PDF vs Word vs Excel: Which Format for Which Job

Choosing the wrong format is a small but recurring headache: you open a PDF that needs editing, receive an XLSX that you only need to read, or send a DOCX that breaks on someone else's machine. Here is a quick reference.

PDF — share and archive

PDF locks layout: fonts, spacing and images look identical on every device. No editing without extra tools. Best for:

  • Anything you send for reading or printing (contracts, invoices, CVs, reports)
  • Forms you fill with a PDF reader
  • Long-term archiving of finished documents

Convert to PDF: Word to PDF, Excel to PDF, PowerPoint to PDF.

Word DOCX — write and edit

The working format. Use DOCX while the document is in progress: you need tracked changes, comments or live collaboration. Switch to PDF when it is finished and ready to share.

Convert to/from: PDF to Word, DOC to DOCX, ODT to DOCX.

Excel XLSX — data and calculations

XLSX keeps formulas, charts and pivot tables alive. Use it when the recipient needs to work with the numbers. Use CSV for data exchange with databases and scripts — it's plain text that every tool can read.

Convert to/from: Excel to CSV, CSV to Excel, Excel to PDF.

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PowerPoint PPTX — present and share slides

PPTX while presenting and building; PDF when sharing so the slide layout survives any device.

Convert: PowerPoint to PDF.

Quick decision table

  • Final document, sharing → PDF
  • Writing, editing, collaboration → DOCX
  • Live data, formulas → XLSX
  • Data import/export, scripts → CSV

ODT, ODS, ODP: the OpenDocument alternative

LibreOffice and OpenOffice use ODT, ODS and ODP instead of DOCX, XLSX and PPTX — an open, ISO-standardized alternative that covers the same ground for everyday documents, spreadsheets and presentations. The two ecosystems interoperate reasonably well for simple content, but complex spreadsheet formulas, custom macros and elaborate slide animations don't always translate perfectly between them. Convert ODT to DOCX or DOCX to ODT when moving between the two.

A simple rule for choosing

Ask what the recipient needs to do with the file. If they only need to read or print it, PDF is almost always right — it can't be accidentally edited and looks identical everywhere. If they need to edit text, use DOCX or ODT. If they need to recalculate or manipulate numbers, use XLSX or ODS. If a machine (not a person) needs to read the data, use CSV.