PDF vs DOCX for ATS: choose the format the evidence supports

The short answer

Use the format the employer requests. If the application accepts both and gives no preference, a text-based PDF is reasonable when you want the layout to remain fixed, while DOCX is reasonable when maximum editability or a Word-specific workflow matters. Neither extension repairs a complex or image-based resume.

The common claim that every ATS prefers DOCX is too broad. Greenhouse currently lists doc, docx, pdf, rtf, and txt as supported candidate uploads. Lever lists Microsoft Word and Adobe PDF among the formats its resume parser can process.

When PDF is the better choice

A PDF preserves page breaks, alignment, and typography across devices. That makes it useful when a carefully reviewed layout must arrive unchanged. The key condition is that the PDF contains real text. If you cannot select words with a cursor, the file may be a scan or image and may not parse reliably.

• Export directly from a document editor instead of printing and scanning.
• Select and copy a paragraph from the final PDF into a plain-text editor to inspect reading order.
• Keep contact details and section headings in the main document body, not only in headers, footers, or graphics.

When DOCX is the better choice

DOCX is a native word-processing format and is broadly accepted. It can be useful when a recruiter requests an editable document or when an application specifically names Word files. It can still contain tables, text boxes, decorative columns, and headers that make extraction harder, so the extension alone is not a safety guarantee.

• Use ordinary paragraph text and standard headings.
• Avoid using tables or floating text boxes as the primary page structure.
• Open the submitted copy once after saving to make sure fonts, bullets, and spacing did not shift.

A format decision rule you can reuse

Start with the employer's instruction. If only one format is named, use it. If PDF and DOCX are both accepted, choose the version whose extracted text reads in the right order and whose appearance you have checked. If the resume contains essential information inside images or complex layout containers, simplify the source before debating the extension.

Keep both clean exports available. Some employers or recruiters will ask for a different format later, and re-exporting from the same master document is safer than converting a submitted PDF back into Word.

Test the actual file before applying

Ryzio accepts text-based PDF and DOCX files up to 5 MB for its public ATS check. The audit verifies whether text was extracted, reviews common structural signals, and shows the sections it could identify. It does not claim that a successful Ryzio parse guarantees every employer's system will behave identically.