All Articles
Formats & Submission 6 min read Published on 28 February 2026
Knowledge · Formats & Sending

PDF or Word?
Technical Basics for Your Application

File size, format, file name — details that hardly anyone explains. And yet they can determine whether your application ever arrives or ever gets opened.

Author: myjobhub Editorial Team Reading time: approx. 4 minutes Updated: March 2026 Topics: File Format, PDF, DOCX, File Name, Sending Applications

Format: The decision is simpler than you think

Applications should always be sent as PDF — unless the company explicitly requests DOCX. A PDF looks identical on every device, every operating system and every email client. Your layout stays intact. Your fonts remain correct. No line break shifts unexpectedly.

DOCX can be the better choice in certain situations — namely when the company explicitly requests it or when an ATS is known to process DOCX better than PDF. When in doubt: always go with PDF. With our free ATS check you can find out whether your PDF is machine-readable.

Format
When to use
Risk
PDF
Standard — almost always the right choice
Some very old ATS read PDFs less reliably than DOCX
DOCX
Only when explicitly requested
Layout often breaks on other systems
JPG / PNG
Never for applications
Not searchable, not readable by ATS
ZIP archive
Never as the main file
Many mail servers block ZIP attachments

File size: How big is too big?

Application PDFs without high-resolution photos or embedded fonts are small. If your CV PDF is 8 MB, something is wrong — usually a photo in the wrong resolution.

< 2 MB
Ideal
All good portals accept this. Fast, hassle-free, works everywhere.
2–5 MB
Acceptable
Still unproblematic. Common with high-resolution photos or portfolios.
5+ MB
Too large
Some portals reject it. Email servers block it. Compress your photo.

Always export your CV photo at 72–96 dpi at the target file size — don't embed the 12 MB RAW image from the photographer directly.

File names: The first impression before opening

Recruiters see the file name before they open the file. It ends up in their downloads folder, their ATS, their filing system. A good name helps. A bad name says something about you.

Application_MaxMustermann_ProjectManager.pdf
Clear, sortable, professional
CV_Mia-Schmidt_2026.pdf
Also good — clearly separated when CV is sent individually
Application_final_final_v3_NEW.pdf
Looks unprofessional — exposes your internal workflow
Document1.pdf
Not findable, not identifiable
Application Mueller (Copy).pdf
Avoid spaces and special characters in file names

How many files — and in what order?

  • One file is better than many — if possible, combine everything (cover letter, CV, references) into a single PDF
  • Order within the PDF: Cover letter → CV → References (most recent first)
  • If portals require separate files: Upload the CV first — it's the document opened most frequently
  • Separate references only if the portal or the listing explicitly requires it
Checklist before sending

The final check before you hit send

  • Open the PDF and check — does it look the same as on your device?
  • File name correct and professional?
  • File size under 5 MB?
  • No password protection on the PDF?
  • Correct email address / correct portal?
  • Email subject line complete?
Core Rule

The technical details take you 5 minutes — and can save or sink your application.


We deliver your application ready to go — technically flawless

Cleanly formatted, correctly named, ATS-compatible. No effort on your part. Take a look at our packages.

Choose a Package → Quick Check: CV vs. Role
OK

Oliver Kellermann

Founder & Application Expert LinkedIn

Oliver develops data-driven application strategies and helps professionals position themselves effectively with the right employers.

Last checked: 28 Feb 2026

More on this topic

Related articles

Similar questions

Your application — professionally optimised

Get a free AI analysis of your CV in 30 seconds.