.

            Technical SEO | | r1200gsa
            0
          • findwell

            Does image domain name matter when using a CDN?

            Has anyone does studies on using a different CDN domain name for images on a site? Here is an example: or ![](<a)http://cdn.mydomain.com/image.jpg> mydomain.com ranks highly and many images show up in Google/Bing image searches. Is there any actual data that says that using your real domain name for the CDN has benefits versus the default domain name provided by the CDN provider? On the surface, it feels like it would, but I haven't experimented with it.

            Technical SEO | | findwell
            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

          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.