Convert Word to PDF Online
Convert Word DOCX files to PDF for a fixed layout that looks consistent on other devices. The conversion runs on the server with LibreOffice, supports batches, and accepts files up to 100 MB. It is free and needs no Word installation.
Convert .DOCX to .PDF
Select a file to begin. Processing details and limits are listed below.
How to convert DOCX to PDF
- 1
Upload DOCX files
Add one or more Word documents to the queue. The server conversion starts from the original DOCX, not a preview.
- 2
Run the conversion
LibreOffice lays out the document and writes a PDF with embedded fonts and images where available.
- 3
Inspect and download
Open the PDF to check page breaks and font substitutions, then download the final file or the batch ZIP.
Microsoft Word Open XML document vs Portable Document Format
| Spec | Microsoft Word Open XML document | Portable Document Format |
|---|---|---|
| MIME type | application/vnd.openxmlformats-officedocument.wordprocessingml.document | application/pdf |
| Format type | document | document |
| Standard | ECMA-376 / ISO/IEC 29500 Office Open XML | ISO 32000 |
| First release | 2007 | 1993 |
| Browser support | Google Docs, Office for the web, and other browser editors | All current major browsers |
| Contents | ZIP package of XML parts for paragraphs, styles, relationships, images, headers, and document settings. | Fixed-layout document with text, vector graphics, embedded fonts, raster images, and optional encryption or forms. |
About Microsoft Word Open XML document
Editable, structured, widely supported by office suites, and much easier to revise than a fixed-layout PDF. Layout can shift between Word, LibreOffice, and web editors; fonts and complex objects may not render identically.
Format referenceAbout Portable Document Format
Predictable layout on every device, strong print fidelity, universal viewers, and support for signatures and forms. Editing is harder than editing a word processor document; reflow, accessibility, and text extraction depend on how the PDF was produced.
Format referenceWhy convert DOCX to PDF?
- Send a document that keeps its page layout instead of reflowing in another person's word processor.
- Create a print-ready or email-ready copy without exposing the editable source.
- Preserve headings, lists, tables, and images in a format every current browser can open.
- Archive a finished version before the source document is edited again.
Will quality change?
A good DOCX usually becomes a faithful PDF, but fonts and complex objects are the main variables. If a font is unavailable on the server, LibreOffice substitutes it, which can change line breaks and spacing. Embedded spreadsheets, unusual text boxes, and advanced fields may render differently. The PDF is a fixed copy, so later edits require the original DOCX.
Processing and limits
- Processing
- Server-side
- Engine
- LibreOffice headless document conversion
- Maximum size
- 100 MB per file.
- Batch support
- Yes, multiple DOCX files can be converted in one queue.
- Quality controls
- No quality slider. PDF output is generated from the document layout and embedded resources.
The DOCX is uploaded over HTTPS and converted by LibreOffice in an isolated process. The PDF is returned as a download. Temporary input, profile, and output files are removed after the request.
- Missing fonts can be substituted, changing line breaks and page counts.
- Complex objects such as embedded files, unusual fields, and some text boxes may not match Word exactly.
- The PDF is not editable as a Word document after conversion.
Platform compatibility
PDF opens in every current browser and in native viewers on Windows, macOS, Linux, iOS, and Android. That makes it a reliable delivery format for clients, printers, and recipients whose software you cannot control.
When not to convert
- Keep the DOCX when the recipient must continue editing or commenting on the document.
- Check the PDF before sending if the DOCX depends on a licensed or uncommon font.
- Do not rely on PDF conversion to preserve interactive form fields or macros.
Frequently asked questions
- Will the PDF look exactly like my Word document?
- Usually close, but not guaranteed. Font availability, page size, text boxes, and complex tables can affect layout. Review the PDF before sending it to a client or printer.
- Is Word installed on the server?
- No. The conversion uses LibreOffice headless, not Microsoft Word. That is why unusual Word-only features may render differently.
- Can I edit the PDF after conversion?
- The PDF is a fixed-layout copy. Keep the DOCX for future edits and use the PDF for delivery, printing, or archiving.
- Why did my fonts change in the PDF?
- The server may not have the same font installed as your computer. LibreOffice substitutes an available font, which can alter spacing and line breaks.
- Does batch conversion work?
- Yes. Add multiple DOCX files, run the queue, and download each PDF separately or collect the batch in a ZIP.
- Is my document uploaded?
- Yes. This is a server-side conversion because DOCX layout and PDF generation require LibreOffice. The file is processed over HTTPS and temporary files are deleted after the request.