How to block YouTube on Chrome
Add youtube.com to the list and pick your hours. It stays shut during work and opens in the evening, without you deciding again each time.
Block Sites
Block websites that eat your day
Keep a hundred sites shut — permanently, or only between nine and six. Set a password, and “just five minutes” stops being an option.
Everything you meant to do
…and the tab that ate the hour
youtube.com
This site is blocked
You asked to keep this one closed until 18:00.
25:00
Focus session
Distracting sites stay shut while the timer runs.
Counted on your device
Nothing about this visit left your browser.
Time to wind down
Breathe with the circle until the screen lets go.
Rain over the page
Ambient sound, nothing blocked.
Look 20 feet away
Twenty seconds. Your eyes have been at this screen for two hours.
Three things today
Written this morning, still waiting.
Today you are the Learner
Every tab is a vote for who you are becoming.
Dark, without the mess
Images keep their colours. Already-dark sites are left alone.
25 on, 5 off
The rhythm runs itself; you stop watching the clock.
Warm after sunset
The page warms up in the evening instead of glowing at you.
Two minutes
In, hold, out — follow the circle and go back to work.
NUFF.WORK
on
click the toggle — this is the real interface, not a screenshot
You did not decide to open that tab. Your hand did it while you were thinking about something else.
How it works
Three steps, then you forget it exists
The point of a blocker is that you stop having to fight it every day.
01
Name the sites
Add up to a hundred of them on the free plan. Or flip it around: allow a handful and shut everything else.
02
Say when
Around the clock, or only during work hours, study blocks and the last two hours before bed.
03
Lock it
Set a password. Weakening a rule then costs more effort than sitting through the urge.
What you get
What the blocker actually does
A hundred sites, free
Not three. Most blockers stop you at a handful and ask for money.
free
Schedules, not just on and off
Different rules for work hours and for the evening.
free
Allowlist mode
Shut the whole web except the few pages you actually need.
free
Password protection
The lock holds against your own impulse, not just against strangers.
free
The overlay cannot be wished away
A page cannot hide the block screen with its own styles to unblock itself.
free
Common cases
What people block first
Blocking social media during work hours
Instagram, X, TikTok and Reddit on one schedule, nine to six. Weekends can have their own rules.
Block everything except a few sites
Allowlist mode shuts the whole web and keeps open only what you named — the strictest setting here.
A blocker you cannot talk your way out of
Set a password. Weakening or deleting a rule then requires it, so the calm decision outranks the 11pm one.
Blocking adult sites permanently
Add them once, around the clock, with a password. Nothing needs to be reviewed again.
Why the block screen cannot be hidden
A page cannot make the overlay transparent with its own styles. We found that hole in our own code and closed it.
What the blocker knows about you
Your blocklist lives in your browser. The extension does not send us the sites you blocked, and it does not report which pages you tried to open. For comparison: BlockSite declares collection of your web history in its own Chrome Web Store listing, and its privacy policy states it may sell or share network activity data with advertising networks.
See how we compareQuestions
About Block Sites
How many sites can I block for free?
Up to a hundred, with schedules and password protection included. No card, no time limit.
Can I block a site only during certain hours?
Yes. You can set time ranges, including ones that cross midnight, and different rules for different days.
What stops me from just unblocking it?
A password. With it set, weakening or removing a rule requires the password, so the decision you made calmly outranks the decision you make at 11pm.
Can a website get around the block?
The block overlay is protected against pages that try to hide it with their own CSS. We found and closed that hole ourselves: a site could previously make the overlay nearly transparent.
Eleven more modes come with it
Focus sessions, screen time, dark mode, sleep, eye exercises — all free, all on your device.
Add to Chrome — free