SiteBlocker

What SiteBlocker does

SiteBlocker is a browser extension for Chrome and Firefox that makes a distracting site simply not open. You build blocklists for work, study or downtime, schedule them for set hours and days, or switch to whitelist mode and allow only what you need. A focus session runs a Pomodoro timer in the popup, round by round, and the moment it starts it blocks listed sites that are already open. It can also block one section of a site and leave the rest working: YouTube Shorts, Instagram Reels and Reddit's r/popular go while YouTube, Instagram and Reddit keep working, and the For You feeds on TikTok and X are hidden. Keyword rules match a page's address, title or text, Vacation Mode pauses blocking for up to 30 days and then resumes by itself, and Insights shows where the time went. Everything that blocks is free, with no cap on sites, and nothing you browse leaves your device unless you turn on sync. The extension is built with WXT and React and ships in 8 languages, behind a NestJS API with Better Auth and PostgreSQL; the website is Astro on Cloudflare Workers. It started as a small extension that had 300 users in 2022 and now has more than 8,000.

Features

• ·Blocklists on a schedule by hour and day, plus a whitelist mode
• ·Pomodoro focus sessions that also block listed sites already open in a tab
• ·Blocks YouTube Shorts, Instagram Reels and r/popular while the rest of each site keeps working
• ·Keyword rules that match the address, title or text of a page
• ·Vacation Mode pauses blocking for 1 to 30 days, then resumes by itself
• ·Free blocking with no site cap, in 8 languages, for more than 8,000 users