crawler4j
What is crawler4j?
About
crawler4j is an uncategorized agent. It's not currently known to be artificially intelligent or AI-related. If you think that's incorrect or can provide more detail about its purpose, please contact us.
You can set up agent analytics to see when crawler4j visits your website.
Type
Expected Behavior
Behavior will vary depending on whether this agent is a search engine crawler, data scraper, archiver, one-off fetcher, etc.
Insights
crawler4j Visiting Your Website
Half of your traffic probably comes from artificial agents, and there are more of them every day. Track their activity with the API or WordPress plugin.
Set Up Agent AnalyticsOther Websites
Access Control
Should I Block crawler4j?
It's difficult to say without a type. Its purposes could either be good or bad for your website, depending on what it is.
Using Robots.txt
You can block crawler4j or limit its access by setting user agent token rules in your website's robots.txt. We recommend setting up agent analytics to check whether it's actually following them.
| User Agent Token | Description |
|---|---|
crawler4j |
Should match instances of crawler4j |
# robots.txt
# This should block crawler4j
User-agent: crawler4j
Disallow: /
Instead of doing this manually, you can use the API or Wordpress plugin to keep your robots.txt updated with the latest known AI scrapers, crawlers, and assistants automatically.
Set Up Automatic Robots.txt