About Webperf – frequently asked questions

The idea is to measure whether websites that are important to Swedish society follow best practices. It is partly a way to put pressure on those who are not performing well, while those who want to build a good website get help knowing how it turned out. Not everything is easy to measure automatically, but we are gradually adding more tests.

The following tests are run:

0. Google Pagespeed API v4 replaced by test 1
1. Web performance according to Google Lighthouse
2. HTTP status code 404
3. HTTPS check replaced by test 21
4. Search engine optimisation (SEO) according to Google Lighthouse
5. Best practices according to Google Lighthouse
6. HTML validation according to W3C
7. CSS validation according to W3C
8. Progressive Web Apps according to Google Lighthouse removed in Lighthouse v12
9. Standard files
10. Accessibility according to Axe
14. HTTP/2 replaced by test 21
15. Web performance according to Sitespeed.io
16. Usability according to Google Pagespeed API v2
17. Frontend code quality with Yellow Lab Tools
18. Accessibility according to Pa11y
19. Accessibility according to Axe
20. Privacy test with Webbkoll
21. HTTP & technology test
22. Energy efficiency
23. Tracking and privacy
24. Email
25. Software
26. Accessibility statement
27. CSS
28. HTML
29. Javascript
30. Google Lighthouse

We have vast amounts of historical data. For some websites going back to 2010, as webperf.se is the successor to a now discontinued web service called webbfunktion.com, which has been helping with web quality since 2004.

It is almost exclusively the Swedish public sector along with other websites of national interest. Since 2023, those presumed to fall under the private sector accessibility directive are also included on Webperf.se.

Websites must also have reasonably representative content. Therefore, websites that only display text saying they are under construction are delisted. Suggestions are gratefully received.

A more technical qualification is that the website must be on its own domain or subdomain.

Which address is tested?

New rule since January 2024. Webperf's position is now that the domain, without the www prefix, is the homepage.

The tests are primarily run from Sweden – in Webperf's own test environment in Dalsland (1 Gbit/s via Bitcom) or in the Glesys data centre in Falkenberg (100 Mbit/s). A backup environment runs at Hetzner in Helsinki.

Would you like to allow Webperf's IP addresses? The current list is available at premium.webperf.se.

A premium website has no advantages regarding scoring. However, those responsible receive support, tests are run more frequently, and you can log in to read more details.

Read more about the premium service »

Primarily Marcus Österberg. Webperf also consists of a community of sorts that has taken over the development of the tests since 2019. More at the Github repo for Webperf Core.

Yes. Accessibility testing and a premium service. Services are sold by Webperf AB (556729-1892).

More about Premium for web agencies.

Unless otherwise stated, the test is performed on the website's homepage or the address specified on the website's profile page on Webperf.

The idea behind the categories is that you can compare your website with similar ones and get a comparison score.

Individual tests are listed with a date. Premium websites are recalculated several times per hour. Others are updated before their respective monthly report.

In your logs you can find:

Mozilla/5.0 (compatible; Webperfbot/1.0; +https://webperf.se/om/#11)

This simply means that your site has received a visit from Webperf's automated bot – just like visits from Google, Bing and others.

Web agencies as a category shows which ones know how a good website is built. Contact order@webperf.se for more information.

Book a demo or watch the video below.