There are a bunch of man page browsers available online. They have different data sources, feature sets, and disadvantages, so here is a short comparison table:
| Name | ls man page | No Trackers/Ads | Clickable Headings | Links² | ToC¹ | Local Search | Noteworthy |
|---|---|---|---|---|---|---|---|
| Arch manual pages | ls | ✅ | ✅ | ✅ | ✅ | ✅ | Multiple languages, backlinks |
| manned.org | ls | ✅ | ✅ | ✅ | ✅ | ✅ | Multiple OS, versions, and languages. Sub-optimal search |
| Debian manpages | ls | ✅ | ✅ | ✅ | ✅ | ✅ | Multiple languages and versions, links to other sections |
| DragonFly Man Pages | ls | ✅ | ❎ | ✅ | ❎ | ✅ | |
| FreeBSD Manual Pages | ls | ✅ | ✅ | ✅ | ❎ | ✅ | Multiple versions and formats |
| OpenBSD Manual Pages | ls | ✅ | ✅ | ✅ | ❎ | ✅ | Multiple versions, apropos |
| cat-v.org | ls | ✅ | ❎ | ✅ | ❎ | ✅ | Plan9, Inferno, Bunch of UNIX versions |
| Linux man pages | ls | ❎ | ❎ | ✅ | ❎ | ❎ | |
| man7 | ls | ❎ | ❎ | ✅ | ❎ | ❎ | "Pages that refer to this page" |
| man.cx | ls | ❎ | ✅ | ✅ | ✅ | ✅ | Multiple languages |
| Ubuntu Manpage | ls | ❎ | ❎ | ✅ | ✅ | ✅ | Multiple versions |
| NetBSD Manual Pages | ls | ❎ | ❎ | ✅ | ❎ | ✅ | Really, Google Analytics? |
| unix.com | ls | ❎ | ❎ | ✅ | ❎ | ❎ | OpenSolaris, nice antique collection |
¹ short for Table of Contents ² Links directly to other man pages
there's also Bwana for locallt browsing man pages (macOS)