Word to PDF Converter — Convert DOCX to PDF Free
Upload a Word document (.docx), preview how it will look, then convert and download as PDF. No account required, no watermarks, and your file stays on your device.
How This Word to PDF Converter Works
Most online converters send your file to a cloud server — Adobe, Smallpdf, or ILovePDF — process it remotely, and return the PDF. Your confidential document is stored on their servers (often for hours or days) and subject to their privacy policies.
This tool works differently. It uses Mammoth.js — an open-source JavaScript library — to parse your .docx file directly in the browser and extract the content as HTML. That HTML is then rendered and captured using canvas, and pdf-lib assembles the final PDF. The entire process runs locally on your device.
How to Convert Word to PDF
- Drop your .docx file into the upload area or click to browse
- Wait for the document preview to load
- Click Convert to PDF
- The PDF downloads automatically — no email, no sign-up
What Formatting Is Supported?
The converter handles common Word formatting:
- Headings (H1–H6 styles)
- Paragraphs with bold, italic, and underline
- Bullet lists and numbered lists
- Basic tables
- Hyperlinks
Elements that may not carry over include: custom fonts, complex table styles, headers and footers, footnotes, comments, tracked changes, and embedded spreadsheets or charts.
Common Use Cases
Sharing Documents That Shouldn't Be Edited
PDFs are harder to edit than Word documents. Convert proposals, invoices, and formal letters to PDF before sharing to preserve their appearance and prevent accidental edits.
Uploading to Portals That Require PDFs
Job portals, college applications, and government submissions often require PDF format. Convert your resume or application documents quickly without installing software.
Archiving Documents in a Universal Format
PDF is a universal archival format supported on every device. Convert important Word documents to PDF so they can be opened without Microsoft Word or LibreOffice.
Frequently Asked Questions
What file formats are supported?
Only .docx (Microsoft Word 2007 and later) is supported. Older .doc format is not supported as it uses a proprietary binary format. If you have a .doc file, open it in Word or LibreOffice and save it as .docx first.
Is my document uploaded to a server?
No. The conversion runs entirely in your browser using Mammoth.js to parse the DOCX and pdf-lib to generate the PDF. Your document never leaves your device.
Will all formatting be preserved?
Basic formatting — headings, paragraphs, bold, italic, bullet lists, and tables — is preserved. Complex elements like advanced table styles, tracked changes, comments, footnotes, and embedded objects may not render correctly.
What is the maximum file size?
Up to 20MB. Most Word documents are well under this limit. Extremely large documents with many embedded images may take longer to process.
Why does the PDF look different from the original Word document?
The conversion uses standard web fonts (Georgia serif) for rendering. Custom fonts embedded in your Word file are substituted with fallbacks. For pixel-perfect output that matches Word exactly, use Microsoft Word's built-in Export to PDF feature.
Can I convert multiple documents at once?
Currently the tool converts one document at a time. Upload the next file after downloading the first PDF.