Pandoc or an Online Converter: Which Should You Use?
Pandoc is more capable than any browser-based converter, and for most people an online converter is still the right choice. The deciding factors are whether you need features only Pandoc supports, whether you convert often enough to justify installing something, and whether you are comfortable on a command line.
Here is an honest comparison rather than a sales pitch for either.
What Pandoc is
Pandoc was created in 2006 by John MacFarlane, a philosophy professor at Berkeley, and has become the standard tool for converting between document formats. It handles roughly sixty formats and is the machinery behind a great many published books.
Its design is why it is good. Rather than converting format A directly to format B, it parses any input into a single internal representation, then writes any output from that. So it needs one reader and one writer per format instead of a converter for every possible pair, and every format benefits from improvements to the shared core.
Converting Markdown to Word with it looks like this:
pandoc report.md -o report.docxWhat Pandoc does that browsers cannot
Reference documents. You can hand Pandoc an existing .docx and it will use that document’s styles for the output. For an organisation with a mandated template, this is transformative: one flag and every document matches the house style.
Bibliographies and citations. With a citation file, Pandoc formats references in any style you name and builds the bibliography. For academic work this alone justifies installing it.
Cross-references. Numbered figures, tables and sections that renumber themselves when you insert something.
Batch processing. Converting four hundred files is a loop. In a browser it is four hundred clicks.
Filesystem access. It reads local images and includes them, because it runs on your machine with your permissions.
Every format. LaTeX, EPUB, reStructuredText, Org mode, MediaWiki and dozens more.
What browser converters do better
Nothing to install. No package manager, no PATH, no version conflicts. Open a page and convert.
No command line. For most people this is the deciding factor, and there is nothing wrong with that.
Works on any device. Pandoc will not run on a phone or a locked-down work laptop. A web page will.
Genuinely private. This is the one people get backwards. A browser converter that runs entirely client-side never sends your document anywhere, which is the same privacy guarantee as a local install. A converter that uploads to a server is a different matter, so it is worth knowing which kind you are using.
Immediate feedback. Paste, look at the result, adjust. No edit-run-check cycle.
Choosing
The short version is the table; the rest of this section is the reasoning behind it.
| Pandoc on the command line | This converter, fast mode | This converter, best quality mode | |
|---|---|---|---|
| Install anything? | Yes, Pandoc itself | No | No |
| Where the conversion runs | Your computer | Your browser | Your browser, with a one-time 15 MB download |
| Headings, lists, tables, code | Yes | Yes | Yes |
| LaTeX math as Word equations | Yes | No, kept as text with a warning | Yes |
| Footnotes as Word footnotes | Yes | No, kept inline with a warning | Yes |
| Citations from a bibliography | Yes, with a bibliography file | No | No |
| Apply a reference .docx template | Yes | No | No |
| Batch conversion and scripting | Yes | One document at a time | One document at a time |
| Live preview while you edit | No | Yes | Yes, on the fast engine |
Use Pandoc if you convert documents regularly, need a house template applied automatically, are writing anything with citations, need to batch process, or work with formats beyond Markdown and Word.
Use a browser converter if you convert occasionally, want it done in the next thirty seconds, are on a machine where you cannot install software, or your documents are straightforward prose with headings, lists and tables.
Neither is a compromise. They are different tools for different frequencies of the same task.
The line is blurring
Pandoc can now be compiled to WebAssembly, which means the engine itself can run inside a browser. That removes the traditional trade-off: Pandoc-grade output with nothing to install.
The cost is size. The compiled engine is around fifteen megabytes compressed, which is a real download on a slow connection and a meaningful chunk of a limited data plan. That is why it makes sense as a mode you switch on deliberately when you need footnotes or equations, rather than something every visitor pays for. Most documents do not need it, and for those the lighter path is faster.
Installing Pandoc, if you decide to
On macOS with Homebrew, brew install pandoc. On Windows with winget, winget install pandoc. On Debian or Ubuntu, sudo apt install pandoc, though the packaged version is often well behind; the official release is usually a better bet.
Then pandoc --version to confirm, and pandoc input.md -o output.docx to convert. Add --reference-doc=template.docx to apply a house style.
Common problems
Pandoc output looks plain. It uses default Word styles unless you give it a reference document. That is the fix.
Command not found after installing. The install location is not on your PATH. Reopen the terminal first; that resolves it more often than not.
Images are missing. Pandoc resolves relative paths from the working directory, so run it from the folder containing the document.
The online converter simplified something. Fast browser converters trade some fidelity for size. A good one tells you what it simplified rather than staying quiet about it.
The reference document, in practice
If you take one thing from Pandoc, take this. A reference document is an existing .docx whose styles Pandoc copies into everything it produces.
Generate a starting point:
pandoc -o reference.docx --print-default-data-file reference.docxOpen that file in Word. Do not type anything into it; instead modify the styles themselves. Change Heading 1 to your house font and colour, adjust Body Text spacing, set the table style. Save it.
From then on, every conversion picks those up:
pandoc report.md --reference-doc=reference.docx -o report.docxFor an organisation with a mandated template, this converts a recurring formatting chore into a flag on a command. It is the single strongest argument for installing Pandoc, and the feature people most often do not know exists.
The same idea explains why real heading styles matter in any converter. Styles are the mechanism by which a template applies. A document whose headings are merely large bold text has nothing for a template to attach to, which is why it stays stubbornly unbranded no matter which template you apply.
Frequently asked questions
Is Pandoc free? Yes, open source under the GPL.
Which produces better Word files? Pandoc, for complex documents. For ordinary prose with headings, lists and tables, the difference is usually invisible.
Can I use both? Yes, and many people do: an online converter for quick jobs, Pandoc for anything with citations or a template.
Is the browser version genuinely the same engine? Yes, compiled to WebAssembly rather than reimplemented. Try the Markdown to Word converter for the quick path, or the Word to Markdown converter for the reverse.
Using both without friction
Most people who install Pandoc keep using a browser converter as well, and that is a sensible arrangement rather than a contradiction.
The browser tool wins whenever speed matters more than control: a colleague needs the draft now, you are on a machine without Pandoc, or the document is four paragraphs and a table. The command line wins whenever the same conversion is going to happen more than once, which is the point at which a saved command beats repeated clicking.
The dividing line is repetition. A one-off conversion is a web page. A conversion you will run again next week, with the same template and the same options, is a script.