You spend an hour formatting a document in Word. Fonts look right. Tables are aligned. Headers and footers are perfect. You save it as PDF and open it — and the fonts changed. The table shifted. The page breaks are wrong.
This happens because not all Word-to-PDF conversion methods are equal. Some preserve your formatting perfectly. Others butcher it. Here’s how to convert without losing anything.
Why formatting breaks during conversion
A Word document stores text as flowing content — paragraphs, styles, themes. It relies on the fonts installed on your computer to render correctly. When you convert to PDF, the converter needs to freeze that flowing content into fixed positions on a page.
If the converter doesn’t have the same fonts, it substitutes. Arial becomes Helvetica. Calibri becomes something similar but not identical. Character widths change by fractions of a millimeter — and suddenly your carefully aligned table doesn’t fit on the page anymore.
This is why some converters produce perfect PDFs and others produce garbage. It depends on whether they have access to the actual fonts your document uses.
Methods that preserve formatting (ranked)
1. Microsoft Word itself (best). If you have Word installed, File → Save As → PDF. This is always the most accurate because Word uses its own rendering engine with full access to all your fonts. The PDF will look identical to what you see on screen. Available on Windows and Mac.
2. ConvertKr Word to PDF (convertkr.com/word-to-pdf). Uses actual Microsoft Office on a dedicated server for conversion. The result is identical to doing it in Word because it IS Word doing the conversion. Good option when you don’t have Word installed or you’re on someone else’s computer. Free, no account needed.
3. Google Docs. Upload the Word file to Google Drive, open in Google Docs, then File → Download → PDF. Works for simple documents. Complex formatting — especially tables, columns, and custom fonts — often shifts because Google uses its own rendering engine, not Microsoft’s.
4. LibreOffice. Free desktop software. Open the Word file in LibreOffice Writer, export as PDF. Handles most formatting well but custom fonts and complex layouts sometimes render differently. Better than Google Docs for tables but worse than Word.
5. Online converters (iLovePDF, SmallPDF, etc.). Most use LibreOffice or similar engines on their servers. Results vary — simple documents convert fine, complex ones may have formatting issues. Files get uploaded to their servers.
What typically breaks and how to prevent it
Fonts. The most common issue. If your document uses a font the converter doesn’t have, it substitutes. To prevent this: embed fonts in your Word document before converting (File → Options → Save → check “Embed fonts in the file”). This makes the file larger but guarantees the converter has the right fonts.
Tables. Complex tables with merged cells, nested tables, or precise column widths sometimes shift. To minimize this: avoid using tab stops for alignment inside tables. Use actual table cells instead. Set fixed column widths rather than “auto fit.”
Headers and footers. Page numbers, dates, and running headers sometimes disappear or move. This usually happens with converters that don’t handle Word’s section breaks correctly. Microsoft Word and ConvertKr handle these correctly because they use Word’s native engine.
Images. Embedded images might shift position, change size, or lose resolution. To prevent this: use “In Line with Text” wrapping for images that need to stay in a specific position. Avoid “Behind Text” or “In Front of Text” wrapping for critical images.
Page breaks. Content that should be on page 2 ends up on page 1, or a page break creates an extra blank page. This happens when the converter calculates line heights differently. Using Word’s own engine avoids this entirely.
Columns. Multi-column layouts are particularly fragile during conversion. Text might overflow from one column to the next differently. If columns are critical, consider converting with Word itself or a Word-powered converter.
The embedding trick
Before converting, embed your fonts into the Word file:
Windows: File → Options → Save → check “Embed fonts in the file” → also check “Embed only the characters used in the document” (keeps file size smaller).
Mac: Word for Mac doesn’t support font embedding as cleanly. Best option is to convert using Word’s own Save As PDF, or use an online converter that runs actual Word (like ConvertKr).
Embedding fonts ensures that no matter who opens the PDF or which converter processes it, the fonts are included in the file.
Batch conversion
If you need to convert 10 or 20 Word files to PDF, doing them one by one is tedious. Options:
Word’s built-in batch: Not really possible in the standard version. You’d need a macro or VBA script to loop through files.
Online tools: Most handle one file at a time. Some paid tools offer batch conversion.
LibreOffice command line: On Mac/Linux, you can run libreoffice --headless --convert-to pdf *.docx to convert all Word files in a folder. Free but formatting quality depends on the document complexity.
Which method should you use?
You have Word installed: Save As PDF from Word. Always the best option.
You don’t have Word: Use ConvertKr — it runs actual Word on its server so the output matches. Or Google Docs for simple documents.
You’re on a phone: Upload to Google Drive, open in Docs, download as PDF. Or use an online converter in your mobile browser.
You need perfect formatting and it’s a critical document (contract, thesis, report): Always use Word itself. Don’t risk it with any other converter for documents where formatting matters.
Checking the result
After converting, always open the PDF and compare it side-by-side with the Word document. Check:
Page count — same number of pages?
Tables — columns aligned, borders intact?
Fonts — text looks the same?
Images — right position, right size?
Headers/footers — present on every page?
Page numbers — correct and in the right position?
If anything looks off, try a different conversion method. Going from the worst to the best option usually fixes the issue.
FAQ
Will the PDF be editable after conversion?
No. A PDF converted from Word is a fixed document. If someone needs to edit it, send them the Word file. If you need an editable PDF, that’s a different tool — a PDF editor that lets you add text and annotations on top.
Can I convert PDF back to Word?
Yes, but the formatting won’t be identical. PDF → Word is harder than Word → PDF because PDF doesn’t store document structure (paragraphs, styles) — it stores positioned characters. ConvertKr’s PDF to Word does a good job using Microsoft Word’s built-in PDF import.
Why is my converted PDF much larger than the Word file?
Because the PDF embeds fonts and flattens images at a specific resolution. A 500KB Word file might produce a 2MB PDF. This is normal. If the PDF is too large for email, compress it.
Does converting to PDF preserve hyperlinks?
Usually yes, if you use Word’s Save As PDF or a Word-powered converter. Links remain clickable in the PDF. Some third-party converters strip hyperlinks — always test.
Can I convert a password-protected Word file?
You need to enter the password to open it first. Once open, you can convert normally. The resulting PDF won’t be password-protected unless you specifically add protection.
What about .doc files (old Word format)?
Most converters handle .doc files. Microsoft Word and ConvertKr both support the older format. Google Docs also opens .doc files. The conversion quality is the same as .docx.
Need to convert a Word file? Convert it here — uses actual Microsoft Office for perfect formatting. Or use Word’s own Save As PDF if you have it installed.