DOCX to PDF Converter
Convert Word DOCX documents to PDF directly in your browser. Preserves headings, bold, italic, lists, tables, and images. No upload, no account required.
Drop DOCX files here
or click to select · up to 20 files · max 50 MB each
Files never leave your device — processed locally in your browser
What it does
No upload required
mammoth.js parses your DOCX file locally. The document never leaves your browser.
Formatting preserved
Headings (H1–H6), bold, italic, bullet lists, numbered lists, and basic tables are preserved in the PDF output.
Image support
Images embedded in the DOCX are included in the PDF output.
Page size options
Choose A4 (international standard) or US Letter (8.5×11") for the PDF output.
Batch conversion
Convert multiple DOCX files to PDF at once.
How to use DOCX to PDF Converter
- 1Upload your DOCX file
Drag and drop a .docx file onto the drop zone or click to browse. Batch: upload multiple files.
- 2Choose page settings
Select page size (A4 or Letter) and margin size.
- 3Convert
Click "Convert to PDF". mammoth.js parses the DOCX → HTML, then pdf-lib renders it to PDF.
- 4Download PDF
Click the download button to save the PDF. Multi-file conversions can be downloaded as a ZIP.
When to use this
Sharing documents with non-Word users
Convert your Word resume, report, or contract to PDF for universal viewing without requiring Microsoft Word.
Submitting assignments or applications
Universities and employers often request PDF submissions. Convert your DOCX directly to PDF in seconds.
Archiving documents
PDF is the recommended format for long-term archiving due to its fixed layout and wide support.
Common errors & fixes
- Complex layout not rendering correctly
- DOCX features like multi-column layouts, text boxes, headers/footers, and SmartArt are not preserved in this browser-based converter. For complex documents, use Microsoft Word's built-in "Export as PDF" feature.
- Custom fonts not rendering
- The converter uses system fonts. Documents using rare or custom fonts will render with fallback system fonts.
- Password-protected DOCX fails
- Password-protected DOCX files cannot be parsed. Remove the password protection in Word before converting.
Technical details
| Input format | DOCX (Office Open XML, .docx) |
| Output format | PDF (Portable Document Format) |
| Parsing library | mammoth.js (DOCX → HTML extraction) |
| PDF generation | pdf-lib (HTML → PDF rendering) |
| Preservation | Headings, bold, italic, lists, basic tables, images |
| Limitations | Multi-column layouts, text boxes, headers/footers, SmartArt not supported |
| Processing location | Browser (client-side only) |
What is DOCX?
DOCX is the default file format for Microsoft Word since the 2007 release. It is an XML-based format stored as a ZIP archive (the .docx extension is actually a ZIP containing multiple XML files and assets). DOCX replaced the older binary .doc format and became an ISO standard (OOXML, ISO/IEC 29500).
DOCX is the most widely used word processing format globally, supported by Word, Google Docs, LibreOffice, Pages, and most writing tools. However, viewing a DOCX requires word processing software — PDF is a better choice for distribution.
What is PDF?
PDF (Portable Document Format) was created by Adobe in 1993 and became an open ISO standard in 2008. PDF represents documents with a fixed layout that renders identically across all devices, operating systems, and printers — regardless of which fonts, software, or platform the recipient uses.
PDF is the universal format for sharing final documents: contracts, reports, resumes, academic papers, and invoices. Unlike DOCX, a PDF cannot be easily edited (which is often desirable to prevent modifications).
DOCX vs PDF: Which format to use when?
Use DOCX when you or your recipients need to edit the content. Use PDF when you are sharing a finished document and want to preserve the exact layout and prevent easy editing.
For official documents, submissions, invoices, and archives, PDF is the professional standard. Most employers, universities, and clients prefer or require PDF. When creating your original document, work in DOCX for easy editing; then convert to PDF for distribution.
Limitations of browser-based DOCX to PDF conversion
Browser-based conversion has inherent limitations compared to Microsoft Word's native PDF export. The limitations arise because DOCX rendering is complex — Word uses a proprietary layout engine developed over 30 years.
What works well: body text, headings, bold/italic, bullet/numbered lists, basic tables, inline images. What may not convert perfectly: multi-column layouts, text boxes, floating images, headers and footers, custom styles, SmartArt, charts, and equations.
For documents with simple formatting, browser-based conversion produces excellent results. For complex reports or documents with intricate layouts, Microsoft Word's built-in "Save as PDF" produces the most accurate output.
Frequently Asked Questions
What is a DOCX file?
- DOCX is the Microsoft Word file format (Office Open XML). It is the standard for word processing documents and is supported by Word, Google Docs, LibreOffice, and most writing tools.
How do I convert DOCX to PDF?
- Drop your .docx file onto the upload zone above and click "Convert to PDF". The converter parses the DOCX using mammoth.js and renders it to PDF in your browser.
Is this DOCX to PDF converter free?
- Yes, completely free with no signup, no watermarks, and no file limits.
Does the converter upload my DOCX files?
- No. The DOCX is parsed entirely in your browser using mammoth.js. Nothing is transmitted to any server.
Can I batch convert multiple DOCX files to PDF?
- Yes, upload multiple DOCX files at once and download all PDFs in a ZIP archive.
Will the PDF preserve my Word formatting?
- Headings, bold, italic, bullet lists, numbered lists, and inline images are preserved. Complex features like multi-column layouts, text boxes, and headers/footers may not convert perfectly.
What is the maximum file size?
- No enforced limit, but very large DOCX files (>10 MB with many images) may be slow to process.
Does it work on mobile?
- Yes, the converter is mobile-responsive. For very large documents, a desktop browser will be faster.
Related Tools
DOCX to HTML Converter
Convert Word DOCX documents to clean HTML. Preserves headings, paragraphs, bold, lists, and images as base64. Outputs full page or fragment. Free, no upload.
DOCX to TXT Converter
Extract plain text from Word DOCX files. Strips all formatting and returns clean UTF-8 text. Batch support, configurable line breaks. Free, browser-based.
PDF to Word
Convert PDF files to editable Word documents (DOCX) — free, instant, runs in your browser.
JPG to PDF
Convert JPG images to a PDF document — combine multiple photos into one file in your browser.
Image to PDF
Convert JPG, PNG, WebP, and other images to PDF — batch convert and combine in your browser.