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.
Image Height/Width attributes, how important are they and should a best practice site include this as std
-
Hi
How important are the image height/width attributes and would you expect a best practice site to have them included ?
I hear not having them can slow down a page load time is that correct ?
Any other issues from not having them ?
I know some re social sharing (i know bufferapp prefers images with h/w attributes to draw into their selection of image options when you post)
Most importantly though would you expect them to be intrinsic to sites that have been designed according to best practice guidelines ?
Thanks
-
Thanks for confirming that Paul !
Ive also noticed that when using services like Buffer etc, to post socially, that the articles image is not being displayed as an option in the images to choose from, to display as the image in the post, Instead its only showing options like the site logo etc which we don't want. I asked Buffer tech support and they said that if the images had height/width attributes then they should then be presented as image options to accompany the post
All Best
Dan
-
Image h x w attributes don't affect the actual speed of your page load much, Dan. They do strongly affect the perceived speed to the user.
If the size attributes are included, the browser can leave a correctly-sized space for each image as the page gets rendered, even if the images haven't started to download yet. Then the rest of the page content flows in around the image "placeholders". (Images are always slower than text.)
If no image size attributes are present, the browser essentially ignores the placing of the images until the image files actually download, then redraws the whole page to add the space back in for the images.
This redrawing for the images means that text and other elements will move around on the page until all the images have downloaded and it has finished rendering. This gives the user an impression of a much slower page, since they can't start to read the content until it has stopped moving around. Done properly, the visitor can start reading the top of the page even while all the images lower on the page are still downloading.
So yes, obviously including height and width attributes for images is standard best practice for designing an effective on-page user experience.
Hope that helps?
Paul
P.S. As proof, Google thinks they're such a standard requirement that they have included a check for them as part of the scoring algorithm of their Google Page Speed tool.
-
"How important are the image height/width attributes and would you expect a best practice site to have them included ?"
This is not the most important SEO thing in the world BUT according to your 2nd question
"I hear not having them can slow down a page load time is that correct ?"
That`s the point! The question related to this issue is how relevant the whole thing might be?
Modern browsers and broadband connections seem to make this insignificant but just in case there are some visitors which are not using the right settings they might get pictures unscaled and your whole site will be shown non-responsive... by the way, use responsive designs if you can to avoid that...
I
ve always been told to use these parameters . even if you dont need it it ensures that your code is a little bit more perfect
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
-
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_Liverpool1 -
ALT attribute keyword on the same image but different pages
Hi there, As i'm sure you're probably aware, moz advises to use a keyword within the ALT attribute on pages... On a new website I am launching, I have the ability to add an alt keyword to image headers. On multiple pages we have the exact same image but with different keywords associated them inside the alt attribute. The image itself is a collage of different images and so the keywords used can, quite sneakily, match the image. My question is therefore, will using different keywords on the same image on different pages have a negative effect on SEO? Thanks, Stuart
Technical SEO | | Stuart260 -
Best Practice on 301 Redirect - Images
We have two sites that sell the same products. We have decided to retire one of the sites as we'd like to focus on one property. I know best practice is to redirect apples to apples, which in our case is easily done since the sites sold the same thing. www.SiteABC.com/ProductA can be redirected to www.SiteXYZ.com/ProductA. My question is how far does that thinking go regarding images? Each product has a main product page, of course, and then up to 6 images in some cases. Is it necessary to redirect www.SiteABC.com/ProductA-Image1.jpg to www.SiteXYZ.com/ProductA-Image1.jpg? Or can they all be redirected to just the product page?
Technical SEO | | Natitude0 -
WordPress - How to stop both http:// and https:// pages being indexed?
Just published a static page 2 days ago on WordPress site but noticed that Google has indexed both http:// and https:// url's. Usually I only get http:// indexed though. Could anyone please explain why this may have happened and how I can fix? Thanks!
Technical SEO | | Clicksjim1 -
/~username
Hello, The utility on this site that crawls your site and highlights what it sees as potential problems reported an issue with /~username access seeing it as duplicate content i.e. mydomain.com/file.htm is the same as mydomain.com~/username/file.htm so I went to my server hosts and they disabled it using mod_userdir but GWT now gives loads of 404 errors. Have I gone about this the wrong way or was it not really a problem in the first place or have I fixed something that wasn't broken and made things worse? Thanks, Ian
Technical SEO | | jwdl0 -
Cloaking? Best Practices Crawling Content Behind Login Box
Hi- I'm helping out a client, who publishes sale information (fashion sales etc.) In order for the client to view the sale details (date, percentage off etc.) they need to register for the site. If I allow google bot to crawl the content, (identify the user agent) but serve up a registration light box to anyone who isn't google would this be considered cloaking? Does anyone know what the best practice for this is? Any help would be greatly appreciated. Thank you, Nopadon
Technical SEO | | nopadon0 -
What is the best method to block a sub-domain, e.g. staging.domain.com/ from getting indexed?
Now that Google considers subdomains as part of the TLD I'm a little leery of testing robots.txt with something like: staging.domain.com
Technical SEO | | fthead9
User-agent: *
Disallow: / in fear it might get the www.domain.com blocked as well. Has anyone had any success using robots.txt to block sub-domains? I know I could add a meta robots tag to the staging.domain.com pages but that would require a lot more work.0 -
Why are old versions of images still showing for my site in Google Image Search?
I have a number of images on my website with a watermark. We changed the watermark (on all of our images) in May, but when I search for my site getmecooking in Google Image Search, it still shows the old watermark (the old one is grey, the new one is orange). Is Google not updating the images its search results because they are cached in Google? Or because it is ignoring my images, having downloaded them once? Should we be giving our images a version number (at the end of the file name)? Our website cache is set to 7 days, so that's not the issue. Thanks.
Technical SEO | | Techboy0