DOCX vs PDF — edit vs final delivery
DOCX is for documents still being edited; PDF is the locked-down final delivery. Attach both if the recipient might need either one.
Quick verdict
- Recipient needs to edit → docx.
- Locked layout (contracts, invoices) → PDF.
- Cover both → ship docx + PDF.
Side-by-side
| Property | docx | |
|---|---|---|
| Editing | Designed for it | Viewing by default |
| Layout stability | Depends on fonts and app | Fixed |
| File size | Smaller typically | Grows with embedded images |
| Security surface | Macros and external links | Embedded JavaScript, still a risk |
| Digital signatures | Limited | PDF signatures are widely supported |
Practical tips
- Contracts: ship PDF, sign via DocuSign / Adobe Acrobat Sign.
- If the recipient reports layout issues after receiving docx, send PDF alongside.