Most screen privacy tools focus on pixels. They hide the window content from capture and declare victory. But the window title — visible in the taskbar, Alt-Tab switcher, and window enumeration APIs — can leak as much information as the window itself.
A title like "Slack — Recruiter: Offer letter" tells a story. "Notion — [Competitor] Weaknesses" tells another. "1Password — AWS Root Console" tells a third. These titles are visible to capture even when the window content is cloaked, because Windows exposes them through separate APIs that WDA_EXCLUDEFROMCAPTURE does not touch.
How Window Titles Leak
When you Alt-Tab during a screen share, the switcher renders thumbnails and titles of all running applications. If you are sharing your desktop, the audience sees this switcher. Even if the window content is blacked out, the title is readable.
The taskbar behaves the same way. Hovering over an icon shows the window title. Screen recording software that captures the taskbar captures this metadata.
Some conferencing tools also enumerate windows for their own UI. Zoom's share menu lists available windows by title. Teams does the same. These enumerations are visible to anyone with screen access.
What Title Masking Does
Title masking replaces the real window title with a generic placeholder before it reaches the capture stream and the OS shell. "Slack — Recruiter: Offer letter" becomes "Untitled Application." The change is visible in:
- The taskbar
- The Alt-Tab switcher
- Window enumeration APIs
- DWM thumbnail previews
The app itself is unaffected. You still see the real title in the window chrome. The mask only applies to the metadata surfaces that capture tools and observers can read.
Why Most Tools Don't Do This
Evanesco, CaptureGuard, and WinHider do not offer title masking. They operate at the SetWindowDisplayAffinity layer, which controls pixel visibility. Title masking requires additional manipulation of window properties and sometimes shell integration. It is more complex than simple cloaking and more fragile across Windows versions.
NoCapture handles this through a dedicated title-masking engine that rewrites window text properties while preserving the internal application state. This is why it is a feature in the Pro tier and not in the free tools.
When Title Masking Matters Most
Title masking is critical in scenarios where you must switch applications during a share:
- Client presentations. Switching from a deck to a browser to a spreadsheet. The Alt-Tab switcher is visible to everyone.
- Negotiations. A tab titled "[VC Firm] — Weaknesses and Leverage Points" destroys leverage in two seconds.
- Incident response. Switching between logs, terminal, and documentation. Titles reveal infrastructure details.
- Streaming. Alt-Tabbing between game and chat. Titles reveal personal conversations.
We documented a $15 million negotiation leak caused by a visible tab title here.
How to Enable Title Masking in NoCapture
- Select the window you want to protect
- Enable Cloak
- Enable Title Mask
- The live preview will show you exactly how the title appears in taskbar and Alt-Tab
- Verify before sharing
You can also save this configuration in a routine so title masking applies automatically.
The Limitation
Title masking does not change the internal process name or the executable path. A determined attacker with system-level access can still identify the running process. Title masking protects against screen capture and casual observation. It does not provide process-level anonymity against forensic analysis.
We wrote about the three layers of privacy here. Title masking is layer two: metadata protection.
NoCapture provides OS-level window cloaking, title masking, and notification shielding for Windows. Free for two windows. Because "being careful" isn't a strategy.
