Beta Blocker by Isla2D alternative: browser censoring with Serenfix
Isla2D’s Beta Blocker and Serenfix both cover nudity in real time, but they work very differently. Data from their official pages, checked on 21 October 2026.
Updated October 21, 2026
Beta Blocker, Isla2D’s program, is popular in the beta censorship community. It captures your screen and draws boxes over what it detects, in any program. Serenfix censors a different way: inside the browser, image by image. If most of what you want covered is on the web, it may suit you better, and you can try it for free.
Two ways to censor
| Serenfix | Beta Blocker (Isla2D) | |
|---|---|---|
| What it is | Extension for Chrome and Chromium browsers on desktop | Windows program and Android app (Android 14+) |
| How it works | Analyses each image and video on the page and covers them | Captures the screen and draws boxes on top |
| Where it covers | Any website | Any program, outside the browser too |
| Price | Photos free. Video and GIFs: $3.99/month or $40.70/year | One-time: from $19.99 (Windows), from $12.99 (Android), $25 for both |
| Where to get it | Chrome Web Store | itch.io |
| Filters | By body area and by sex, faces included | By body part |
| Extras | Animated words, oval, sensitivity from 50 to 200% | Reverse censoring, export censored videos and photos, OBS virtual camera, multiple monitors |
Why try Serenfix
Start free, with nothing else to install
Serenfix is added to Chrome in two clicks from the official store. Photos on any website are censored for free, with every filter and style, so you can see whether it works for you before paying anything.
Covers right on the image
Because it works inside the page, Serenfix knows where each photo and video is. The censoring moves with them as you scroll, and it doesn’t cover the site’s interface or the video player controls.
Filters by sex and by garment
You can pick each area separately for women and for men, and choose whether underwear gets covered too or only bare skin.
When Beta Blocker is the better pick
- You want censoring outside the browser: games, video players or desktop apps.
- You want to record or export what you see censored, or use it live with OBS.
- You use Android, or prefer a one-time payment over a subscription.
The two aren’t mutually exclusive: some people use Serenfix for browsing and Beta Blocker for the rest of the computer.
Want more options? See the beta censor apps comparison or the comparison with DeniedPixels.
Frequently asked questions
Is there a Beta Blocker alternative that works in the browser?
Yes. Serenfix is an extension for Chrome and Chromium browsers on desktop that censors photos, videos and GIFs on any website, with no separate program to install. Photos are free.
How much does Beta Blocker cost?
On its itch.io page, the Windows version costs from $19.99, the Android version from $12.99 and both together $25, as a one-time payment.
Does Serenfix censor outside the browser?
No. Serenfix works on the pages you open in your browser. To cover games, video players or desktop apps, Beta Blocker, which captures the screen, is the right tool.
Which one uses fewer resources?
An extension only analyses the images and videos on the page you are viewing, while a screen-capture program analyses the whole screen continuously. In general, the extension is lighter.
Do I need Android 14 for Serenfix?
No. Serenfix has no Android app yet: it runs in your desktop browser. Beta Blocker’s Android version does require Android 14 or later.