Blocking SketchUp via the hosts file is a method used to prevent the application from communicating with specific online servers, such as for license verification or update checks. This process involves redirecting SketchUp's connection attempts to a non-existent local address ( ) on your own computer. How to Block SketchUp Using the Hosts File
To perform this on Windows, you must edit the system's hosts file with administrative privileges.
Locate the File: Navigate to C:\Windows\System32\drivers\etc.
Prepare for Editing: Copy the hosts file to your Desktop. You cannot save changes directly in the original folder due to system security. Edit the File:
Right-click the desktop copy and select Open with > Notepad.
Go to the very bottom of the text and add new lines for the SketchUp domains you wish to block.
Format: 0.0.0.0 [domain name] (e.g., 0.0.0.0 licensing.sketchup.com).
Save and Replace: Save the file on your desktop, then drag it back into the original etc folder. Select Replace the file in the destination and provide administrator permission when prompted. Commonly Blocked SketchUp Domains
Users typically target domains related to licensing and telemetry to maintain an offline environment:
Blocking certain server connections in SketchUp via the hosts file
is a common method used to prevent the software from "phoning home" for license checks or unwanted updates. By redirecting specific domain names to a local IP address (like 127.0.0.1 or 0.0.0.0), you effectively cut off the program's ability to communicate with those external servers. Understanding the Hosts File
The hosts file is a plain-text operating system file that maps hostnames to IP addresses. It acts as a local DNS (Domain Name System) that your computer checks before asking the internet. Location on Windows: C:\Windows\System32\drivers\etc\hosts Location on macOS: /private/etc/hosts How to Modify the File (Windows)
Because the hosts file is a system file, you must have administrative privileges to edit and save it. Open Notepad as Administrator
: Search for "Notepad" in the Start menu, right-click it, and select Run as administrator Open the File : In Notepad, go to File > Open . Navigate to C:\Windows\System32\drivers\etc\ . Ensure the file type filter is set to "All Files ( so the extensionless file appears. Add Block Entries
: Scroll to the bottom and add entries using the following syntax: 0.0.0.0 domain-to-block.com Save and Flush DNS
: Save the file. To ensure changes take effect immediately, open a Command Prompt ipconfig /flushdns Domains Often Targeted for Blocking 2026 Issues - SketchUp Forums
To block SketchUp from communicating with its servers for free, you can manually edit your computer's hosts file
. This file acts as a local "address book" that overrides external internet requests, effectively cutting off the application's ability to "call home" for license checks or updates. Step-by-Step: Editing the Hosts File Open Notepad as Administrator Search for in your Start menu. Right-click it and select Run as administrator Locate the File In Notepad, go to File > Open Navigate to: C:\Windows\System32\drivers\etc block sketchup host file free
Change the file type in the bottom-right corner from "Text Documents ( .txt)" to **All Files ( .*)** so you can see the Add Block Entries Scroll to the very bottom of the file. Add the following lines (replace if preferred): 0.0.0.0 sketchup.com 0.0.0.0 www.sketchup.com 0.0.0.0 trimble.com 0.0.0.0 www.trimble.com Save and Close Save the file ( ) and exit Notepad. Why This Method is Used Privacy & Security
: Prevents the software from reporting anonymous usage data or making registry changes during license verification. Connection Stability
: Sometimes used in managed corporate environments to prevent the internal Chromium browser from causing "Bugsplats" or slow startups due to proxy issues. : This is a built-in Windows tool and is entirely free.
: If the block doesn't seem to work immediately, your browser or system may be using DNS-over-HTTPS (DoH)
, which can bypass the hosts file. You may need to disable this in your browser settings. CurrentWare Are you experiencing a specific connection error performance issue in SketchUp that you're trying to resolve? HOSTS File 101: Solid Site Blocking Tool - Dong Knows Tech
Blocking SketchUp domains via the hosts file is a common method for preventing the software from communicating with licensing servers or web tools like the 3D Warehouse. This technique is often used to resolve connection hangs or to force a "checked out" license to remain offline. How to Block SketchUp via Hosts File
To block access, you must redirect specific SketchUp domains to a non-existent local IP address ( ).
