Embedly

Enhance the default WordPress embedding to get previews for any article, 
including your own blog posts. You also get embeds for Gfycat, Twitch, Google 
Maps, and Embedly’s growing list of <a href="http://embed.ly/providers" rel="nofollow ugc">500+ supported 
providers</a>.
You can customize the style of the embeds, to optimize for darker WP themes, 
alignment, and width. In addition, social buttons can be added around the embeds 
to make it easier to share content from your blog posts.
If you have an Embedly Cards account, you can link it to the plugin with your Embedly API key. Not only does this remove branding from the cards, it also gives you access to analytics and viewer behaviors for most popular music and video player embeds (YouTube, Vimeo, Instagram, SoundCloud). Find out how many people viewed your embeds for how long. To learn more about Embedly Cards please visit <a href="http://embed.ly/cards" rel="nofollow ugc">our website</a>.
Using it is as simple as the default WordPress embedding. Embed media by pasting its URL in a single line when writing a post
The plugin automatically displays an embed of the media in the WordPress post 
editor (for WP 4.0+).
Fair Warning: This plugin generates static HTML content for your posts. After you deactivate 
the plugin, that HTML will still remain behind in all posts where the plugin was used to create 
embeds.

The Embedly Plugin extends Wordpress's auto-embed feature to give your blog more media types and style optons.

Andy Fragen

Alex Kirk

Colin Stewart

Embed a PDF from the Media Library or elsewhere via oEmbed or as a block into an <code>iframe</code> tag. The URL only has to be world reachable link. Chrome uses Google Doc Viewer as Chrome seems to automatically rendered embedded JS in PDFs automatically. Uses Google Doc Viewer with mobile.
Inspired by <a href="https://wordpress.org/plugins/dirtysuds-embed-pdf/" rel="ugc">Embed PDF</a> and <a href="https://wordpress.org/plugins/rv-embed-pdf/" rel="ugc">RV Embed PDF</a>.
Many thanks to <a href="https://github.com/akirk" rel="nofollow ugc">Alex Kirk</a> for making Embed PDF Viewer compatible with the new block editor.
Development on <a href="https://github.com/afragen/embed-pdf-viewer" rel="nofollow ugc">GitHub</a>. Pull requests are welcome against the <code>develop</code> branch.
<h3>Known Issues</h3>
Occasionally Google Doc Viewer will not correctly load the PDF. Reloading the page should correct the issue, though this may need to be done several times.

Embed PDF Viewer

No settings, just add the link of the PDF on a page or use a block.

Had issue with the viewer width, but there's a simple solution for that as well, check this thread.

Thanks!

Works out of the box

Fantastic

Embed a PDF from the Media Library or elsewhere via oEmbed or as a block into an iframe tag.

Embedly vs Embed PDF Viewer