How to Format a Resume for ATS
Applicant tracking systems don't reject you for typos — they reject resumes they can't parse. Here's what actually trips them up, and how to check for it.
Published July 28, 2026
What actually breaks ATS parsing
Applicant tracking systems extract text from your resume file and slot it into fields — name, experience, skills — for a recruiter to search and filter later. The well-established list of things that trip that extraction up: multi-column layouts (text gets read out of order), text embedded in images or graphics (nothing to extract at all), tables used for layout rather than data, contact info stuck in a header or footer some parsers skip, and section titles that don't match what the system expects (a "Where I've Worked" heading instead of "Experience," for instance).
None of this is about being visually plain — a well-designed single-column resume with standard section headers parses just as cleanly as a boring one. It's specifically the layout tricks that confuse text extraction that cause problems.
What nah.tools' checker actually checks
The resume builder's ATS panel runs a fixed structural checklist, not a simulation of any specific vendor's software: does your resume have a name, email, and phone number; a professional summary; at least one work experience entry with actual bullet points describing what you did; an education section; and a dedicated skills section. Each gap it finds costs points off a 100-point score, and it tells you exactly what's missing.
Paste in a job description and it separately compares that posting's keywords against the words already in your resume — a literal overlap check, showing which terms from the posting show up in your resume and which don't.
What it doesn't do
It's not a simulation of Workday, Greenhouse, Taleo, or any other specific ATS — none of them publish their exact parsing logic, and no tool, free or paid, can promise it replicates a particular employer's software. A high score here means the common structural red flags are handled and the standard sections are present. It doesn't mean a specific employer's system will process your resume perfectly, and it doesn't evaluate whether you're actually qualified for the role — that part is still on you.
Steps
- Build or import your resume at /resume.
- Open the ATS panel and paste in the job description you're applying against.
- Review the compatibility score and the list of missing keywords.
- Fix the flagged structural gaps first — those are the fixes most likely to matter across any ATS — then work through the keyword gaps that genuinely apply to your experience.
Frequently asked questions
Does a high ATS score guarantee my resume gets through?
No — and be skeptical of any tool that implies otherwise. Every applicant tracking system parses differently, and no free or paid checker can simulate the specific software a specific employer uses. A high score here means the common structural red flags are handled, not that a specific ATS will process it cleanly.
What does the nah.tools ATS checker actually check?
A fixed checklist: presence of your name, email, and phone number; a professional summary; at least one work experience entry with real bullet points; an education section; and a skills section. It flags what's missing and deducts points for each gap — it does not parse or simulate any real ATS vendor.
What does the job-description match do?
Paste a job posting in and it compares the posting's keywords against the words already in your resume, showing what overlaps and what's missing. It's literal keyword overlap, not a judgment of whether you're actually qualified.
Is my resume uploaded anywhere?
No. Building, analyzing, and exporting all happen in your browser.