Thaumic Cast icon

Thaumic Cast

by Brew Studio Pte. · Tools
Manifest V3 Free
View in Chrome Web Store Data as of 18 Oct 2026

Cast tab audio to Sonos over your local network. Self-hosted, fast, private. Requires the Thaumic Cast desktop app or server.

Users
142
−1 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#74K
#62K among extensions
Version
0.12.0
updated 21 Apr 2026

Users

monthly, 9 months
074149Jan 2026Jun 2026Oct 2026
Latest, 18 Oct 2026: 142 usersMove the mouse over the chart for any month

Ratings count

monthly, 9 months
001Jan 2026Jun 2026Oct 2026
Latest, 18 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Thaumic Cast

Thaumic Cast streams audio from a browser tab to your Sonos speakers over your local network. It is self-hosted, which means it runs on your machine and stays on your network. No accounts. No cloud. Just sound going where you told it to. This extension is one half of the system: - The extension captures audio from a browser tab. - The Thaumic Cast Desktop app (or headless server) running on the same computer receives it and streams it to Sonos. Getting started: 1. Download and run the Thaumic Cast Desktop app (or headless server) from the latest release: https://github.com/brew-lab/thaumic-cast/releases/latest 2. Install this extension. 3. Click the extension, pick a Sonos group, and start streaming. Notes: - The extension connects to your local Thaumic Cast server on http://localhost:49400 (it may use ports 49400 to 49410). - If you use a firewall, allow 49400 to 49410 over TCP. Permissions: - Tab capture: required to capture audio from the tab you choose. - Tabs: required to identify and manage the tab you are streaming. - Storage: saves settings like your preferred server port. - Power: helps keep streaming stable during long playback. - Host access to localhost: used to talk to the local Thaumic Cast companion app. Project and support: https://github.com/brew-lab/thaumic-cast Trademark note: Sonos is a trademark of Sonos, Inc. This project is not affiliated with Sonos.

Growth

WindowUsersChangeRatingsRating
7 days−6−4.1%00.00
30 days−1−0.7%00.00
6 months+87+158.2%00.00

Version history

2 versions recorded
0.12.021 Apr 2026
0.11.025 Jan 2026

Details

Category
Tools
First seen
25 Jan 2026
Size
190 KB
Languages
en
Pricing
Free
Privacy policy
github.com
Support
github.com
Extension ID
hpemmkbecklfacogdidaoncjmfadgedm

Permissions and risk

Moderate riskimpact 2, likelihood 2
Permissions
tabCaptureoffscreenstorageactiveTabpower
Site access
http://localhost/*

Alternatives to Thaumic Cast

Extensions that rank for the same store searches or share the Tools category, ordered by users