[ The page, winnowed ]

Ads off the page. The gaps close behind them.

About 120,000 rules from 10 community filter lists stop ads, banners and trackers before they load, and the empty boxes they leave behind are hidden too.

[ AD BLOCKER FOR CHROME ]

Every page in its final shape.

winnower cuts away the ads, trackers and popups, and leaves the page you came for. Free, open source, and it works on YouTube too.

v0.7.0 · GPL-3.0

[ Before it loads ]

Most ads never even arrive.

Every request a page makes is checked first. The ones headed for ad servers and trackers never leave your browser.

news.example/the-flower-game
Blocked on this tab
5
Loaded
5

[ YouTube ]

The video, without the wait.

Blocks ads on YouTube, including pre-roll and mid-roll.

It keeps working as you move from one video to the next, without a reload.

Not affiliated with YouTube or Google.

[ Popups ]

Clicks go where you meant them to.

Blocks popups and popunders from known ad networks, the extra windows and tabs a single click on the wrong page can set off.

download.example/the-flower-game
Popups blocked
3

[ By the numbers ]

Counted from the v0.7.0 release.

network rulesFrom 10 community filter lists.
124,638
ways to spot an ad boxChecked on every site.
41,030
more, written for particular sitesCovering 36,039 of them.
64,947
popup rulesFor popups and popunders.
3,017
bytes sent anywherewinnower only ever reads its own files.
0

[ You're in control ]

Every switch is yours.

Pause winnower on the site you're on, switch filter lists on and off, or turn it off everywhere.

winnower's menu also shows what actually ran on the page in front of you, so you can see it working.

news.example
Blocking on this site
Ads, trackers and popups
37blocked on this tab
118,388rules active

Filter lists

AdsEasyList + uBlock Origin filters
TrackingEasyPrivacy, Peter Lowe
PopupsPopunders, and visiting those domains too
Cookie bannersConsent overlays
AnnoyancesNewsletter nags, overlays. May break sites.

On this page

Cosmetic rules
12 selectors
Wrappers collapsed
3
Site scripts
none for this site
Popups blocked
3
Paused sites0
Master switchPause winnower on every site
Diagnostics0
© 2026 meistyr.tech · GPL-3.0v0.7.0

[ The fine print ]

What it doesn't do.

Ads inside the stream
Some streaming services stitch ads into the video stream itself. Those ads are not blocked.
Desktop only
Chrome on phones and tablets doesn't run extensions.
Chrome and Chromium only
It needs Chrome 121 or newer, or another Chromium browser.
A site might break
Blocking can occasionally stop part of a page from working. Pause winnower on that site from the toolbar and it loads as normal.
YouTube changes often
When it does, ads there can come back until winnower is updated.
Some ads will slip through
No filter list catches everything, and new ads turn up every day. If you spot one, report it on GitHub.

[ Get winnower ]

Free.
Three steps.

Add to Chromev0.7.0 · GPL-3.0
  1. 1Open winnower on the Chrome Web Store.
  2. 2Click Add to Chrome, then Add extension.
  3. 3Pin it to the toolbar, so its menu is one click away.
Full install guide