SiteBlocker — Free Website Blocker for Chrome & Firefox
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Free · Chrome & Firefox · Zero data

Block Distracting Websites & Stay Focused with SiteBlocker

SiteBlocker is a free browser extension for Chrome and Firefox that blocks distracting websites, so you can focus on what actually matters. Set up custom blocklists, schedule when sites are blocked, start focus sessions, and sync across devices — all without giving up your data.

Get Started for Free
1,000+ users on Chrome Web Store 8 languages
Also available on
Xtwitter.com
https://twitter.com

This site is blocked

twitter.com

Deep Workuntil 5:00 PM
SiteBlocker
47m saved today
Why SiteBlocker

Elevate your productivity

01

Complete Control

Block time-wasting sites so you actually finish what you set out to do — no more "just five minutes" turning into an hour.

02

Privacy First

Unlike other blockers that track your browsing habits, SiteBlocker collects zero data. Your focus is your business, not ours.

03

Customizable & Flexible

Create separate blocklists for work, study, and downtime — one click to switch between them whenever you need to.

How it works

Three steps to a focused day.

No accounts, no setup wizards, no friction. Install, decide what to block, and get back to work.

  1. Step 01

    Install in one click

    Add SiteBlocker to Chrome, Firefox, Brave, Edge, Opera, or Zen. No account required — start blocking immediately.

    Added
  2. Step 02

    Pick what to block, and when

    Build blocklists for work, study, or downtime. Schedule social media off during work hours, or block everything except your essentials with whitelist mode.

    X twitter.com
    Work
    R reddit.com
    Study
    9:00 — 17:00 · Mon–Fri
  3. Step 03

    Stay in flow

    Start a focus session with a Pomodoro timer, or let your schedules run quietly in the background. SiteBlocker handles the discipline so you don't have to.

    24:13
    Focus session Deep Work 3 sites blocked · 2 allowed
Take control

Take Control of Your Online Focus

‘Other blockers charge for basic features or harvest your data. SiteBlocker gives you everything for free, with zero tracking.’

facebook.com

This site is blocked

facebook.com is on your blocked list

Go Back
  • 01

    Website Blocking Made Easy

    ‘Add any site to your blocklist with one click. When you try to visit it, SiteBlocker redirects you to a focus page instead — so that "quick check" on social media never turns into a lost hour.’

  • 02

    Customizable Blocklists

    ‘Create a "Work" list that blocks social media, a "Study" list that blocks gaming sites, and a "Wind Down" list for evenings. Switch between them in one click depending on what you are doing.’

  • 03

    Smart Scheduling

    ‘Block social media from 9 to 5 on weekdays, but leave everything open on weekends. Set it once, and SiteBlocker handles the rest automatically — no daily willpower required.’

  • 04

    Privacy & Security First

    ‘Unlike BlockSite and other popular blockers that collect browsing data, SiteBlocker stores nothing. Your blocklists sync through your account, but your browsing activity is never tracked or shared.’
Built for everyone

Focus, available everywhere.

0 +

Users on Chrome Web Store

View on store
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  • English
  • Español
  • Português
  • Français
  • Deutsch
  • Română
  • 日本語
  • 한국어

Languages supported

Pricing

Pricing Plan

Stay focused and eliminate distractions with SiteBlocker. Take control of your browsing habits and boost productivity—no hassle, just results.

Save up to 30% yearly

Free

Everything you need to block distractions — custom blocklists, scheduling, focus mode, and cross-device sync

$0 / month
Get Started

Get started with:

  • One-click website blocking
  • Multiple customizable blocklists
  • Smart scheduling
  • Focus Mode with Pomodoro timer
  • Whitelist mode
  • Cross-device sync
  • Dark mode
  • Chrome & Firefox
  • Basic insights (total blocks, streak, top 3 sites)
New

Insights Pro

Full analytics dashboard — weekly trends, hourly heatmap, focus session tracking, and cross-device insights sync

$ 2.99 / month
Upgrade to Pro

Includes:

  • Everything in Free
  • Keyword blocking (URL, title & content)
  • Weekly activity charts
  • Top blocked sites breakdown
  • Focus session analytics
  • Hourly distraction heatmap
  • Cross-device insights sync
  • 90-day data retention
Best Value

Lifetime

Pay once, own it forever — all Pro features with no recurring fees

$ 49.99 /once
Get Lifetime Access

Includes:

  • Everything in Pro
  • One-time payment
  • All future updates included
  • No subscription needed
FAQ

Frequently Asked Questions

SiteBlocker is a Browser extension that helps you block distracting websites, stay focused, and improve productivity by controlling your browsing habits.
Simply add the website URL to your blocklist in the list. Once added, the site will be inaccessible until you remove it from the list or disable the list.
No. SiteBlocker prioritizes your privacy and does not collect or store any personal browsing data.
Yes! SiteBlocker allows you to set specific time periods when certain lists are blocked, helping you stay productive during work or study hours.
‘Yes, SiteBlocker is free. All core features — custom blocklists, scheduling, Focus Mode, whitelist mode, and cross-device sync — are available at no cost. The optional Insights Pro plan ($2.99/month) adds detailed analytics charts, hourly heatmaps, and focus session tracking.’
‘Yes, but you need to enable it manually. Go to your browser Extensions page, find SiteBlocker, and check the "Allow in Incognito" option (Chrome) or "Run in Private Windows" (Firefox).’
SiteBlocker includes all core features for free — custom blocklists, scheduled blocking, Focus Mode with Pomodoro, whitelist mode, and cross-device sync. BlockSite limits free users to 3 blocked sites and charges $39.99 for full access. Freedom costs $8.99/month. SiteBlocker also collects zero browsing data, unlike both competitors.
Focus Mode lets you start on-demand distraction-blocking sessions. Pick a duration (25 minutes, 45 minutes, 1 hour, or custom), choose which blocklists to enforce, and optionally enable Pomodoro breaks. During a focus session, your selected sites are blocked regardless of your schedule settings.
The Pro plan ($2.99/month, $24.99/year, or $49.99 lifetime) adds keyword blocking (block pages containing specific words in URLs, titles, or page content) and a full analytics dashboard — weekly activity charts, top blocked sites, hourly distraction heatmaps, focus session tracking, and cross-device insights sync. Basic stats (total blocks, streak, top 3 sites) are free for everyone.
Keyword blocking (Pro feature) lets you block any page that contains specific words — in the URL, page title, or page content. For example, add "gambling" as a keyword and any page with that word gets blocked automatically, even if the domain is not on your blocklist. URL and title keywords are checked instantly; page content is scanned after the page loads.
SiteBlocker is available on Chrome and Firefox. Your blocklists and settings sync across browsers when you sign in.
Go to the Extensions page, find SiteBlocker, and click "Remove." You can always reinstall it from the Chrome Web Store or Firefox Add-ons.
Ready to take back your time?

Install in Seconds. Free Forever.

Join thousands of people who have stopped losing hours to mindless browsing. SiteBlocker works on Chrome and Firefox — no account required, no data collected.

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