u/Due-Programmer8538

I’ve been working remotely from coffee shops and co-working spaces a lot lately, and I’ve become really conscious of people glancing at my screen. Whether it’s Slack messages, personal emails, or even just what I’m reading on Claude, I wanted a quick way to hide everything without closing tabs or logging out.

At the same time, I wanted a simple way to lock distracting websites locally (like social media) so I’m not tempted during deep work — without installing heavy extensions that phone home.

So I spent some time building a tiny Chrome extension that does two things:

• Blurs all chat and message content on any site (Gmail, WhatsApp, Slack, Claude, etc.). You select text to read it, hover to peek, or toggle with Alt+B.
• Lets you lock any website behind a locally hashed password — great for blocking distractions.

It makes zero network calls, collects no data, and is under 200KB with no dependencies. Everything stays on your machine.

It’s called MacShield — Privacy Lock & Blur. You can find it here if you’re curious:
https://chromewebstore.google.com/detail/kmbnlglonjoogajghclgeibhooabijie

I’d love to hear how others deal with screen privacy in public, or if you’ve tried similar tools. Any feedback on the approach or the extension itself is hugely welcome — I’m still iterating.

I’ve been working remotely from coffee shops and co-working spaces a lot lately, and I’ve become really conscious of people glancing at my screen. Whether it’s Slack messages, personal emails, or even just what I’m reading on Claude, I wanted a quick way to hide everything without closing tabs or logging out.

At the same time, I wanted a simple way to lock distracting websites locally (like social media) so I’m not tempted during deep work - without installing heavy extensions that phone home.

So I spent some time building a tiny Chrome extension that does two things:

• Blurs all chat and message content on any site (Gmail, WhatsApp, Slack, Claude, etc.). You select text to read it, hover to peek, or toggle with Alt+B.
• Lets you lock any website behind a locally hashed password - great for blocking distractions.

It makes zero network calls, collects no data, and is under 200KB with no dependencies. Everything stays on your machine.

It’s called MacShield — Privacy Lock & Blur. You can find it here if you’re curious:
https://chromewebstore.google.com/detail/kmbnlglonjoogajghclgeibhooabijie

I’d love to hear how others deal with screen privacy in public, or if you’ve tried similar tools. Any feedback on the approach or the extension itself is hugely welcome - I’m still iterating.

[Founder here]

What it does:
— Blurs all messages and chats on screen (Gmail, Slack, WhatsApp, Claude, etc.)
— You select text to read it, hover to peek, Alt+B to toggle
— Also lets you lock any website behind a local password great for blocking social media

What I'm proud of:
— Zero data collection, zero network calls
— Passwords hashed and stored locally only
— Under 200KB, no dependencies