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Block Distracting Websites & Stay Focused

Blocklists, schedules and focus sessions. Everything that actually blocks is free forever, and nothing you browse leaves your device.

Add to Chrome, it's free Add to Brave, it's free Add to Edge, it's free Add to Opera, it's free Add to Firefox, it's free Add to Zen, it's free

Free: every blocking feature, no site limit Pro $49.99 once

Free · Chrome & Firefox · Zero data 8,000+ users on Chrome and Firefox
Also available on

You don't need to quit YouTube. You need to quit Shorts.

You need YouTube for work and Instagram for messages. You don't need the part engineered to keep you scrolling. Switch off one section and the rest of the site keeps working, buttons and thumbnails included, so it isn't dangled in front of you.

Free for everyone, on every plan.

See every blocking feature

TikTok and X get their For You feeds hidden rather than blocked: neither has an address that separates the feed from the rest of the site.

Three steps to a focused day.

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

  1. Added

    Install in one click. Add SiteBlocker to Chrome, Firefox, Brave, Edge, Opera, or Zen. No account required, so blocking starts immediately.

  2. X twitter.com
    Work
    R reddit.com
    Study
    9:00 to 17:00 · Mon-Fri

    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.

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

    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.

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

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.

Your Blocklists
3 lists
Work Focus
8 sites
Study Mode
5 sites
Wind Down
3 sites
+ New list

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.

Work Focus schedule
M
T
W
T
F
S
S
Start
09:00
→
End
17:00
facebook.comblocked
twitter.comblocked
reddit.comblocked

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, with no daily willpower required.

Privacy dashboard
Zero data collected
Your browsing activity is never tracked
Browsing data collectedNone
Third-party trackingNone
Data sold to advertisersNever
Account requiredOptional

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.

The free tier isn't the demo.

No site cap, no session cap, no nag. Pro adds locked mode and the rest, and never gates the thing you installed this for.

Blocker Free tier Paid
SiteBlocker Free: every blocking feature, no site limit Pro $49.99 once
BlockSite compare Free, capped at 3 blocked sites $14.99/mo · $29.99/yr · $49.99 lifetime (frequent promos, region-varying)
Freedom compare Free, but sessions are capped (no scheduling, no locked mode) $8.99/mo · about $39.96/yr · $99.50 lifetime

Competitor pricing checked 2026-07-04. Both run frequent promotions, so their headline figures move.

Focus, available everywhere.

One account carries your blocklists, schedules and focus history across every browser you sign into.

0+
Users on Chrome Web Store View on store
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Languages supported
  • English
  • Español
  • Português
  • Français
  • Deutsch
  • Română
  • 日本語
  • 한국어

Pricing Plan

Every blocking feature is on the free plan. Pro adds the parts that hold you to it, and the dashboard that shows whether it worked.

Free

Everything you need to block distractions: whole sites or just the distracting section, custom blocklists, scheduling, focus mode, and cross-device sync

$0 / forever
Get SiteBlocker

Get started with:

  • One-click website blocking
  • Section blocking (Shorts, Reels, For You feeds)
  • Multiple customizable blocklists
  • Curated blocklist marketplace
  • Smart scheduling
  • Focus Mode with Pomodoro timer
  • Whitelist mode
  • Cross-device sync
  • Dark mode
  • Chrome & Firefox
  • Basic insights (total blocks, streak, top 3 sites)
Pay once

Pro Lifetime

Pay once, own it forever. Locked Mode, daily time budgets, calendar triggers, keyword blocking and the full insights dashboard, with no recurring fees.

$49.99 / once
Get Lifetime Access

Includes:

  • Everything in Free
  • Keyword blocking (URL, title & content)
  • Locked Mode focus sessions
  • Daily time budgets per site
  • Calendar-triggered blocking
  • Weekly activity charts
  • Top blocked sites breakdown
  • Focus session analytics
  • Hourly distraction heatmap
  • 90-day data retention
  • One-time payment, no subscription
  • All future updates included

Frequently Asked Questions

What is SiteBlocker?
SiteBlocker is a Browser extension that helps you block distracting websites, stay focused, and improve productivity by controlling your browsing habits.
How do I block a website?
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.
Can I block YouTube Shorts without blocking YouTube?
Yes, and it is free. Turn on the YouTube Shorts section in your block list and leave youtube.com off it. Shorts pages stop opening, the Shorts shelf and sidebar button disappear, and normal videos, subscriptions and search are untouched.
Which parts of a site can I block on their own?
Six, all free. YouTube Shorts, Instagram Reels, Reddit r/popular and Facebook Reels are blocked by address, and their buttons and thumbnails are hidden so nothing tempts you. The TikTok and X For You feeds are hidden rather than blocked: each one is the site default rather than a separate page, so it can still be reached. Sections can follow the same schedule as the rest of your block list.
Will SiteBlocker track my browsing data?
No. SiteBlocker prioritizes your privacy and does not collect or store any personal browsing data.
Can I schedule website blocking?
Yes! SiteBlocker allows you to set specific time periods when certain lists are blocked, helping you stay productive during work or study hours.
Is SiteBlocker free to use?
Yes, SiteBlocker is free. All core features (custom blocklists, section blocking, scheduling, Focus Mode, whitelist mode, and cross-device sync) are available at no cost. The optional Pro plan ($49.99 once) adds Locked Mode, daily time budgets, calendar-triggered blocking, keyword blocking, and the full analytics dashboard.
Does SiteBlocker work in incognito mode?
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).
How is SiteBlocker different from BlockSite or Freedom?
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.
What is Focus Mode?
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.
What is the Pro plan?
The Pro plan ($49.99 once, yours for life) adds Locked Mode focus sessions you cannot quit early, daily time budgets per site, calendar-triggered blocking, keyword blocking (block pages containing specific words in URLs, titles, or page content), and a full analytics dashboard covering weekly activity charts, top blocked sites, hourly distraction heatmaps, and focus session tracking. Basic stats (total blocks, streak, top 3 sites) are free for everyone.
What is keyword blocking?
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.
Which browsers does SiteBlocker support?
SiteBlocker is available on Chrome and Firefox. Your blocklists and settings sync across browsers when you sign in.
How do I uninstall SiteBlocker?
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.

Get SiteBlocker
Join the 8,000+ people who have stopped losing hours to mindless browsing. SiteBlocker works on Chrome and Firefox, with no account required and no data collected.