Most large employers run your resume through an applicant tracking system before a person sees it. This reads your file the same way that software does — using the same PDF parsing library — and tells you what survives the trip, and why anything that does not matters.

What an applicant tracking system actually does

An applicant tracking system is a database. When you upload a resume to a company's careers portal, the first thing that happens is not a person reading it — it is software converting your file to plain text and trying to work out which part is your name, which part is your last job, and when you held it.

Almost everything that goes wrong goes wrong in that conversion. The writing can be excellent and the design can be beautiful, and it will not matter if the parser put your job title in the education field or dropped your phone number because it sat in the page header.

There is a persistent myth that these systems reject resumes automatically for a low score. Mostly they do not: they file your application and let a recruiter search it. The real damage is quieter. If your skills did not make it into the record, you do not come up in the recruiter's search, and nobody ever decides to reject you — you simply are not there.

What this checker looks at

Whether there is readable text at all. A resume that was scanned, photographed or exported as an image has nothing for a parser to read. This is the failure that makes every other consideration irrelevant, and people are often unaware of it.
Whether your layout has columns. Two-column resumes are the most common silent failure: a parser reading straight across the page interleaves your sidebar with your job history, producing text that means nothing. Nothing looks wrong to you when you send it.
Whether your contact details can be found, and whether they are stranded in a page header or footer that some parsers discard before reading.
Whether your section headings are the ones parsers look for. "Experience", "Education" and "Skills" are matched against a known list. "Where I have been" is not on it.
Whether your dates can be read as a timeline, which is what an experience filter runs against.
Whether your bullets describe achievements or duties, and whether anything is quantified. This part is for the human reader rather than the machine, but it is the part that decides whether the human calls you.
Which terms from a job posting are missing, if you paste one in. This is the single most useful thing you can do before applying.

Why your file never leaves this page

Your resume is read in your browser. It is not uploaded, not stored, and not seen by us — there is no server here to send it to. You can verify that: open your browser's developer tools, switch to the Network tab, and drop your file in. Nothing goes out.

This is not a small point. A finished resume is a complete record of where you have worked, when, and how to contact you, and handing that to a website in exchange for a score is a real trade. Most checkers require an account first, which means they keep it.

What a score is and is not worth

Every tool of this kind produces a number, and every number is invented. There is no standard ATS score, no shared scale, and no way for any external tool to know how a particular employer's system is configured. A site that tells you "your resume scores 64 against Workday" is guessing.

So treat the number here as an index into the list, not a verdict. The findings are the product: each one says what was seen, why a parser cares, and what to change. If you disagree with one, you have enough information to decide that for yourself — which is the opposite of what a bare score offers.

The quickest test you can run without any tool

Open your resume in a PDF reader. Select all the text, copy it, and paste it into a plain text editor.

What you are looking at is roughly what the parser sees. If it reads top to bottom in the order you intended, you are in good shape. If your skills list is spliced through the middle of a job description, you have found your problem — and you found it the same way this page did.

Fixing what this finds

Most of what goes wrong here is a layout problem rather than a writing problem, and the fastest fix is usually to rebuild in a layout that does not have the fault. The free resume builder on this site produces single-column, parser-safe PDFs with real text, and it costs nothing to try — the templates are here, and each one says plainly whether it is safe to send through a company portal.