Fillable PDF Forms

Hello, can I insert a fillable pdf in a WordPress page online?

And visitator can fill fields and save or send to mail?

Thank you

You can not embed a fillable PDF form, you can only provide your users a link of you Fillable PDF form, that they can then download, fill and submit.

https://www.jotform.com/fillable-pdf-form-creator/

If you want to embed a form to your Wordpress page, I would suggest you to embed an online form. 

A Guide to Embed Forms for WordPress Users