Nordstjernen is a web browser, written from scratch in C, focused on supporting the HTML and CSS standards. It runs on Windows, macOS and Linux, with builds for Android, FreeBSD, NetBSD and the JVM. Nordstjernen is built in Norway.
HTML Standard. Behaviour is measured against the spec text, section by section, not against another browser — 141 spec rows fully implemented, 31 partial and 0 absent across WHATWG HTML sections 1–16. No element or API row is fully absent any more: every one is implemented, partial, or a deliberate non-goal. Against the Web Platform Tests (October 2026) it passes 91.5% of the html/, dom/, url/ and related subtests (151,974 of 166,164) and 73.2% of the css/ subtests (110,540 of 151,048), and QuickJS passes 82,243 of the 82,248 test262 tests it runs. See docs/HTML-compatibility.md.
