@Grégoire Noyelle
In my case Jetpack’s Markdown work only in main the_content() field.
But the markdown extra works fine in all fields that you created, including ACF plugin. Just install.
Link to download, markdown extra plugin, paste and extract in plugins folder: http://www.mediafire.com/download/k17ioezu5s74bqm/php-markdown-extra.rar
I had the same problem, to solved I added the plugin: Markdown Extra
And add-on: ACF WordPress Wysiwyg Field
In functions.php I added:
// style editor
remove_filter( 'the_content', 'wpautop' );
remove_filter( 'the_content', 'wptexturize' );
remove_filter( 'the_excerpt', 'wpautop' );
remove_filter( 'the_excerpt', 'wptexturize' );
remove_filter( 'acf_the_content', 'wpautop' );
remove_filter( 'acf_the_content', 'wptexturize' );
// markdown support
add_filter( 'the_content', 'Markdown' );
add_filter( 'the_excerpt', 'Markdown' );
add_filter( 'acf_the_content', 'Markdown' );
The plugin Typewrite also work for me only offline.
Now I added the plugin: Markdown Extra
And add-on: ACF WordPress Wysiwyg Field
In functions.php I added:
// style editor
remove_filter( 'the_content', 'wpautop' );
remove_filter( 'the_content', 'wptexturize' );
remove_filter( 'the_excerpt', 'wpautop' );
remove_filter( 'the_excerpt', 'wptexturize' );
remove_filter( 'acf_the_content', 'wpautop' );
remove_filter( 'acf_the_content', 'wptexturize' );
// markdown support
add_filter( 'the_content', 'Markdown' );
add_filter( 'the_excerpt', 'Markdown' );
add_filter( 'acf_the_content', 'Markdown' );