Browser Monster Index · Open data

How websites track you, in numbers

Name: Browser Monster Index: how websites track visitors
Creator: Browser Monster
License: https://creativecommons.org/licenses/by-nc/4.0/

Every check people run on Browser Monster adds to this public dataset. We open each homepage three times from London (doing nothing, clicking reject, clicking accept) and record what loads, so you see what a visitor in the UK sees. Banners and trackers can differ in other countries.

614 sites · latest check 27 Oct 2026 · CC BY-NC 4.0 · How we check

API & releases Download Games (CSV)Explore the dataset

Tracking before any choice

50%

of 30 sites loaded cross-site trackers as the page opened

Seen after clicking reject

42.9%

of 14 sites where we could click reject

No reject on the first screen

23.3%

3.3% offered a paid option instead

Average score

58/100

10.6 tracking companies per site on average

Grades

How 30 sites in Games scored

average score

Companies on the most sites

Share of sites in Games where each was seen

Seen before any choice
Seen only later

Where the data goes

Countries of tracker servers, seen from our checker in London (in Games)

Consent tools

Cookie-banner platforms on sites in Games

tools seen

The dataset

Five linked tables, free to explore

Filter them, sort them, share the exact view, or download them. Every check adds a row.

Explore the full dataset

Most tracking seen in Games

All 30 sites →

Site	Grade	Companies	Before choice	After reject
futbin.com	FHeavy tracking seen	39	10	11
nexusmods.com	FHeavy tracking seen	17	5	2
wowhead.com	FHeavy tracking seen	34	14	4
aternos.org	FHeavy tracking seen	11	10	—
hltv.org	FHeavy tracking seen	31	1	0
jetpunk.com	FHeavy tracking seen	27	17	—
sporcle.com	FHeavy tracking seen	27	2	—
sudoku.com	FHeavy tracking seen	33	10	—

Want to reuse it? Licence, monthly releases, the API and the data dictionary →