New Signal Update for Windows Prevents Screenshot Capture of Chats

Signal Strengthens Privacy on Windows by Blocking Screenshots

Signal, the messaging app known for its strong privacy and security, has rolled out a new update for its Windows desktop version. With this update, Windows can no longer capture screenshots of chat windows within the app.

This feature has been available on mobile platforms (Android and iOS) and now extends to the desktop environment, addressing growing concerns about data security on PCs.

What Changes with the New Signal Update for Windows?

The main highlight is the automatic blocking of screenshots in chat windows. Any attempt to use Windows tools like "Print Screen," "Snipping Tool," or third-party apps will result in a blank or blacked-out area where chats are displayed.

This mirrors the mobile version's behavior, preventing sensitive information from being recorded intentionally or accidentally.

How Does Screenshot Protection Work?

Signal uses a software-based protection layer that prevents the chat window's content from being rendered for capture by the operating system or external applications. It leverages specific Windows APIs designed to restrict screen capture of certain windows.

When enabled, any screenshot attempt will produce a blacked-out area where the chat content would normally appear, while other UI elements like menus may remain visible.

Why Is This Important?

In an era of increasing digital threats, protecting sensitive data is crucial. Screenshots are a simple yet powerful way to extract private information such as:

• Addresses

• Bank details

• Temporary passwords

• Confidential conversations

• Corporate information

Blocking screenshots adds an extra layer of protection, especially in workplaces or public spaces where unauthorized data sharing can lead to serious risks.

How to Enable Screenshot Blocking in Signal for Windows?

The feature is enabled by default in the latest update. However, users can manually check or change this setting by following these steps:

1. Open Signal on Windows.

2. Click your profile picture in the top-left corner.

3. Go to "Settings."

4. Navigate to "Privacy."

5. Enable or disable "Screen Security" (Block screenshots).

This applies to the main chat window and message previews.

Does It Affect Performance?

According to Signal, enabling screenshot blocking does not affect the app's performance. It only impacts how the window is rendered for screen capture tools, without interfering with messaging, calls, or other features.

Comparison: Signal vs. Other Messengers

Photo by Clint Patterson on Unsplash

Signal leads in desktop screenshot protection, reinforcing its role as the top privacy-focused messaging platform.

Privacy at the Core

This new feature highlights Signal's continued focus on privacy. With constant headlines about data breaches and digital spying, more users are looking for platforms that prioritize security.

In addition to screenshot blocking, Signal also offers:

• End-to-end encryption for all messages and calls.

• Disappearing messages.

• Mobile screenshot blocking.

• Notification preview protection.

• No data collection for advertising.

Limitations

While effective against digital screenshots, this feature cannot prevent someone from physically photographing the screen with another device. It complements—but does not replace—safe data-sharing practices.

Availability

The screenshot blocking feature is available in the latest Signal for Windows update released on May 21, 2025. Users can update manually or wait for the automatic update.

What’s Next for Signal?

Signal plans to continue enhancing privacy features, including improvements to encrypted video calls, larger group optimizations, and more media privacy controls in upcoming updates.

Conclusion

The introduction of screenshot blocking in Signal for Windows marks a significant step in digital security. Extending this mobile feature to desktop reinforces Signal’s position as the most privacy-respecting communication platform available today.

Source: Signal Official Blog

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