Word to PDF Converter
Convert Word documents (.docx) to PDF — preserves formatting. Free, private, runs in your browser.
What Is a Word to PDF Converter?
A Word to PDF converter transforms Microsoft Word documents (.docx) into PDF format, preserving the document formatting, structure, and visual layout. PDFs are universally viewable, cannot be accidentally edited, and look the same on every device — making them ideal for sharing, archiving, and printing.
TweakFiles converts Word documents entirely in your browser using mammoth.js (for DOCX parsing) and pdf-lib (for PDF generation). Your document is never uploaded to any server, making this the most private way to convert Word files to PDF online.
Why Convert Word to PDF?
Word documents can look different depending on which software and fonts are installed. PDFs look identical everywhere — on Windows, Mac, Linux, phones, and tablets. Converting to PDF before sharing ensures your formatting is preserved exactly as intended.
PDFs also prevent accidental editing, making them the standard format for contracts, reports, resumes, and official documents that need to maintain their integrity.
Common Use Cases
- Convert resumes and cover letters to PDF before sending
- Share reports and proposals in a non-editable format
- Prepare contracts and legal documents for signing
- Archive business documents in a universal format
- Submit academic papers and assignments as PDF
- Create printable versions of Word documents
What Formatting Is Preserved?
TweakFiles preserves headings (H1-H6), bold, italic, underline, ordered and unordered lists, tables with borders, and embedded images. The conversion uses semantic HTML as an intermediate format, which means the document structure is maintained accurately. Complex features like advanced table layouts, headers/footers, and page numbers may be simplified.
How to Convert Word to PDF in 3 Steps
Upload DOCX
Drag and drop your Word document (.docx) into the drop zone, or click to browse. TweakFiles processes everything in your browser — nothing is uploaded.
Automatic Conversion
TweakFiles parses your DOCX file using mammoth.js, renders the HTML content, and splits it into A4 pages. Headings, lists, tables, bold, italic, and images are preserved.
Download PDF
Click the download button to save your converted PDF. The file name matches your original document with a .pdf extension.
TweakFiles vs Other Word to PDF Converters
See how TweakFiles compares to popular DOCX to PDF tools.
| Feature | TweakFiles | Smallpdf | iLovePDF | Google Docs |
|---|---|---|---|---|
| Price | Free forever | $9/mo | Free (limited) | Free |
| File Privacy | 100% client-side | Uploaded to servers | Uploaded to servers | Uploaded to Google |
| Signup Required | No | Yes | No (limited) | Yes |
| Preserves Formatting | Headings, lists, tables, images | Full MS Word fidelity | Full MS Word fidelity | Near-perfect |
| Speed | Instant (no upload) | Depends on internet | Depends on internet | Depends on internet |
| File Size Limit | Browser memory | 100 MB | 25 MB (free) | No limit |
Comparison based on free tiers as of March 2026.