Offices run on decades of files: contracts from 2008 in .doc, inventory lists in .xls, the company deck that has been .ppt since before some colleagues were hired. Rixoffice opens all three legacy formats and gives you a clean path to modern equivalents without a conversion service or a Windows XP virtual machine.
The legacy formats Rixoffice opens
| Legacy format | Opens in | Saves as |
|---|---|---|
| .doc (Word 97-2003) | RixDocs | .docx |
| .xls (Excel 97-2003) | RixSheets | .xlsx |
| .ppt (PowerPoint 97-2003) | RixSlides | .pptx |
Each format opens through a compatibility filter that reads the old binary structure and presents its content in the modern editor. From that point on you work normally — the fact that the file started life in 2003 stops mattering the moment it opens.
Opening and modernizing a legacy file
- Open the file with Ctrl+O, from the Home screen, or by double-clicking it.
- Review the content. Text, tables, data and slides come through; check anything layout-sensitive such as cover pages and headers.
- Press Ctrl+S — Rixoffice writes the modern format (.docx, .xlsx or .pptx) next to your work.
- Use File, Save As if you want the converted copy in a specific folder with a clear name, such as report-2026.docx beside report.doc.
- Keep the original file as the archive copy; conversion is additive, not destructive.
One save is all it takes. The result is a standard modern file that opens in Rixoffice, Word, Excel, PowerPoint, LibreOffice and Google Workspace alike.
What converts cleanly, and what to check
Most legacy content moves over directly: paragraphs and styles, tables, sheet data with formulas, slide text and images. A short checklist for the handful of things worth a second look:
- Complex headers and footers — usually fine, but glance at them on the first page.
- Old charts — they may be re-rendered; confirm the look on chart-heavy pages.
- Drawing objects and WordArt — simple shapes carry over; exotic ones may need a touch-up.
- Macros — Rixoffice does not execute macro code; it opens the content. Files that depend on macros to build themselves should be re-exported from their source system.
- Password-protected legacy files — protection from the old format is not carried into the new one, so reapply protection after converting if the document needs it.
A realistic conversion session
A typical afternoon looks like this: open the .doc contracts folder, work through each file, save each as .docx, and drop the finished set in a modern-docx folder. Twenty files later, the archive is current — and because every modern file Rixoffice writes is byte-preserving where possible, the documents you do not touch inside each file stay as the original authored them.
Why Rixoffice does not save legacy formats
Writing valid .doc, .xls and .ppt binaries is possible, but it would freeze your files in a format that modern tools, search engines and security scanners handle poorly. Rixoffice takes the position that legacy formats are for reading, modern formats are for living:
- Modern OOXML files are ZIP-based packages that survive better, compress better and validate better.
- The modern formats are what the byte-preserving engines patch with full fidelity.
- Everything downstream — PDF export, AI reading, cloud projects — is built on the modern package structure.
If a partner absolutely requires a .doc file back, the practical answer is to send the .docx; every Word version since 2007 opens it natively.
What to explore next
- DOCX compatibility explains the Word round-trip in detail.
- XLSX spreadsheets covers the spreadsheet engine and its Rust sidecar.
- PPTX presentations shows how decks keep masters and animations.