Your resume should not feel like a password for the ATS.

You are trying to describe your work. Suddenly you are debugging a file.

One person says PDF. Another says never PDF. Someone has a score for your resume, and someone else says that score is meaningless. You start with a real job history and end up wondering whether a heading has ruined your chances.

The uncertainty makes sense. When the application gives you no useful feedback, a rule you can fix feels comforting. Change the font, change the keywords, move the email address. At least that is a task with an ending.

But an applicant tracking system, or ATS, is not one universal machine with one secret password. It is a category of hiring software. The system, the employer's settings and the job's requirements all matter. A cleaner file can help information travel. It cannot make an employer promise to read it.

Parsing is not the same thing as deciding.

A resume parser extracts information from your document into fields such as your name, work experience or education. Greenhouse's support documentation describes scanning a resume to auto-fill a candidate profile.

That documentation also describes partial or unsuccessful parsing. In its example, a file can remain attached to the candidate even when the fields do not fill correctly. A parsing problem is not, by itself, proof of an automatic rejection.

Screening rules are another question. An employer may use eligibility questions or filters to organize applications. Greenhouse's explanation of its application process gives examples of employer-configured rules. Rewriting your bullet points cannot fix an answer that truthfully does not meet a role's essential requirement.

Make it easy to read before you make it clever.

A simple, single-column version is a sensible starting point when you do not know the parser. Use clear section headings, recognizable job titles and normal text. Put essential contact details in the document body rather than only in a decorative header or image.

Greenhouse lists graphics, image-only resumes, complex tables, headers, footers and columned layouts among possible parsing problems. That is a product-specific warning, not a claim that every resume with a column is rejected everywhere.

If your portfolio needs visual design, keep it. You can still maintain a straightforward application resume alongside it. The goal is to let your work be understood, not to erase the work that needs showing.

PDF is not a universal mistake. Read the instructions.

Greenhouse's supported-upload documentation lists .doc, .docx, .pdf, .rtf and .txt. Other portals can have different requirements, so use the formats the particular application accepts.

Uploading a file successfully and parsing it successfully are different operations. Greenhouse currently documents a larger upload limit than its resume parser's size limit. That is why a simple rule such as "the form accepted it, so everything was extracted perfectly" goes too far.

Before submitting, open the exported document. Can you select the text? Is the reading order sensible when you copy it into a plain text editor? If the form auto-fills your history, check those fields. These checks can reveal obvious problems. They are not an ATS certification test.

Use the employer's language when it describes something you can actually do.

CareerOneStop recommends looking at job postings for skills, requirements and credentials, then tailoring the resume. That is different from hiding a block of keywords or copying every requirement into your experience.

If you have used SQL to investigate a customer-retention problem, say what you used it for. If you have not used a tool, do not manufacture the skill to satisfy a score. A real example gives a person something to understand when they reach your application.

There is no score in this article that guarantees an interview. There is no universal percentage of applications that we can honestly say an ATS rejects. The useful work is more ordinary: relevance, accurate examples, readable text and a careful check of the form.

Then let this version be finished for a while.

Save a solid base document. Change what the role actually calls for. Ask someone you trust to read for clarity rather than mystery points.

If an application goes quiet, that still does not identify a formatting defect. Application silence has limits as feedback. You can investigate a real problem without treating every silence as a command to rebuild yourself.

And if endless resume edits are making the whole search feel heavy, you can set an endpoint for today. Your resume is a document about your work. It is not a verdict on the person doing the search.