Word ⇄ PDF: what survives the round trip, and what quietly breaks

Word-to-PDF is the most common document conversion in the world, and it's mostly boring and reliable. The failures cluster in a few predictable places — worth knowing before you send a converted CV to a recruiter.

DOCX → PDF: usually faithful

Converting Word to PDF fixes your layout in place — that's the whole point of PDF. Things to check on the output:

• Fonts. If the document uses a font the converter doesn't have, it substitutes one with different widths, and line breaks shift. Stick to common fonts (or embed fonts in Word) for anything layout-critical.
• Tracked changes and comments. They render exactly as they're currently displayed. Accept or reject all changes before converting unless you want reviewers' comments in the PDF.
• Form controls and macros. Content controls become flat text; macros don't exist in PDF at all.

PDF → Word: reconstruction, not conversion

Going backwards with PDF to Word is fundamentally harder: PDF stores positioned glyphs, not paragraphs. The converter has to guess where paragraphs, columns and tables were. Expect:

• Good results on simple, single-column documents produced digitally.
• Messy results on multi-column layouts, heavy tables, or anything scanned (a scan needs OCR first — there's no text to extract, only a picture).
• Text boxes where you expected flowing paragraphs. Fine for grabbing content; painful for continuing to edit a long document.

If you only need the words — not the layout — Extract Text is faster and cleaner than a full Word reconstruction.

The rule of thumb

Convert forwards (Word → PDF) at the last moment, keep the DOCX as the editable source of truth, and treat backwards conversion as salvage, not workflow. If you're repeatedly converting a PDF back to Word to edit it, ask whoever produces it for the original file instead.