| File Format Support | Nisus Writer Express | Nisus Writer Pro |
| RTF, native read and write | ✓ | ✓ |
| Microsoft Word ".doc" (97-2004), import and export | ✓ | ✓ |
| Microsoft Word DOCX, import and export | limited | ✓ |
| PDF, export only | ✓ | ✓ |
| PDF export includes intra-document links (TOC, etc) | ✓ | |
| Apple Pages '09 and older, import only | ✓ | |
| Open Document (ODT), import and export | limited | ✓ |
| HTML, import and export | ✓ | ✓ |
| WordPerfect, import only | ✓ | |
| plain text (Unicode and legacy encodings), read and write | ✓ | ✓ |
| EPUB, export only | ✓ | |
| Interface | Nisus Writer Express | Nisus Writer Pro |
| Draft View and Page View | ✓ | ✓ |
| Full Screen Mode | ✓ | ✓ |
| Document Manager | ✓ | ✓ |
| Highly Customizable Interface (Flexible Palettes, Toolbar, etc) | ✓ | ✓ |
| Touch Bar, as found on some new MacBook models | ✓ | ✓ |
| Add Toolbar Item for Any Menu Command | ✓ | |
| Special Characters Palette/Menus (fully customizable) | ✓ | ✓ |
| Keyboard Shortcuts are Fully Customizable (and Multi-key) | ✓ | ✓ |
| Font Menu Previews (WYSIWYG) | ✓ | ✓ |
| Horizontal and Vertical Rulers | ✓ | ✓ |
| Document Navigator Pane (TOC and Bookmarks) | ✓ | |
| Core Features | Nisus Writer Express | Nisus Writer Pro |
| Multilingual/Unicode Text | ✓ | ✓ |
| Right to Left Text Support | ✓ | ✓ |
| Language Sensitive Responses (spellchecking, keyboard, font, etc) | ✓ | ✓ |
| Style Sheets and Library | ✓ | ✓ |
| Bullets and Numbering (List Styles) | ✓ | ✓ |
| Tables | ✓ | ✓ |
| Footnotes and Endnotes (Document or Section) | ✓ | ✓ |
| Advanced Footnote/Endnote Options | ✓ | |
| Live Word Count display (and Character/Paragraph Counts) | ✓ | ✓ |
| Multipart and Rectangular Selections | ✓ | ✓ |
| Sections and Columns | ✓ | ✓ |
| Spellchecking (Inline and Guided) | ✓ | ✓ |
| "QuickFix" Corrections (language-sensitive) for typos, smart quotes, etc | ✓ | ✓ |
| Glossaries | ✓ | ✓ |
| Leader Tabs | ✓ | ✓ |
| Wrap Text Around Images | ✓ | ✓ |
| Small Caps | ✓ | ✓ |
| Find and Replace | Nisus Writer Express | Nisus Writer Pro |
| Normal Find and Replace | ✓ | ✓ |
| Advanced Find and Replace (PowerFind / regular expressions "regex") | ✓ | ✓ |
| Find and Replace Formatting ("attribute sensitive") | ✓ | |
| Advanced Tools | Nisus Writer Express | Nisus Writer Pro |
| LinkBack Support | ✓ | ✓ |
| Widow and Orphan Control | ✓ | ✓ |
| Track Changes | ✓ | |
| Comments | ✓ | |
| Drawing Tools (shapes, text boxes, etc) | ✓ | |
| Watermarks | ✓ | |
| Table of Contents | ✓ | |
| Indexing | ✓ | |
| Bookmarks | ✓ | |
| Cross References | ✓ | |
| Mail Merge | ✓ | |
| Bookends Integration | ✓ | |
| Line Numbering | ✓ | |
| Nisus Macro Language | ✓ | |
| Flesch and Kincaid reading ease scores | ✓ | |
| Insert Automatic Content (date/time stamps, document properties, etc) | ✓ |