DOCX (Microsoft Word Open XML Document) and PDF (Portable Document Format) are built for different jobs. DOCX is typically used for editing documents, resumes, while PDF is best for sharing, printing, signing documents. Converting lets you open, share or upload your files wherever PDF is expected.
How to use the Word to PDF converter
- Add your DOCX filesClick “Choose Files” or drag and drop them into the box. You can add many files at once — or paste a file with Ctrl+V.
- Choose PDF and adjust settingsPDF is selected automatically. Optionally open Settings to change output options.
- Convert and downloadPress “Convert”. Your PDF files appear instantly — download them one by one or all together as a ZIP.
DOCX vs PDF
DOCX Microsoft Word Open XML Document
DOCX is the default Microsoft Word format. It is fully editable and supported by Word, Google Docs, LibreOffice and Pages, but layout can shift between programs.
- Compression
- ZIP-compressed XML
- Features
- Editable text, styles, images
- Origin
- 2007, Microsoft
- Best for
- Editing documents, resumes
PDF Portable Document Format
PDF keeps a document looking exactly the same on every device — fonts, images and layout included. It is the standard for contracts, invoices, forms, e-books and printing.
- Compression
- Mixed
- Features
- Fixed layout, fonts, forms
- Origin
- 1993, Adobe (ISO 32000)
- Best for
- Sharing, printing, signing documents
Why use ConvertMathly?
Files are processed on your device and never uploaded. Close the tab and they are gone.
No account, no daily cap, no queue and no watermark — convert as much as you want.
No waiting for uploads or downloads: results are ready as fast as your device can process them.
Windows, Mac, Linux, Chromebook, iPhone and Android — any modern browser, nothing to install.
Frequently asked questions
How do I convert DOCX to PDF?
Add your DOCX files above, make sure PDF is selected and press Convert. The PDF files are ready to download a few seconds later — no installation or account required.
Is there a file size or daily limit?
No. Since everything runs locally, there are no daily caps, queues or file size limits beyond what your device can handle.
Are my DOCX files uploaded to a server?
No. ConvertMathly converts files entirely inside your web browser using JavaScript and WebAssembly. Your files never leave your computer or phone, which makes it safe for private photos and documents.
Can I convert multiple DOCX files at once?
Yes — add as many files as you like. They are converted one after another and you can download everything in a single ZIP.