BlurCast — blur any screen region in real time

Blur any part of your screen — in real time, right where you work.

BlurCast is a Chrome extension. Drag a box over anything on a web page and it is blurred instantly: API keys, emails, customer names, invoice numbers, private messages. Keep working, keep recording — the blur stays put.

Works where other blur tools fail Most blur extensions hook into page elements (the DOM), so they break on canvas-based apps. BlurCast paints the blur on top of the screen, so it works on Google Docs, Notion, Figma, and other canvas apps that competitors simply can't cover.

Survives page refresh Reload the tab and your blurred regions come right back — no need to redraw them every time. Set it once, record as many takes as you want.

Built for real-time screen recording Made for tutorial videos, product demos, screenshots, and live screen sharing on Zoom, Google Meet, Teams, or Loom.

How it works

1. Click the toolbar icon, then "Use on this site."
2. Turn on edit mode and drag to draw a blur region.
3. Drag to move, grab a corner handle to resize, double-click to delete.
4. Press Alt+Shift+B to toggle all blurs on or off.
5. Refresh anytime — your regions are restored automatically.

Pricing One-time purchase of $19 USD. 7-day free trial, no account required. A license key can be activated on up to 3 devices, and you can release a device at any time from the customer portal.

Privacy first — no server, no account BlurCast runs entirely on your own machine. There is no backend, no account and no cloud sync. Your blur positions are saved only in your browser's local storage and are never uploaded. BlurCast asks for permission only on the sites you turn it on.

Known limitations (we would rather be upfront)

• Covers web page content only — not the browser's address bar or other desktop apps.
• Blur cannot cover "top-layer" elements the browser always draws on top, such as native dialog boxes and popovers.
• Blurs are hidden while an element is in native fullscreen, for example a fullscreen video.

Support [email protected]