This page is a compilation of links, descriptions, and status reports of the various alternative MediaWiki parsers—that is, programs and projects, other than MediaWiki itself, which are able or intended to translate MediaWiki's text markup syntax into something else. Some of these have quite narrow purposes, while others are possible contenders for replacing the somewhat labyrinthine code that currently drives MediaWiki itself.
Many of the things linked here are likely to be out of date and under-maintained, or even abandoned. But in the interest of not duplicating the same work over and over, it seemed sensible to collect together what was "out there".
Fully-featured round-tripping parser/runtime that powers the Visual editor on Wikipedia. Work ongoing to provide a HTML-only read / edit interface, and later to become the default parser for MediaWiki. See roadmap.
A fast, datamining-oriented C++ parser capable of processing the complete Wikipedia dump into XML and plain text in 2-3 hours. Open source, user friendly graphical interface. Windows installer available.
Provides several accessor methods in an object tree to navigate to structural elements like sections, tables, links etc. Supports extracting table data as list of lists. Available via pip, supports Python 3.
Well formed sequence of events, HTML/XHTML, other WikiMarkups
XWiki can be used a full-fledged wiki supporting several WikiMarkups (including MediaWiki's markup). It also offers a standalone Rendering Engine that can be used as a Java library for parsing/rendering WikiMarkups. Cant output to mediawiki format as of 2016/03 though.
Parse Wiki Text attempts to take all uncertainty out of parsing wiki text by converting it to another format that is easy to work with. The target format is Rust objects that can ergonomically be processed using iterators and match expressions.
"JWPL (Java Wikipedia Library) is a free, Java-based application programming interface that allows to access all information contained in Wikipedia." "JWPL is for you: If you need structured access to Wikipedia in Java." Older parser not maintained any more - JWPL uses Sweble now.
A simple client that enables you to query Wikipedia articles in english. The results are formatted in basic HTML. You can retrieve either a summary of an article (i.e. before the table of contents) or a full article.
YaCy is a search engine and a MediaWiki parser is included as one of the import modules. MediaWiki xml dumps are first converted to Dublin Core XML as intermediate format and then inserted into the search index using the built-in Dublin Core importer.
Kiwi is a PEG-based C implementation with Ruby bindings and a command line parser. It is very fast and supports most of the MediaWiki syntax.
A non-parser dumper
One of the common uses of alternative parsers is to dump wiki content into static form, such as HTML or PDF. Tim Starling has written a script which isn't a parser, but uses the MediaWiki internal code to dump an entire wiki to HTML, from the command-line. See Extension:DumpHTML. This has been used (years ago) to create the static dumps at https://dumps.wikimedia.org
en:Wikipedia:Text editor support includes various scripts and extensions for things like syntax highlighting for things like EMACS, Vim, and all sorts; some of these may include rudimentary parsing capabilities.
Here are some proof of concept rules for a subset of the Mediawiki markup: these are written in a metalanguage that treats preformatted text as source text, and everything else as comment.
Markup spec aims to produce a specification of MediaWiki's markup format.