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How to convert old DOC files to DOCX on a Mac
By Himanshu Ranjan · Updated 8 November 2026
Select the .doc files in Finder, open FileDial and choose Convert › Convert to Word (DOCX). A new DOCX appears beside each original, which stays untouched. It runs offline on your Mac and handles a whole folder in one pass.
Why convert DOC at all
DOC is the binary format Word used before Office 2007. Word 2007 switched the default to DOCX, an XML-based format that is part of Office Open XML. Old DOC files often still open in current apps, but they are less portable, and some tools and portals no longer accept them.
Converting an archive of old DOC files to DOCX is a common cleanup: for sharing with colleagues, for uploading to a system that only takes DOCX, or just to stop seeing compatibility warnings.
Steps in FileDial
The tool is Convert › Convert to Word (DOCX). Its note is short: new copy beside the original. That is the whole behaviour, so there are no settings to get wrong.
Because FileDial works in batches, you can select a hundred DOC files and convert them in one gesture. Spot-check a few results afterwards, particularly files with tables or tracked changes, since old documents are the ones most likely to contain odd formatting.
- Select the .doc files in Finder.
- Hold the right Option key and release on the Convert category, then on Convert to Word (DOCX).
- Wait for the result card, which lists the new files and sizes.
- Open one or two DOCX files to check headings, tables and images.
- If you are happy, move the originals into an archive folder. FileDial does not delete them.
What to check afterwards
Conversion between Word formats is usually clean for text, headings and basic tables. Check three things: fonts that are not on your Mac, which get substituted; page breaks, which can move by a line; and any macros, which a plain DOCX does not store. Macro-enabled documents need a different format.
For files you are about to publish, convert, open, then export to PDF with To PDF › Convert to PDF to freeze the layout.
Built-in alternative
Open the DOC in Word and save it as a Word Document (.docx). In Pages, open the DOC and use File > Export To > Word, which writes a DOCX and, under Advanced Options, can write the older .doc format instead. Both methods work one file at a time, which is fine for a handful of documents and tedious for a whole archive.
The need for a batch is the reason to use FileDial here. The reverse direction also exists: Convert › Convert to Word 97 (DOC) makes old-format copies for people on very old software.
Privacy of old documents
Old document folders often hold payslips, contracts and letters. Online DOC converters need an upload, and the FBI Denver Field Office warned in March 2025 that free online converters are increasingly used to spread malware and scrape personal data. Converting locally keeps those files on your disk.
A safe way to convert an old archive
If you have years of DOC files, do not convert in place and delete. Copy the folder, convert the copy, and spot-check a sample: the oldest file, the largest file, one with a table and one with images. FileDial writes new copies beside the originals, so the safe workflow is simply to leave the originals where they are until you are satisfied.
Then decide what to do with the old ones. Some people zip them with Archive › Make ZIP for cold storage; others keep them next to the DOCX until the project closes. Both are fine, and the point is that you chose it rather than the tool.
Common mistakes and when FileDial fits
Very old or damaged files sometimes open with garbled characters because their text encoding was never declared. If the result shows odd characters, open the original in an app that lets you pick the encoding, or try Developer › Convert to UTF-8 on a text export from the file. Password-protected documents need the password before any converter can read them.
Files with embedded objects such as old charts or linked spreadsheets may lose the live link. Treat the converted copy as a fresh document and re-link anything that mattered.
If you have one or two old files and Word or Pages already open, converting by hand takes a minute and gives you a chance to inspect each page. FileDial earns its place when the count is large, when the files sit in many folders, or when you want a result card with Undo and no dialogs. It is also the choice when you would rather not install or open a big office suite for a chore.
It is not the choice when a document must be pixel-exact. Then open it in Word, repair what moved, and save from there. Treat the batch tool as a fast first pass, and keep the originals until the important files have been checked by eye.
Questions
Is DOCX better than DOC, and should I convert everything?
DOCX is the current default Word format, standardized as ECMA-376 and ISO/IEC 29500, and it is a ZIP of XML files that modern tools read well. Convert files you still use or share. Files you will never open again can stay as DOC in an archive.
Will the converted DOCX look identical to the old DOC?
Usually yes for text and simple layouts. Fonts missing from your Mac get replaced and pagination can shift slightly, so check files with complex tables or text boxes. Compare the oldest and the most complicated documents before you trust the whole batch.
Does FileDial delete my original DOC files?
No. It saves a new DOCX copy beside each original and never removes the original. Delete the old files yourself once you have checked the results, or archive them with Archive › Make ZIP if you want to keep them without clutter.