How to Blur Your Screen in Webex (Camera Background vs. Hiding Shared Content)

Webex's built-in blur only blurs your camera background — it does nothing to the screen or window you share. To hide sensitive content while sharing in Webex, blur it inside the browser tab with an extension before you present. Because BlurFirst paints the blur into the page as real pixels, Webex captures — and records — the blurred version, not the original.

This is a common mix-up: the "Blur my background" toggle in Webex is a webcam effect for your video tile, and people assume it also protects a screen share. It doesn't. The two are entirely separate, and only an in-page blur controls what your shared content looks like.

Webex's blur is for your camera, not your screen

In Webex, "Blur my background" and virtual backgrounds apply only to the video coming from your webcam — they soften the room behind you. When you click Share content and pick a screen, window or browser tab, Webex sends those pixels exactly as they appear on your machine. There is no Webex control that selectively hides a field, column or message inside the thing you're sharing. So the salary in your spreadsheet, the customer record in your CRM tab, or the API key in your dashboard is fully visible to everyone on the call.

How to actually hide content while sharing in Webex

The reliable approach is to share a single browser tab and blur the sensitive parts of that page in advance. Here's the full flow:

1. 1

   Install BlurFirst

   Add BlurFirst from the Chrome Web Store (it also runs on Edge, Brave, Vivaldi and Opera) and pin it to your toolbar.

2. 2

   Blur the page before you share

   Open the page you'll present, press Ctrl/⌘ ⇧ Y, then drag a box over a region, click a single element to hide just that field, or run Scan to auto-detect emails, phone numbers, card numbers, SSNs and API keys in one click.

3. 3

   Share a single window or tab, not your whole screen

   In Webex's Share content picker, choose the specific application window or browser tab. This keeps your other tabs, apps and desktop out of the feed — the single most important sharing habit.

4. 4

   Present, with panic ready

   Start the share. Because the blur is real pixels in the page, Webex only ever transmits the blurred version. If something unexpected loads, press Ctrl/⌘ ⇧ H to blur the whole page instantly.

Camera-background blur vs. in-page content blur

Honest limitation: an in-page blur only covers content inside a browser tab — not native desktop apps, other windows or your whole desktop. If the thing you need to share in Webex is a native application, you'd need a desktop tool (BlurFirst's is in development). For anything you present from a browser — dashboards, spreadsheets, CRMs, docs — an in-page blur is the dependable fix.