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MediaWiki extensions manualManual:Extensions
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Release status:Extension status stable

ImplementationTemplate:Extension#type User interface
DescriptionTemplate:Extension#description Provides an interface for migrating article text to new versions of the MediaWiki parser
Author(s)Template:Extension#username Tim Starlingtalk
Latest versionTemplate:Extension#version Continuous updates
Compatibility policyCompatibility#mediawiki_extensions release branches
MediaWikiTemplate:Extension#mediawiki 1.28+
PHPTemplate:Extension#php 5.5+
Database changesTemplate:Extension#needs-updatephp No
LicenseTemplate:Extension#license Creative Commons Zero v1.0 Universal
Hooks usedTemplate:Extension#hook

Translate the ParserMigration extension if it is available at translatewiki.net

Check usage and version matrix.

The ParserMigration extension was introduced in gerrit:296182. It provides an interface for comparing article rendering with a new non-default version of the MediaWiki parser thus serving as a parser migration tool.

It is currently deployed on the Wikimedia production cluster to compare Tidy-based output with a RemexHTML-based output. RemexHTML is a proposed replacement for Tidy.

The availability of the tool can be controlled by a user via the "parsermigration" preference option.


  • Download and place the file(s) in a directory called ParserMigration in your extensions/ folder.
  • Add the following code at the bottom of your LocalSettings.php:
    wfLoadExtension( 'ParserMigration' );
  • YesY Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.

See also[edit]