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Best free Chrome extensions

The best free Chrome extensions cover the everyday jobs people search for most: blocking ads, going dark mode and cleaning up tabs. Our top pick is uBlock Origin Lite: it is free, built on Manifest V3 and blocks ads and trackers without asking for a paid tier or an account.

Last reviewed · 8 listings · Independent, not affiliated with Google

Our picks

  1. uBlock Origin Lite

    Lightweight Manifest V3 content blocker.

    Free Security & Privacy ✓ Open source✓ Manifest V3

    Review Add to Chrome

  2. Dark Reader

    Dark mode for every website.

    Free Customization ✓ Open source

    Review Add to Chrome

  3. OneTab

    Collapse all tabs into one list.

    Free Productivity ✓ No account needed

    Review Add to Chrome

  4. StayFocusd

    Limit time on time-wasting websites.

    Free Productivity ✓ No account needed

    Review Add to Chrome

  5. ColorZilla

    Eyedropper and color picker for any pixel.

    Free Design ✓ No account needed

    Review Add to Chrome

  6. WhatFont

    Hover to identify any web font.

    Free Design ✓ No account needed

    Review Add to Chrome

  7. JSON Formatter

    Pretty-print JSON right in the browser.

    Free Developer Tools ✓ Open source

    Review Add to Chrome

  8. React Developer Tools

    Inspect React component trees and props.

    Free Developer Tools ✓ Open source

    Review Add to Chrome

Not every useful extension needs a subscription. A small set of free tools covers most everyday browsing needs: blocking ads, reading pages in dark mode, tidying open tabs and inspecting a page's fonts or colors. Each pick below stays fully usable without payment or sign-up.

Free ad blockers and privacy tools

uBlock Origin Lite blocks ads and trackers using Chrome's Manifest V3 rules, so it keeps working as Chrome phases out older ad-blocker designs. It needs no account and no paid tier. Pair it with Dark Reader for a free dark mode on every website, including ones that never built their own dark theme.

Free tab and productivity tools

OneTab collapses every open tab into a single list, freeing memory and cutting through clutter for free. StayFocusd limits time on distracting sites without a subscription. Both work entirely offline once installed, so there is no ongoing service to pay for or account to create.

Free tools for developers and designers

ColorZilla's eyedropper, WhatFont's font identifier and JSON Formatter's pretty-printing are free utilities built for a single job each. React Developer Tools is free and maintained by the React team, letting you inspect component trees without any paid add-on.

Best free Chrome extensions: FAQs

What is the best free Chrome extension overall?

uBlock Origin Lite is a strong all-round pick because it blocks ads and trackers for free, needs no account and is built on Manifest V3, so it keeps working as Chrome retires older ad-blocker technology.

Is there a good free ad blocker extension for Chrome?

Yes, uBlock Origin Lite is free and blocks ads and trackers on Manifest V3, Chrome's current extension platform. It requires no sign-up and no payment for its core blocking features.

Are free VPN extensions for Chrome safe to use?

Free VPN extensions vary widely in safety. Check whether the extension has a clear privacy policy, does not sell browsing data, and only asks for the permissions a VPN needs, such as changing your proxy settings.

What is a free adblock extension that still works well?

uBlock Origin Lite remains effective because it uses Chrome's declarativeNetRequest system rather than older methods some ad blockers relied on. It is free, lightweight and does not require a paid upgrade.

Is there a free Facebook video downloader extension for Chrome?

Some extensions offer free video downloading, but check each listing carefully since download tools often need broad site permissions. Confirm the extension is actively maintained and clearly states what data it collects.

Is there a free download manager extension for Chrome?

Chrome includes a basic built-in download manager, and some extensions add features like pause and resume for free. Compare permissions carefully, since download managers typically need access to all your downloads.

Do free Chrome extensions show ads or sell your data?

Some do, which is how they fund development without charging money. Reduce risk by choosing free extensions with an open-source codebase or a clear, specific privacy policy that states what it does not collect.

Can I use free Chrome extensions without making an account?

Yes. uBlock Origin Lite, Dark Reader, OneTab, StayFocusd, ColorZilla, WhatFont and JSON Formatter all work fully without creating an account, since their features run locally in your browser.

Are free Chrome extensions safe for developers to install?

Free developer tools like JSON Formatter and React Developer Tools are generally safe because they only need access to the page you are actively working on, not your whole browsing history.

What is the difference between free and paid Chrome extensions?

Free extensions typically cover one focused task with no ongoing cost, while paid extensions often add cloud sync, team features or premium support. Many tools, like password managers, offer both a free and a paid plan.

Which free Chrome extension is best for blocking distracting sites?

StayFocusd is a free option that limits the time you can spend on chosen websites each day. It works entirely in the browser, so no account or subscription is needed to set daily limits.