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.
Sitespeed: Do images require width and height attributes?
-
Currently working on a sitespeed issue, and was wondering if not having width and height for images actually do cause a problem. We simply Photoshop the resolution we require for the image and add it to the page as is. I though this would actually speed it up, but I am getting from www.gtmetrix.com that we should have them.
What's your experience? Thanks!
-
Just came across a terrific resource that reminded me you'd asked about further reading, Ben.
Check out BrowserDiet for a huge collection of resources about tuning front-end performance of websites. (You'll see #6 talks about exactly your original question)
I can also recommend reading Steve Souder's two books - High Performance Websites and Even Faster Websites - both from O'Reilly. Souders is pretty much the leading specialist in this area. He's the creator of YSlow, one of the primary tools for measuring/analyzing site speed, and is now Head Performance Engineer at Google. His website is SteveSouders.com
That'll be more than enough to get you started. Lemme know if you're still hungry for more!
Paul
P.S. The report details from tests at webpagetest.org can also teach you a huge amount, and there's a forum there run by Patrick Meenan (who built webpagetest) which is just excellent. Patrick frequently answers questions personally.
-
you're welcome, hope your site will be speeding up a lot!!!
-
Yes, thank you. We size them all to what we want on the site so we are good there. Just got done doing it, and it did make a difference. Thanks guys!
-
as Paul correctly said, if your purpose is to improve the page speed just be sure that you're not resizing the images with css/html but that you're uploading the images in that dimensions.
An image of 10241024 resized to 100100 still weights as an 1024 image so my recommendation is to resize all those images to the desired dimensions, moreover if you can use an external cdn you'll save bandwith and have those images loading outside your website. That will help reducing the loadtime of the page.
-
Perfect-O! I completely get it now. Thanks Paul. You da man!
I thought it would be faster as in my mind it was more to read, but now that I understand the loading, I get it. Guess I need to start researching how a website loads. Have any resources I can read, to up my experience with this?
I've been in development but on an application side not website side.
-
The main reason PageSpeed and YSlow recommend including width and height for images is as much the perception of page speed as the actual load time, Ben.
When you include the image dimensions, the browser can draw out the "containers" that will hold the images, reserving the space for them while they download. The browser can then go on the paint the rest of the pages CSS and objects around those "containers" without having to go back and redraw the whole page once the images have downloaded and their sizes are then known.
This gives the user the illusion of a much faster, cleaner page load, and hence the impression of a faster website.
Does that make sense?
Paul
[Edited to add: You should still keep doing what you're doing to produce "size-as" images for your pages. You don't want to be resizing images with the html dimensions, just reporting in html the actual size of the image]
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
-
Why are my site images hosted by secureservercdn.net?
All of my image links are hosted on secureservercdn.net. for example, if i go to a webpage, mydomain.com/blog/blog-post and right click any image with a "copy image address" the images are all linking to secureservercdn.net/blablabla rather than mydomain.com/wp-uploads/blalblabla. this cannot be good for SEO. Any ideas why this would be? My site is hosted through GoDaddy, is it on their end? Thanks, Ryan
Intermediate & Advanced SEO | | RyanMeighan0 -
Thought FRED penalty - Now see new spammy image backlinks what to do?
Hi, So starting about March 9 I started seeing huge losses in ranking for a client. These rankings continue to drop every week since and we changed nothing on the site. At first I thought it must be the FRED update, so we have started rewriting and adding product descriptions to our pages (which is a good thing regardless). I also checked our backlink profile using OSE on MOZ and still saw the few linking root domains we had. Another Odd thing on this is that webmasters tools showed many more domains. So today I bought a subscriptions to ahrefs and instantly saw that on the same timeline (starting March 1 2017) until now, we have literally doubled in inbound links from very spammy type sites. BUT the incoming links are not to content, people seem to be ripping off our images. So my question is, do spammy inbound image links count against us the same as if someone linked actual written content or non image urls? Is FRED something I should still be looking into? Should i disavow a list of inbound image links? Thanks in advance!
