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Drop one DOCX or two hundred. Batch conversion is not a paid feature here.
Convert DOCX to DOC
A recipient's software or an institutional upload form only accepts the pre-2007 Word format.
SafeConvert engineFreeNo sign-upBatch supported
Waiting for files/Engine: on-device/Network requests made: 0
What actually changes
DOCX and DOC are not the same picture in two wrappers.
The XML document is written back into the old binary structure. Anything the old format cannot express is approximated or flattened.
Worth knowing first
This conversion loses capability rather than content. Features added after 2003, including SmartArt, modern chart objects, content controls and some theme-based formatting, are converted to static pictures or dropped entirely, and they cannot be edited afterwards.
Questions
DOCX to DOC, answered
Is there a reason to still use DOC?
Only compatibility with old software or a rigid upload validator. Nothing about the format is better.
Will equations survive?
Modern OMML equations become images or degrade badly. Check every equation in a converted technical document.
How to convert DOCX to DOC
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Choose your settings
Word 97-2003 is lossless, so nothing is thrown away in the conversion.
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Download
Converted and deleted the moment it finishes. Never written to permanent storage.