


How to manage and clear the DNS host cache in chrome://net-internals
Jul 13, 2025 am 12:41 AMChrome provides DNS cache viewing and clearing functions through the chrome://net-internals page. The specific operations are as follows: 1. Enter chrome://net-internals in the address bar to enter the network status interface; 2. Click the DNS tab to view the current cache record, including the domain name, IP address and expiration time; 3. Click the Clear host cache button at the bottom of the page to clear the browser DNS cache, which is suitable for website migration, hosts file testing, or debugging CDN configuration, etc., but this operation does not affect the system level DNS cache. If necessary, you must clear the system cache through system commands such as ipconfig /flushdns for Windows or sudo killall -HUP mDNSResponder for macOS.
Chrome itself does not directly provide a "DNS cache" user interface, but through chrome://net-internals
page, you can view and clear internal network status, including DNS cache. This function is very useful for debugging website access issues, testing whether DNS modifications are effective, etc.

How to enter the chrome://net-internals page
To access this page, just enter:
chrome://net-internals
Then press Enter. You will see an interface with multiple tabs, where the DNS cache is related to the DNS tab.

How to view current DNS cache content
Click the DNS tab in the top navigation bar and you will see the DNS records in the current browser cache. These records usually include:
- Domain Name (Host)
- IP address (Address)
- Expires
This helps to tell if a domain name is still using old resolution, such as when you just changed your DNS settings.

How to clear DNS cache
If you want to manually clear the DNS cache, follow these steps:
- Click the DNS tab in the top navigation bar.
- Find the Clear host cache button at the bottom of the page and click.
This will immediately clear the current browser's DNS cache and allow the next request to re-dNS resolution.
Note: This is just to clear Chrome's own DNS cache and will not affect the operating system level DNS cache.
Practical application scenarios for clearing DNS cache
Some common situations where DNS caches need to be cleared include:
- After the website migrates the server, the old IP address is still cached.
- After testing the local hosts file modification, I want to confirm whether the browser uses the new parsing.
- When debugging a CDN or load balancing configuration, you want to quickly switch the IP address.
In this case, clearing the DNS cache in chrome://net-internals
can avoid access exceptions caused by cache.
Additional Note: Does the system-level DNS cache also need to be processed?
Yes, Chrome's DNS caching is just part of the entire process. If you find that even if the browser cache is cleared, some websites still cannot be accessed properly, you may also need to clear the system-level DNS cache:
Windows : Open a command prompt and run:
ipconfig /flushdns
macOS/Linux : Usually you need to restart the network service or use specific commands, such as running on macOS:
sudo killall -HUP mDNSResponder
Basically that's it. Although Chrome's DNS cache management is not particularly intuitive, it is quite convenient to use
chrome://net-internals
to view and clean it.The above is the detailed content of How to manage and clear the DNS host cache in chrome://net-internals. For more information, please follow other related articles on the PHP Chinese website!

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