Open Notepad as Administrator: Search for Notepad, right-click, and select Run as administrator.
Open the Hosts File: Navigate to C:\Windows\System32\drivers\etc\ and open the file named hosts.
Add the Block Entries: Paste the following lines at the bottom of the file: 0.0.0.0 license1.sketchup.com 0.0.0.0 license2.sketchup.com 0.0.0.0 license3.sketchup.com 0.0.0.0 license4.sketchup.com 0.0.0.0 license5.sketchup.com 0.0.0.0 license6.sketchup.com 0.0.0.0 app.sketchup.com (for web-based tools)
Save and Replace: Save the file. Ensure it does not have a .txt extension. Critical Domains and Ports
If you are blocking to solve "hanging" issues during startup, SketchUp often attempts to reach these specific points:
How to Block SketchUp in Your Hosts File for Free Managing how applications like SketchUp communicate with the internet can be essential for troubleshooting license activation issues, preventing unwanted updates, or securing your local network. One of the most effective and free ways to control these connections is by editing your computer's hosts file. Why Block SketchUp via the Hosts File?
The hosts file acts as a local phonebook for your computer, mapping domain names (like license1.sketchup.com) to specific IP addresses. By redirecting SketchUp's servers to an invalid address (like 0.0.0.0), you can:
Prevent Automatic Updates: Stop the software from checking for new versions without your consent.
Troubleshoot Licensing Errors: Sometimes, blocking specific licensing URLs helps in environments where a proxy or firewall is causing "online" detection issues.
Enhance Privacy: Limit the background data sent to Trimble servers during launch. Step-by-Step Guide: Blocking SketchUp on Windows Blocking SketchUp via the hosts file is a
On Windows 10 and 11, the hosts file is protected and requires administrative privileges to edit. Open Notepad as Administrator: Press the Windows Key and type "Notepad". Right-click it and select Run as administrator. Navigate to the Hosts File: In Notepad, go to File > Open.
Paste this path into the address bar: %SystemRoot%\System32\drivers\etc.
Change the file type dropdown from "Text Documents (.txt)" to **All Files (.*)** to see the hosts file. Add Blocking Entries:
Scroll to the bottom and add the URLs you wish to block, preceded by 0.0.0.0. Common SketchUp Domains to Block: 0.0.0.0 license1.sketchup.com 0.0.0.0 license2.sketchup.com 0.0.0.0 license3.sketchup.com 0.0.0.0 license4.sketchup.com 0.0.0.0 license5.sketchup.com 0.0.0.0 license6.sketchup.com Save and Replace:
Save the file (Ctrl + S). If prompted, ensure you are replacing the original file in the etc folder. How to Block SketchUp on macOS
Open Terminal: Use Spotlight (Cmd + Space) to search for "Terminal". Edit the File: Type sudo nano /etc/hosts and press Enter. Enter your admin password.
Insert Lines: Use the arrow keys to go to the bottom and paste the same 0.0.0.0 entries listed above.
Save: Press Ctrl + O to write the changes, then Enter, and Ctrl + X to exit. Alternative Method: Using Windows Firewall
If the hosts file feels too technical, you can use the built-in Windows Defender Firewall to block the SketchUp.exe file directly.
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FAQs
Additional Resources
127.0.0.1 license.sketchup.com (Space between IP and domain – no "https://" or slashes).hosts (not hosts.txt). In Windows File Explorer, enable "File name extensions" to see the truth.::1 license.sketchup.com (IPv6 equivalent of 127.0.0.1) below your IPv4 rules.Simply saving the file might not take effect immediately. You need to refresh your network settings.
For Windows:
ipconfig /flushdns and press Enter.For Mac:
Ctrl + O, then Enter.Ctrl + X.sudo killall -HUP mDNSResponder and press Enter.Terminal.sudo nano /etc/hostsThis process works on Windows, macOS, and Linux. It is completely free and requires no additional software.
The location depends on your operating system.
For Windows Users:
Notepad.C:\Windows\System32\drivers\etc\hosts and open it.For Mac Users:
sudo nano /private/etc/hosts and press Enter.