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.
Does google scrape links from PDF files? do these links pass link juice?
-
Title is pretty much the whole question.
-
I made a test and it seems that yes, the links from pdf count for ranking.
The test is on my Romanian blog http://seogan.ro/link-building-pdf-urile-o-sursa-de-linkuri-test
You can find an English translation here: http://www.seogan.com/pdf-link-building
Hope it helps.
-
Yes it does according to Google tech spec http://code.google.com/apis/searchappliance/documentation/50/admin_crawl/Introduction.html
which specifically states if follows html links in pdf 'It follows HTML links in PDF files, Word documents, and Shockwave documents'. Google's own api docs carry more weight than a comment in a forum_._ If they are licencing this out as an application it would suggest that the same technology is available in the main engine as does Dunamis's comment about a listing in a pdf document being found in search results.
You can test for youself by publishing a pdf with a link to a info page that does not show up in any other links. Include the pdf in your sitemap but not the test page and check if it shows in googles index site:yoursite.com the next time it crawls.
This also gives some insight in an interview with Matt Cutts - http://www.stonetemple.com/articles/interview-matt-cutts-012510.shtml
Eric Enge: What about PDF files?
Matt Cutts: We absolutely do process PDF files. I am not going to talk about whether links in PDF files pass PageRank. But, a good way to think about PDFs is that they are kind of like Flash in that they aren't a file format that's inherent and native to the web, but they can be very useful. In the same way that we try to find useful content within a Flash file, we try to find the useful content within a PDF file. At the same time, users don't always like being sent to a PDF. If you can make your content in a Web-Native format, such as pure HTML, that's often a little more useful to users than just a pure PDF file.
-
Google definitely does index the contents of pdf files. I found this out the hard way as I had a real estate pdf on my site that I wanted to have listed in the index, but I didn't know that the contents would be crawled. The pdf contained some listings that I was not legally allowed to advertise on my site. (It was legal for me to give someone a report with the listings in it though).
When another realtor was searching for their own listing, my pdf came up. I got in trouble. I'm ok now though.
-
Have a look at this article http://searchenginewatch.com/article/2067225/Google-Does-PDF-Other-Changes it explains some of the doc library search for pdf files and Google's statement here http://googleblog.blogspot.com/2008/10/picture-of-thousand-words.html.
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
-
Disavowing Links
I need some advice... I've noticed our link profile has increased with many comments links --- something I certainly have not pursued manually. I'm new to disavowing links. However, before I go ahead and disavow them, I'd like to ask how harmful these links are and would you recommend this is something I can do myself (relatively novice SEO) or if you'd recommend someone who could do this for a reasonable cost. In one instance, the link from this comment thread is with the anchor text, "porn"... Certainly not something we want to rank for, haha! I look forward to your advice
Link Building | | LukeBTDT0 -
Backlinks vs External Links vs Referral Links vs Outbound links
Hello all, I was just wondering if you could explain the difference between all the links above? I'm confused as they all seem to be the same or similar and I would just like to clearly know what distinguishes them from eachother. Thanks for your help, Jayne
Link Building | | NCOREGSEO0 -
Google Disavow File Update
Is there any specific format to update the Disavow file? Also if I submitted the file a months ago, and need to update it now... should I leave the old 'excluded domains' or should I remove them? Lets say this is what I have: How would you update it? #explanation from to Google went here... and ended here.
Link Building | | dhidalgo1
"domain:exampledomainalreadysubmitted1.com"
"domain:exampledomainalreadysubmitted2.com"
"domain:exampledomainalreadysubmitted3.com" Thanks for your input0 -
Linking to sites that link to porn or casinos, my site getting penalized?
I have some link exchanges with some sites to get web traffic but when i ran the bad neighborhood link checker, i found that one site links to some casinos and another site has one link to a porn site. Is this getting me penalized? should i remove the links to these sites? Thanks, Ron
Link Building | | Ron100 -
Do links behind paywalls pass value?
Hi - we are about to have a product review go live on a site that uses a paywall. Will the link from this still pass SEO value to our site, and should we therefore optimise it? Thanks
Link Building | | GBC0 -
Image only badges giving link juice!?!?
I see some chatter about badges, but no clear definition. A collegue of mine instituted badges on clients website, but these badges are only an image w/ hyperlink; no textual content. He is confident that this has worked successfully before as a link building strategy, which blew my mind. I thought we needed some text, and obviously optimizes anchor text for biggest benefit. Are these simple badges helpful, or do we need some html in there!? He also routes them through bit.ly to track impressions and clicks.. does that have any effect as well? Thanks!
Link Building | | SwissNinja0 -
Why is Google not following a 301 redirect on the robots.txt file?
Hi Guys, I recently posted a question on the Google Webmasters Forum http://www.google.com/support/forum/p/Webmasters/thread?tid=683e71557db7fd54&hl=en&fid=683e71557db7fd540004a4b4add8cbb6 and didn't get a satisfactory feedback so I thought I will put this to the SEO gurus on here. Perhaps one of you guys might good buddies with Matt and might be able to ask him directly. I actually posted on Matt's blog but he hasn't got back to me. Basically we did a URL restructure for client and set up 301 redirects and saw a huge drop in rankings over time. The 301 redirects seem to work fine and have been tested by many many people. We suspected that google might be ignoring the 301 redirects or devaluing them and so I reviewed the server log to see what is happening when the googlebot crawls the site and it showed that on many occasions the googlebot did not reload the page after hitting a 301 redirect. Sure.. you might say it probably queues it or Google might just be checking that the 301 redirect is still in place but why check so often (with a few hours to a day on the same URL) it even skips a 301 redirect on the robots.txt file i.e. from http://clientsite.com/robots.txt to http://www.clientsite.com/robots.txt. from non-www to www version. I don't think it is easy to dismiss the skipping of the robots.txt file - this 301 redirect should be loaded immediately to use the instructions the gooblebot requires to crawl the page. Any help will be appreciated. I can sent the server log to anyone personally but I am reluctant to post it on here. Regards, Zan
Link Building | | FRL0
