The best way to edit PDF files is using the Adobe PDF editor included in Adobe Acrobat. It is also possible to edit PDF documents in Microsoft Word or with free online tools, but these options may be limited in functionality as compared to Adobe Acrobat.
Adobe Systems Incorporated is the originator of the Portable Document File format and continues to make the industry-standard tools for editing PDF files. Adobe Acrobat allows users full control over editing the text, images and layout of PDF files. However, Acrobat is also a proprietary software package that has a substantial price tag that may be too high for users who do not edit PDF files regularly.
Many versions of Microsoft Word can open PDF files directly as of 2015, allowing users to edit the file's content and export the edited file as a PDF. While Microsoft Word is more commonly available to most users than Adobe Acrobat, there are some flaws in its PDF editing capabilities that may make it unsuitable for editing some documents. Formatting and pages may not always perfectly replicate the original document. Microsoft states that Word is best suited for editing PDFs that consist mainly of text rather than images.