From the Knowledgebase

PDF Thumbnails Premium Release Notes

= 1.4.3 =

  • Bug fixing of thumbnail generation at the time of uploading the PDF
  • Added the WordPress 5.6 compatibility

= 1.4.2 =

  • Updated to use the latest rendering library pdf.js. Fixes some 'strange character' issues amongst other improvements.
  • No longer needs a standalone compatbility.js file so this is not loaded in your site anymore.

= 1.4 =

  • Improved integration with PDF Embedder Premium Secure - can now embed 'Link to Media File' thumbnail images that link to a direct download of the PDF. This is achieved through the new pdf-direct-link requires a url attribute shortcode in version 3.1.4 of PDF Embedder Premium Secure.
  • Now also allows you to opt-in to beta updates of the plugin. Check the 'beta' box on the License tab to participate.

= 1.3 =

  • Support for JPEG as well as PNG - offers higher speed and lower filesize versus higher quality for PNG.
  • Added a hook that is called whenever a thumbnail is generated. Developers can react to this, for example, by adding metadata to the thumbnail
  • Hook details: pdfemb_thumbnail_created($attachment_post_id, $thumbnail_post_id)
  • This supplies the WordPress post IDs of the original PDF ($attachment_post_id) and the media item of the new thumbnail image ($thumbnail_post_id).

= 1.2 =

  • Uses the latest version of pdf.js to draw PDFs into thumbnails.
  • Display of PDF titles when bulk-generating multiple thumbnails is now clearer - sometimes filenames weren't displaying fully.

= 1.1.4 =

  • More explicit error messages when Thumbnail generation fails.

= 1.1.2 =

  • Added a Max Width setting to avoid unusually large images being created. The default is 2000 pixels in width.

= 1.1.1 =

  • Fixes for Firefox and some WordPress setups.

= 1.1 =

  • Option to regenerate thumbnails only for PDFs that don't already have a thumbnail associated with them.

= 1.0 =

  • First version.