Why file type matters to an ATS

An applicant tracking system (ATS) does not read your CV the way a person does. It parses the file, extracting text into structured fields: name, work history, skills, dates. If the ATS cannot cleanly read your file format, your carefully written content can arrive garbled, misfiled, or missing entirely. Choosing the right file type is a small decision with a large downside if you get it wrong.

The file types ATS handle well

Word documents (.docx)

The .docx format is the most universally reliable choice. Nearly every ATS was built to parse Word documents, and text extraction is clean and predictable. If a job posting does not specify a format, a well-structured .docx is the safest default.

The older .doc format also works in most systems but is worth avoiding in favor of .docx, which is the modern standard.

PDF (with caveats)

Modern ATS platforms handle text-based PDFs well, and most systems today accept them. The critical requirement is that the PDF is text-based, not an image. A PDF exported from a word processor is fine. A PDF that is a scanned image or a screenshot of your CV is unreadable to an ATS, which sees only a picture with no extractable text.

If a posting explicitly allows PDF, a clean text-based PDF preserves your formatting reliably. If in doubt, follow what the application form says.

Plain text (.txt)

Parses perfectly because there is nothing to misread, but you lose all formatting. Only use it if a system specifically requests plain text.

File types to avoid

• Image files (.jpg, .png). An ATS extracts no text from an image. Your CV becomes invisible.
• Scanned or image-based PDFs. Same problem as image files, disguised as a PDF.
• Pages (.pages), or other niche formats. Many ATS cannot open them. Always export to .docx or PDF first.
• Google Docs links or shared URLs. Upload an actual file; do not paste a link unless explicitly asked.
• Compressed archives (.zip). Never zip your CV. It will not be parsed.

How to submit safely

1. Follow the application form. If it lists accepted formats, use one of them. The form is the final authority.
2. Default to .docx when unsure. It is the most broadly compatible option.
3. If you use PDF, make sure it is text-based. Test by opening it and trying to select and copy the text. If you can highlight words, so can the ATS.
4. Keep the layout simple. File type is only half the battle; complex tables, text boxes, headers, and multi-column layouts can confuse parsers regardless of format.
5. Name the file clearly. Firstname-Lastname-CV is professional and easy for recruiters to find later.

The bottom line

For ATS compatibility, a clean .docx is the safest universal choice, and a text-based PDF is a strong option when the form allows it. Avoid images, scanned PDFs, and niche formats entirely. When a posting states a preferred format, follow it exactly. The right file type ensures the CV you worked hard on is the CV the system actually reads.