How to convert DOC to DOCX
- Add one or more .doc files.
- DOCX is already selected — start the conversion.
- Download your .docx files, ready to edit.
.doc is the file format of Word 97 to Word 2003. It still turns up everywhere in archives: old contract templates, application forms, theses and standard letters kept for years on an office PC. Recent versions of Word often open them in “Compatibility Mode” with some features switched off, and some mobile apps and online platforms refuse them altogether.
.docx, used since Word 2007, is an open format (Office Open XML): smaller files, better recovery when a file is damaged, and smooth support in Google Docs, LibreOffice and Word on Mac or phone. Converting .doc to .docx is the simplest way to keep editing those documents without surprises — for example before submitting a file to an employer or reusing an old form.
The conversion runs with LibreOffice on our server: text, tables, images, headers and footers are carried over. Very complex layouts (old macros, embedded objects) may need a quick check. You can convert up to 50 files at once; they are processed in memory and deleted after 30 minutes.
Frequently asked questions
What is the difference between DOC and DOCX?
DOC is the old binary format of Word 97-2003; DOCX is the open XML format introduced with Word 2007. DOCX files are smaller, sturdier and better supported by today's software.
Will my formatting be kept?
In most cases yes: text, styles, tables, images and headers are preserved. For very old or heavily formatted documents, give the result a quick look before sending it.
Are macros kept?
No — a .docx file cannot contain macros. If you need them, recreate them in a .docm file with Word.
Can I convert several .doc files at once?
Yes, add up to 50 files (300 MB each at most) and you get each one back as .docx.
Is it free?
Yes, it is completely free and needs no account. Your files are deleted automatically after 30 minutes.