If the form is a fillable PDF, then you can fill it out in most PDF readers. If it's not, you can't.
Even converted over into MS-Word will not make it a fillable form, per se, though it would make it possible to type things after the various labels.
If the company doesn't issue this as a fillable PDF form, I would contact them asking what they would prefer you do. A lot of entities create what amount to printable electronic forms, meant to be printed and filled out by hand, which is no better than real paper forms. Some are not even aware (which is a shock at this point in time) that fillable forms can be created in PDF format. Virtually every IRS form you can download in PDF format is a fillable form that allows saving after you've filled it out.
Brian - Windows 10 Pro, 64-Bit, Version 2004, Build 19041
The purpose of education is not to validate ignorance but to overcome it.