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 does badly formatted HTML affect SEO?
-
Our website uses a custom built CMS, but uses a fairly standard WYSIWYG text editor.
I've looked at some of the code it produces, and it's not pretty. My gut feeling tells me that this extra bloat is bad for SEO.
Am I right in thinking that Google doesn't look kindly upon badly formatted and bloated HTML?
Thanks,
James -
Great, thanks for the info. I always thought Google was really hot on compliance, but good to know there is a bit of leeway.
-
James, You might also want to look at the cached version of your page and then click on Text-only version and see if it shows up correctly. If it does, no need to worry from that perspective, but definitely worth checking from a usability, accessibility etc.
-
The main concern is whether or not the spider can read the HTML. If something's broken, the spider may get confused. It's a good idea to check the site's W3C compliance and correct what you can, but I'm certain the search engines don't ding you if you're not perfectly compliant.
The real problems with bad HTML are load times and cross-browser compatibility. (Although, frankly, great HTML can have cross-browser compatibility issues, since IE still refuses to get with the program.) Make sure the site looks good in all major browsers.
-
As long as the code produced is readable in a web browser then it being bloated shouldn't have much of an impact in terms of SEO. The code bloats only downside is that it might slow the page load which will have impact on SEO. Remember crawlers like Google bot essentially look at the page content in terms of textual content, what labels (alt tags etc), images and links are on there not how neatly it is presented or whether it is valid markup or not. I would take a look at your page speed otherwise I would worry as long as it is able to fulfil all the basic on page requirements such as headers, page titles etc.
Just to reiterate this - I have worked with CMS driven sites that aren't W3C compliant and don't produce the nicest html, but have loaded fast and ranked in the top 3 for competitive terms.
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
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.
Related Questions
-
SEO on dynamic website
Hi. I am hoping you can advise. I have a client in one of my training groups and their site is a golf booking engine where all pages are dynamically created based on parameters used in their website search. They want to know what is the best thing to do for SEO. They have some landing pages that Google can see but there is only a small bit of text at the top and the rest of the page is dynamically created. I have advised that they should create landing pages for each of their locations and clubs and use canonicals to handle what Google indexes.Is this the right advice or should they noindex? Thanks S
Intermediate & Advanced SEO | Jun 26, 2018, 6:28 AM | bedynamic0 -
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 | Oct 20, 2017, 1:30 PM | Chris81980 -
Are "Powered By..." type footer backlinks good or bad for SEO?
Hi guys, We're running a software company which is also selling WP themes amongst other things. We've heard recently that footer backlinks like "Powered by BigBangThemes" might do more harm than good. Some clients usually forget to change them - so we want to make sure we stop including them in case this is true. Thanks!
Intermediate & Advanced SEO | Jul 21, 2017, 8:31 AM | andy.bigbangthemes0 -
Is it bad for SEO to have a page that is not linked to anywhere on your site?
Hi, We had a content manager request to delete a page from our site. Looking at the traffic to the page, I noticed there were a lot of inbound links from credible sites. Rather than deleting the page, we simply removed it from the navigation, so that a user could still access the page by clicking on a link to it from an external site. Questions: Is it bad for SEO to have a page that is not directly accessible from your site? If no: do we keep this page in our Sitemap, or remove it? If yes: what is a better strategy to ensure the inbound links aren't considered "broken links" and also to minimize any negative impact to our SEO? Should we delete the page and 301 redirect users to the parent page for the page we had previously hidden?
Intermediate & Advanced SEO | Apr 7, 2016, 10:41 PM | jnew9290 -
Will the use of lightbox affect SEO?
I am looking to condense a features list on my pricing page. it is currently a static list however I want the user to click a button and a full list of standard features will pop up in a lightbox. How will this affect my SEO? Can Google read content in a lightbox?
Intermediate & Advanced SEO | Jan 6, 2015, 12:35 PM | ParkerSoftware0 -
Quick Question: Is it Bad for SEO to paste from Word to your CMS?
Hey just a quick question I'm having trouble finding a definitive answer to: Is the markup that is transferred from Word docs bad for SEO? We are managing to paste it and it looks fine, but the developers are worried that the extra code will be bad for SEO. Does anyone have solution besides pasting into Text Editor and formatting in the CMS? Is this necessary or can we just leave the extra code? Thank you!
Intermediate & Advanced SEO | Sep 4, 2014, 7:41 PM | keL.A.xT.o0 -
Is CloudFlare bad for SEO?
I have been hit by DDoS attacks lately...not on a huge scale, but probably done by some "script kiddies" or competitors of mine. Still, I need to take some action in order to protect my server and my site against all of this spam traffic that is being sent to it. In the process of researching the tools available for defending a website from a DDoS attack, I came across the service offered by CloudFlare.com. According to the CloudFlare website, they protect your site against a DDoS attack by showing users/visitors they find suspicious an interstitial that asks them if they are a real user or a bot...this interstitial contains a Captcha that suspicious users are asked to enter in order to visit the site. I'm just wondering what kind of an effect such an interstitial could have on my Google rankings...I can imagine that such a thing could add to increased click-backs to the SERPs and, if Google detects this, to lower rankings. Has anyone had experience with the DDoS protection services offered by CloudFlare, who can say a word or two regarding any effects this may have on SEO? Thanks
Intermediate & Advanced SEO | Apr 8, 2024, 11:49 AM | masterfish1 -
Is linking to search results bad for SEO?
If we have pages on our site that link to search results is that a bad thing? Should we set the links to "nofollow"?
Intermediate & Advanced SEO | Oct 23, 2011, 1:50 PM | nicole.healthline0