How to Edit Hosts File with PowerToys on Windows 11

Why use the Hosts File Editor?

The hosts file acts like a private phonebook. It links website names like “example.com” to specific internet addresses like “127.0.0.1”.

It is a plain text file that has been part of Windows for a very long time. Each line holds one IP address followed by one or more names. Windows reads the file whenever it needs to turn a name into an address.

Two common uses are:

• Blocking a sitepoint the domain at 127.0.0.1, which is your own PC. The site then fails to load.
• Testing a sitepoint a domain at a new server’s IP address before the public DNS records change. You see the new server while everyone else still sees the old one.

What happens when you finish?

Once you save an entry, your computer immediately updates its network behavior. Your browser will then use your custom mapping instead of asking the public DNS. This means you can redirect traffic instantly without waiting for global DNS propagation.

The change only affects this PC. Other devices on your network are not touched. It also applies to every program on the machine that uses Windows name resolution, not just one browser.

If a site still opens the old way after you save, the browser may be holding a cached answer. Close the browser completely and open it again. Some browsers also have a secure DNS setting that can skip the hosts file, so check that if the problem continues.

How to Install PowerToys

To get started, download the installer from the official Microsoft PowerToys website. Run the installer and follow the on-screen prompts. Once finished, you will have a suite of tools to manage your Windows system more effectively.

Check that you have version 0.65 or newer. Older builds do not include the Hosts File Editor. If you already have PowerToys, open it and look for an update notice on the General page. Installing the latest release over the old one keeps your settings.

How to Use the Hosts File Editor

You can edit the hosts file with PowerToys to block websites or redirect web traffic without messing with text files. Open Microsoft PowerToys and go to the Hosts File Editor tool. Make sure you run the app as an administrator so Windows lets you save your changes.

The steps below cover the whole job. Each one is explained in the sections that follow.

1. Open PowerToys and select Hosts File Editor in the left-hand list.
2. Turn on the tool and the administrator option.
3. Launch the editor and add your entry.
4. Save it, and test the result.

You must turn on "Launch as administrator" in the settings for PowerToys. This action is crucial because the hosts file is a protected Windows system file. Without administrator rights, you cannot save any changes you make to the hosts file.

1. Open PowerToys from the Start menu ⊞ or the system tray 🔔. The settings ⚙️ window opens.
2. Click Hosts File Editor in the left-hand list.
3. Switch on the Enable Hosts File Editor toggle if it is off.
4. Switch on Launch as administrator. Windows may show a User Account Control prompt the next time you open the editor. Click Yes.

If the option is greyed out, the tool is probably not enabled yet. Turn on the main toggle first. You need an administrator account on this PC to approve the prompt.

After enabling, click Launch Host File Editor. To add a new entry, click the New entry button.

1. On the Hosts File Editor page in PowerToys, click Launch Host File Editor. The editor opens in its own window and lists the entries already in your file.
2. Click the New entry button. A panel opens with empty fields for the address and the host names.

If the editor shows a read-only message or a warning about permissions, close it and check that Launch as administrator is on.

Enter the IP address, such as 127.0.0.1 (the loopback address), and the domain name you wish to map. Click Add to save your changes.

1. Type the IP address in the address field. Use 127.0.0.1 to block a site, or the server’s real IP address to redirect it.
2. Type the domain name in the host field, for example example.com. If you also want to cover www.example.com, add that name as well, because each name is matched separately.
3. Add a short note in the comment field if you like. It helps you remember later why the entry exists.
4. Click Add. The new entry appears in the list and is saved to the hosts file.

Each entry has an on/off toggle. Switch it off to disable the mapping without deleting it. That is useful for a temporary test.

You can copy the file from 📁C:\Windows\System32\drivers\etc\hostscopy to a safe folder on your desktop as a precaution.

The file has no extension, so it may look odd in File Explorer. Copy it and paste it into your chosen folder. Windows may ask for administrator permission to read or copy it. To restore it, copy your backup over the original and approve the prompt.

Troubleshooting and Permissions

If you cannot save changes, ensure you have enabled the Launch as administrator setting. If the file is locked by another program, close your browser and try again. If you make a mistake, you can delete the entry in the PowerToys interface to undo the changes.

• Save failsturn on Launch as administrator, close the editor, and open it again.
• File lockedanother program, often a browser or security tool, may be holding the file. Close it and try again. Some security software also protects the hosts file and will block changes until you allow them in its settings.
• Change has no effectrestart your browser, and check that the entry is switched on and the domain is spelled correctly.
• Undo a mistakedelete the entry in the editor, or restore the backup you made earlier.

Summary

The PowerToys Hosts File Editor simplifies the process of managing domain mappings. By using this tool, you avoid risky manual edits to system files. It is the safest way to handle local development environments, block domains, or redirect traffic on your Windows 11 machine.