PRISM — browser extension

Filter the feed on your machine.

Keyword rules hide matching posts in the feed. 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 in the feed after cards appear; rules stay on your machine.
  • 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 keyword engine on TikTok, Instagram, X, LinkedIn, Reddit, Facebook. Structural hides are best-effort on some sites.

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 keyword engine on TikTok, Instagram, X, LinkedIn, Reddit, and Facebook. New Pro subscribers get a 7-day trial (card required; charged after the trial unless you cancel). Structural hides are best-effort on some sites.

How does the Pro trial work?

First-time Pro checkout gets 7 days free. Stripe saves your card; you are charged only if you stay after the trial. One trial per person — if that email (including common Gmail aliases) already used a Prism trial or subscription, checkout goes straight to paid. Cancel any time from the billing portal.

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?

See the install guide for the Chrome package and Load unpacked steps. 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: 7-day trial for new subscribers, then $8/mo or $72/yr ($6/mo) — every supported platform. Card required at checkout; cancel any time before the trial ends to avoid a charge.

Install on Chrome. Start on YouTube.

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