KCharSelect

It just installs kcharselect … and figuratively half of KDE :)

There seems to be a Flatpak available I’ll check out later when I have time to install hundreds of megabyte of depending other KDE-specific Flatpaks …

As far as I know, GNOME and KDE have had font viewers since time immemorial.

I was talking specifically about web fonts and web font websites which help me not the slightest with my use case.

Ideally something that allows me to see the characters in a table, sorted by character blocks, like in the LibreOffice “Insert Special Characters” dialog, so that I’m not limited to some predefined text but being able to see all characters.

These types of apps became fairly irrelevant with the advent of Web Fonts and sites that already do all of this.

That’s my point. All of those stupid modern things do not solve my issue of just double-clicking a local ttf file in my file manager to see some text rendered in that font. That is literally all I want to do.

The fact that you’re asking for whatever tool to not use something like QT or GTK

I don’t really care what graphics toolkit is used. I just don’t want something that is heavily interconnected with any type of desktop environment due to not wanting to install a metric shit-ton of dependencies 😉