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.
Missing Canonical Tag for a PDF document
-
Error: Missing Canonical Tag
But URL is not a webpage it is a PDF document, is this fixable? -
@Adnan-farooq said in Missing Canonical Tag for a PDF document:
i don't think that we used canonical tag for PDF document i think no option is visible on moz

Hitachi Workshop Manual Instant Download PDF at your fingertips. Access valuable resources for quick and efficient equipment maintenance and operation. Don't miss out on this essential source for Hitachi machinery enthusiasts.
-
Hitachi Workshop Manual Instant Download PDF at your fingertips. Access valuable resources for quick and efficient equipment maintenance and operation. Don't miss out on this essential source for Hitachi machinery enthusiasts.
-
-
There's two answers to this.
One is that whilst it's best practice for all URLs to have a canonical (even if it's self-referencing), if this resource has no duplicates, it's not mandatory.
The other is that yes, you can add a canonical tag to a web page. You'd have to do it at the HTTP header level.
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
-
"Duplicate without user-selected canonical” - impact to Google Ads costs
Hello, we are facing some issues on our project and we would like to get some advice. Scenario
Paid Search Marketing | | Alex_Pisa
We run several websites (www.brandName.com, www.brandName.be, www.brandName.ch, etc..) all in French language . All sites have nearly the same content & structure, only minor text (some headings and phone numbers due to different countries are different). There are many good quality pages, but again they are the same over all domains. Current solution
Currently we don’t use canonicals, instead we use rel="alternate" hreflang="x-default": <link rel="alternate" hreflang="fr-BE" href="https://www.brandName.be/" /> <link rel="alternate" hreflang="fr-CA" href="https://www.brandName.ca/" /> <link rel="alternate" hreflang="fr-CH" href="https://www.brandName.ch/" /> <link rel="alternate" hreflang="fr-FR" href="https://www.brandName.fr/" /> <link rel="alternate" hreflang="fr-LU" href="https://www.brandName.lu/" /> <link rel="alternate" hreflang="x-default" href="https://www.brandName.com/" /> Naturally this si reflected in ""Duplicate without user-selected canonical” . Issue
We create the same ad in Google Ads for 2 domains. So the content is mostly identical, ads are identical, target URLs differ only in domain. Yet Google Ads “Quality score” is different (10/10 vs. 6/10) and “Landing page experience” is very different (Above average vs. Average). Some members of our team think lower “Landing page experience” increases the Google Ads costs, which I personally don't believe, but I want to double check. Question: Can “Duplicate without user-selected canonical” issue decrease the “Landing page experience” rating and as result can it cause higher Google ads costs? Any suggestions/ideas appreciated, thanks. Regards.0 -
Hidden H1 Tag on Image
Hi, In the page I'm working on, I encountered an tag in an image, rather than in a text form. Do you think it's an issue when it comes to SEO?
Technical SEO | | nerdieb
What do you suggest I should do if there is an issue? Keen to hear from you!0 -
Is it ok to use H1 tags in breadcrumbs?
A client has an e-commerce site and she doesn't want a page title on the products page. She has breadcrumbs though. Her website developer suggests putting the H1 on the breadcrumbs. So: products> Gifts > picture frame with h1 tags round the word "picture frame". Is this ok to do? Or is it a bad thing for SEO purposes? Thanks
Technical SEO | | AL123al0 -
Question on noscript tags and indexing
If I have a <noscript>tag on every page of my website with the same sentence over and over saying something to the effect of "Sorry our site uses Javascript, please enable javascript for the full site experience.", Webmaster Tools will tell me that one of the most common words on my site is "Javascript".</p> <p>Is this something to be concerned about from an SEO perspective? My site is obviously not about Javascript and I don't want to dilute my page's topic or authority by repeating words that are not relevant to the topic of my site.</p> <p>Thanks!</p></noscript>
Technical SEO | | IrvCo_Interactive0 -
Missing meta descriptions from Google SERPs
Hullo all, I run an e-commerce website and hence have a lot of product category/sub-category pages to handle. Despite giving each of these category pages meta descriptions, in the Google SERPs, a lot of these descriptions don't show up fully. Rather, only half the text that I'd inputed as my meta desc. shows up; the other half has generic stuff from that page given. I've attached a screen shot to give you an example of what comes up in the SERPs. Could you please tell me what exactly is the problem? Is it a coding issue? Or has Google not crawled that page? Need help asap! Thank you in advance! aE9RKXJ
Technical SEO | | suchde0 -
Canonical tag for Home page: with or without / at the end???
Setting up canonical tags for an old site. I really need advice on that darn backslash / at the end of the homepage URL. We have incoming links to the homepage as http://www.mysite.com (without the backslash), and as http://www.mysite.com/ (with the backslash), and as http://www.mysite.com/index.html I know that there should be 301 redirects to just one version, but I need to know more about the canonical tags... Which should the canonical tag be??? (without the backslash) or (with the backslash) Thanks for your help! 🙂
Technical SEO | | GregB1230 -
What happens when you put an image in an H1 tag?
I am currently updating some H1 tags for my site but the tags are generated automatically by the text that is entered into a field on our content manager software. However because we need an image in this area as well, the entire field including the code for the image is surrounded by an H1 tag. Is this bad for SEO?
Technical SEO | | eVacStore0 -
Do I need to add canonical link tags to pages that I promote & track w/ UTM tags?
New to SEOmoz, loving it so far. I promote content on my site a lot and am diligent about using UTM tags to track conversions & attribute data properly. I was reading earlier about the use of link rel=canonical in the case of duplicate page content and can't find a conclusive answer whether or not I need to add the canonical tag to these pages. Do I need the canonical tag in this case? If so, can the canonical tag live in the HEAD section of the original / base page itself as well as any other URLs that call that content (that have UTM tags, etc)? Thank you.
Technical SEO | | askotzko1