PRISM — browser extension

Filter the feed on your machine.

Keyword rules hide noise before it loads. Free on YouTube. Pro for six more platforms. No cloud feed.

Install free · See Pro pricing

YouTube free. Six more with Pro.

  • YouTube — Free
  • X / Twitter — Pro
  • LinkedIn — Pro
  • Reddit — Pro
  • Instagram — Pro
  • TikTok — Pro
  • Facebook — Pro

What the extension actually does

  • Keyword rules — block or allow phrases before posts render; rules stay in the browser.
  • Mood profiles — Focus, Relax, Learn, Create, Energize, Open, plus your overrides.
  • Break reminders — optional prompts when a session runs long.
  • Local stats — filter & tab-time counts on device only.
  • Focus schedule — flip a profile on a clock.
  • Pro unlock — same engine on TikTok, Instagram, X, LinkedIn, Reddit, Facebook.

Install, tune, scroll

  1. Install — add Prism (or load unpacked) and open Options once.
  2. Tune — choose a mood profile and add block/allow keywords.
  3. Scroll — browse YouTube; unlock Pro for other sites.

Straight answers

What is Prism?

Prism is a browser extension that filters social media feeds using keyword rules that run locally in your browser. Feed content is not uploaded to Prism servers.

Is Prism free?

Yes. Prism is free on YouTube with mood profiles, custom rules, break reminders, local stats, and focus scheduling. Pro unlocks the same engine on TikTok, Instagram, X, LinkedIn, Reddit, and Facebook.

Does Prism send my feed to the cloud?

No. Filtering runs on your machine. Pro licensing contacts prismfilter.app only for activate, refresh, and billing portal — not for feed content.

Which platforms does Pro include?

Pro adds TikTok, Instagram, X (Twitter), LinkedIn, Reddit, and Facebook on top of free YouTube filtering.

How do I install Prism?

Download the Chrome package from /downloads/prism-extension.zip, unzip, open chrome://extensions, enable Developer mode, and Load unpacked. Install Prism before Pro checkout so the license can auto-activate. Firefox (AMO) is not listed yet.

Does Prism work on Shorts, Reels, or mobile web?

Desktop web feeds are the supported path. Shorts, Reels, and mobile web are best-effort.

Is Prism available in other languages?

v1 ships English UI and English-biased keyword lists. Multilingual support is not claimed yet.

Free owns YouTube. Pro unlocks the rest.

Free: $0/mo — full filtering on YouTube.

Pro: $8/mo or $72/yr ($6/mo) — every supported platform. Cancel any time.

Install on Chrome. Start on YouTube.

Download for Chrome — Load unpacked via chrome://extensions (Developer mode). Shorts / Reels / mobile web are best-effort. Firefox AMO listing is not live yet.