Documents

What is a DOC file?

Updated Jul 2026

Definition

DOC is the file format older versions of Word used to save documents, common from the 1990s through the mid 2000s. It stores text, formatting, and images in a single binary file, so nothing about layout is lost. The catch is that it's an older format, and current software often opens it in a compatibility mode or nudges you toward converting it.

DOCLegacy Word document

Extension: .doc
Type: Documents
Typically: Old Word documents
Metadata: Carries EXIF

Why DOC exists

DOC was the default Word format for years, well before the newer DOCX format took over in 2007. It's a binary file, meaning it's structured in a way built for one specific program to read rather than as readable text, which is part of why it doesn't play as nicely with other software as newer formats do.

In plain terms, a DOC file bundles everything about your document, the words, the fonts, the page breaks, any embedded images, into one package. That's what makes it lossless: open the file again and it looks the same as when it was saved, formatting intact.

People run into DOC files today mostly because they're old: an old resume, a template someone made years ago, an archive of contracts a company never updated. Modern word processors can usually open them, but often flag them as needing conversion, and some tools or workflows expect DOCX and don't handle DOC cleanly.

The trade-offs

Strengths

Preserves formatting, fonts, and images exactly as saved
Still opens in most modern word processors
Simple single-file format with no extra folders or parts

Watch-outs

Older binary format, not readable by non-Word software the way plain text is
Larger file size than the newer DOCX format for the same content
Some modern tools and web uploaders expect DOCX and reject or mishandle DOC

A note on privacy

A DOC file can carry hidden metadata, including the author's name, the company it was created under, and edit history. If you convert it using an online tool, that file and everything embedded in it gets uploaded to someone else's server first. Converting it on your own computer means the document, and whatever personal details are buried in it, never leaves your machine.

Convert a DOC file

Questions

How do I open a DOC file?

Most current word processors on Mac and Windows open DOC files directly, sometimes in a compatibility view. If yours doesn't, converting it to DOCX or PDF usually solves the problem.

Is DOC better than DOCX?

Not really. DOCX is newer, smaller, and better supported by current software. DOC still works fine for older files, but there's no real reason to choose it over DOCX for anything new.

Why do I still have old DOC files?

Anything saved before Word switched to DOCX around 2007 was saved as DOC by default. Old resumes, templates, and archived documents are the usual culprits.

Can I convert a DOC file without uploading it?

Yes. A desktop app like Morphjet converts DOC files on your own computer, so the document and any personal details in its metadata stay off the internet.

Morphjet opens and converts DOC and 1,800+ other formats, all on your own computer. Launching this July.