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.
Find all external 404 errors/links?
-
Hi All,
We have recently discovered a site was linking to our site but it was linking to an incorrect url, resulting in a 404 error. We had only found this by pure chance and wondered if there was a tool out there that will tell us when a site is linking to an incorrect url on our site?
Thanks

-
If you dont have access to the logs that could be an issue - not really any automated tools out there as it would need to crawl every website and find 404 errors.
I haven't tried this - so its just an idea. Go into GSC download all the links pointing to your site (and from places like Moz, Ahrefs, Majestic) and then chuck that list of urls into Screaming Frog or URL Profiler and look at external links and see if any are returning a 404. Not sure if this would work - its just an idea.
Thanks
Andy
-
Great, will take a look. Maybe run a trial to see if it does exactly what I need

Thanks for the info!
-
Good idea!
Although some of our clients that we do SEO for aren't hosting their websites on our server and we don't have access to their server logs etc.
Was hoping for an automated dashboard like MOZ/Screaming Frog/ or A hrefs as mentioned above. Due to the amount of clients we have, opening up and running through all there Log files could be time consuming.
Cheers for the info though, may come in use in the future, or to someone else reading this

-
Hi
The best way I have found is to look in your server logs, its the only true place to find out what Google is doing on your site.
Download the logs and look at all the 404 errors - quite simple and depending on size of your logs can take you around 5 minutes worth a work - the longer time period you can analyse in your logs the better.
Thanks
Andy
-
Hi David.
Ahrefs.com offers that service: broken links.
Another way to do that search could be this: Downloading the historic backlinks list and with a mass checker, check where do they point nowdays. I've used GScraper and its option to crawl outbound links.
Best Luck.
GR.
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
-
Can you use Screaming Frog to find all instances of relative or absolute linking?
My client wants to pull every instance of an absolute URL on their site so that they can update them for an upcoming migration to HTTPS (the majority of the site uses relative linking). Is there a way to use the extraction tool in Screaming Frog to crawl one page at a time and extract every occurrence of _href="http://" _? I have gone back and forth between using an x-path extractor as well as a regex and have had no luck with either. Ex. X-path: //*[starts-with(@href, “http://”)][1] Ex. Regex: href=\”//
Technical SEO | | Merkle-Impaqt0 -
Do I use /es/, /mx/ or /es-mx/ for my Spanish site for Mexico only
I currently have the Spanish version of my site under myurl.com/es/ When I was at Pubcon in Vegas last year a panel reviewed my site and said the Spanish version should be in /mx/ rather than /es/ since es is for Spain only and my site is for Mexico only. Today while trying to find information on the web I found /es-mx/ as a possibility. I am changing my site and was planning to change to /mx/ but want confirmation on the correct way to do this. Does anyone have a link to Google documentation that will tell me for sure what to use here? The documentation I read led me to the /es/ but I cannot find that now.
Technical SEO | | RoxBrock0 -
Disallow: /404/ - Best Practice?
Hello Moz Community, My developer has added this to my robots.txt file: Disallow: /404/ Is this considered good practice in the world of SEO? Would you do it with your clients? I feel he has great development knowledge but isn't too well versed in SEO. Thank you in advanced, Nico.
Technical SEO | | niconico1011 -
Backlinks that we have if they are 404?
Hi All, Backlinks that we have if they are 404? Open site explorer shows 1,000 of links and when I check many are 404 and those are spammy links which we had but now the sites are 404 I am doing a link profile check which is cleaning up all spammy links Should i take any action on them? As open site explorer or Google still shows these links on the searches. Should we mention these URL's in disallow in Google webmaster. Thanks
Technical SEO | | mtthompsons0 -
Is there a way of changing the Permalink without getting the 404 Error?
Hi, I am new to this all.. Is there a way of changing the permalink for example from: domain/content/ to domain/profile/ without receiving the 404 error message. It's just that since my website has been developed, some pages and their content have changed but the permalink still shows the name of the old page which may be confusing. Ps. Please use most simple language for explanations as I am really new to it. Thank you! Ve
Technical SEO | | MissVe0 -
4XX Errors - Adding %5c%5c to Links
Hi all 😃 Hope someone can help me with this. The internal links on my hubby's business site occasionally break and add %5c%5c%5c endlessly to the end of the url - like this: site.com/about/hours-of-operation/\\\\\\\\% I cannot for the life of me figure out why it is doing this and while it has happened to me from time to time, I can't recreate it. My crawl diagnostics here in my SEOMox campaign show 19-20 urls doing this - it's nuts. Any insight? Thank you!! Jennifer ~PotPieGirl
Technical SEO | | potpiegirl0 -
Do Backlinks to a PDF help with overall authority/link juice for the rest of the domain?
We are working on a website that has some high-quality industry articles available on their website. For each article, there is an abstract with a link to the PDF which is hosted on the domain. We have found in Analytics that a lot of sites link directly to the PDF and not the webpage that has the abstract of the article. Can we get any benefit from a direct PDF link? Or do we need to modify our strategy?
Technical SEO | | MattAaron0 -
Should there be a canonical tag on my 404 error page?
In my crawl diagnostics, I notice some 4xx client errors. They are appearing for pages that no longer exist, so I'm not sure what the problem is. Shouldn't they just be dealt as 404's? Anyway, on closer inspection I noticed that my 404 error page contains a canonical tag which points to the missing page. Could this be the issue? Is it a good idea to remove the canonical tag from this error page? Thanks.
Technical SEO | | Leighm0