Intermediate & Advanced SEO | | plahpoy0 -
Combining images with text as anchor text
Hello everyone, I am working to create sub-category pages on our website virtualsheetmusic.com, and I'd like to have your thoughts on using a combination of images and text as anchor text in order to maximize keyword relevancy. Here is an example (I'll keep it simple): Let's take our violin sheet music main category page located at /violin/, which includes the following sub-categories: Christmas Classical Traditional So, the idea is to list the above sub-categories as links on the main violin sheet music page, and if we had to use simple text links, that would be something like: Christmas
Intermediate & Advanced SEO | | fablau
Classical
Traditional Now, since what we really would like to target are keywords like: "christmas violin sheet music" "classical violin sheet music" "traditional violin sheet music" I would be tempted to make the above links as follows: Christmas violin sheet music
Classical violin sheet music
Traditional violin sheet music But I am sure that would be too much overwhelming for the users, even if the best CSS design were applied to it. So, my idea would be to combine images with text, in a way to put those long-tail keywords inside the image ALT tag, so to have links like these: Christmas
Classical
Traditional That would allow a much easier way to work the UI , and at the same time keep relevancy for each link. I have seen some of our competitors doing that and they have top-notch results on the SEs. My questions are: 1. Do you see any negative effect of doing this kind of links from the SEO standpoint? 2. Would you suggest any better way to accomplish what I am trying to do? I am eager to know your thoughts about this. Thank you in advance to anyone!1 -
Google not Indexing images on CDN.
My URL is: http://bit.ly/1H2TArH We have set up a CDN on our own domain: http://bit.ly/292GkZC We have an image sitemap: http://bit.ly/29ca5s3 The image sitemap uses the CDN URLs. We verified the CDN subdomain in GWT. The robots.txt does not restrict any of the photos: http://bit.ly/29eNSXv. We used to have a disallow to /thumb/ which had a 301 redirect to our CDN but we removed both the disallow in the robots.txt as well as the 301. Yet, GWT still reports none of our images on the CDN are indexed.
Intermediate & Advanced SEO | | alphonseha
The above screenshot is from the GWT of our main domain.The GWT from the CDN subdomain just shows 0. We did not submit a sitemap to the verified subdomain property because we already have a sitemap submitted to the property on the main domain name. While making a search of images indexed from our CDN, nothing comes up: http://bit.ly/293ZbC1While checking the GWT of the CDN subdomain, I have been getting crawling errors, mainly 500 level errors. Not that many in comparison to the number of images and traffic that we get on our website. Google is crawling, but it seems like it just doesn't index the pictures!?
Can anyone help? I have followed all the information that I was able to find on the web but yet, our images on the CDN still can't seem to get indexed.
0 -
Href lang in image or video XML sitemaps
Does anyone know if it is possible/recommended/not recommended to use href lang in image or video XML sitemaps? This had not crossed my mind until recently, but a client asked me this question and I couldn't find any information on this topic.
Intermediate & Advanced SEO | | ChrisKing0 -
Is it worth creating an Image Sitemap?
We've just installed the server side script 'XML Sitemaps' on our eCommerce site. The script gives us the option of (easily) creating an image sitemap but I'm debating whether there is any reason for us to do so. We sell printer cartridges and so all the images will be pretty dry (brand name printer cartridge in front of a box being a favourite). I can't see any potential customers to search for an image as a route in to the site and Google appears to be picking up our images on it's own accord so wonder if we'll just be crawling the site and submitting this information for no real reason. From a quality perspective would Google give us any kind of kudos for providing an Image Sitemap? Would it potentially increase their crawl frequency or, indeed, reduce the load on our servers as they wouldn't have to crawl for all the images themselves?
Intermediate & Advanced SEO | | ChrisHolgate
I can't stress how little of a hardship it will be to create one of these automatically daily but am wondering if, like Meta Keywords, there is any benefit to doing so?1 -
Creative Commons Images Good for SEO?
I've been looking at large image packages through iStock, Getty, Fotolia and 123RF, but before spending a bunch of money, I wanted to get some of your feedback on Creative Commons images. Should be worried that something found on Google Images > Search Tools > Usage Rights section can be used without issue or legal threats from the big image companies so long as they are appropriately referenced? AND will using these types of images and linking to the sources have any affect on SEO efforts or make the blog/website look spammy in Google's eyes because we need to link to the source? How are you using Creative Commons images and is there anything I should be aware of in the process of searching, saving, using, referencing, etc? Patrick
Intermediate & Advanced SEO | | WhiteboardCreations0 -
Is there a limit to images file names?
Hi, I have an eCommerce site with hundreds of product images. For management reasons files are named in length to have the product details in them.
Intermediate & Advanced SEO | | BeytzNet
Is there a limit for a filename length before it is considered ambiguous or spammy etc.?
(it usually ranges 50-70 chars). Thanks0
