20 – Integrity & Security (Webbkoll)
Retired, use test 31 instead
Test 20 called the public Webbkoll service. Since Webperf began running its own Webbkoll installation in summer 2026, the test has been replaced by 31 – Privacy (Webbkoll), which audits the same ground without depending on someone else's uptime.
This page remains to explain what the number means in older results.
What the test did
The test submitted the address to the public Webbkoll service and interpreted the answer. Webbkoll audits what a web page reveals about its visitors to third parties. That covers whether the page is served over HTTPS and which third-party requests it makes. Cookies, referrer policy and security headers are included too.
The score used the same five-point scale as the other tests.
Why it was retired
The public service cached results for 24 hours, could be down, and could temporarily rate-limit an IP address making many requests. It is also run by volunteers, and Webperf's volumes didn't belong there. A self-hosted installation removes all four problems.
What to use instead
python default.py -u https://example.com -t 31 -r
31 – Privacy (Webbkoll) describes what's needed to run it.
See also
- 31 – Privacy (Webbkoll): the successor
- 23 – Tracking and Privacy