JSON Post Parser plugin parses your content and saves it as JSON available in REST posts and pages endpoints.
Switch branches/tags
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.


JSON post parser

Travis GitHub tag

JSON Post Parser plugin parses your content and saves it as JSON available in REST posts and pages endpoints.


When working on decoupled WordPress, while using one of the popular frameworks or libraries such as React, post content in pure HTML can be a bit of a problem. Having absolute links that point to the on-site resource would cause a page refresh. Which defeats the purpose of building with, for instance, React, which uses Link component to handle routes. This is where having post served as JSON simplifies things, in that you can find all the links, and then replace them with the appropriate router alternative.

When you create a post and then save it, the parser will go through your rendered post and parse it in JSON, which will then be saved in post_content_json table in the posts table. Other than parsing the post, this plugin registers the additional REST field called post_content_json which you can fetch by going to wp-json/wp/v2/posts/ or wp-json/wp/v2/pages/.

If you want to expose your own custom post types to the REST endpoint, use the filter json_post_parser_add_post_types.

Development Setup

npm i


composer install

Precommit tests

This will run eslint, stylelint and phpcs tests.

npm run precommit


npm run build

Unit tests

All the unit tests are located in the \tests folder. The unit testing is done via PHPUnit. Feel free to add you own tests or check the existing one. You need to have at the most PHPUnit 6 for the tests to pass.

To initialize the testing environment locally go to the project root (where phpunit.xml resides) and run

sh bin/install-wp-tests.sh wordpress_test root '' latest

This should create a temporary WordPress installation in the /private/tmp/wordpress folder. Be sure to set up the wp-config.php in the test WordPress install.

After that you can run plugin tests by writing


WordPress Installation

Once you've built the plugin using npm, you can use code found in the /build/ folder as a regular WordPress plugin.

  1. Place json-wp-post-parser folder in the /wp-content/plugins/ directory
  2. Activate the plugin through the 'Plugins' menu in WordPress

Other usages

You can use parse methods in other plugins if you want to. Once you install the plugin you can use the parse_content_to_json() method to parse HTML to json parsed content.

$parser = new \Json_WP_Post_Parser\Admin\Parse();

$parsed_content = $parser->parse_content_to_json( $html_content );

Frequently Asked Questions

Will all my posts automatically be parsed?

No. Upon plugin activation, you will see a prompt that will ask you if you want to update all your posts, pages, custom post types. If you say yes, you'll be sent to a page where you'll see all your posts being resaved using AJAX. The reason for this is that someone can have 1000+ posts, and doing bulk upgrade would fail (exhausted memory, timeout etc.). By using AJAX we can trigger post saving asynchronously, which doesn't overload the system.

How can I add my custom post types, so that rest route has it as well?

There is a built in filter hook which you can use called json_wp_post_parser_add_post_types. Say you have custom post type called books, you'd add them like this:

add_filter( 'json_wp_post_parser_add_post_types', 'my_slug_add_cpt_to_parser' );

function my_slug_add_cpt_to_parser( $post_types ) {
  // the $post_types parameter is an array of all post_types from the api_fields_init() method.
  $post_types[] = 'books';
  return $post_types;

Be aware that to access the custom post content of your custom post type, you'll have to enable its REST capabilities.

Possible issues

When using post update to update all your posts, the default number of posts that are queried is 5000. This is done to optimize query performance. Because you should never use 'posts_per_page' => -1. If you have more than 5000 posts then open class-json-post-parser-admin.php and change this number on line 84.



  • Autoloader fix
  • Removed unused packages
  • Fix the unit testing


  • Minor class fixes


  • Linter fixes
  • Class name fixes


  • Initial release


JSON post parser is maintained and sponsored by Infinum.


JSON post parser is Copyright © 2017 Infinum. It is free software, and may be redistributed under the terms specified in the LICENSE file.