How to Write an ATS-Optimized Resume in 2025
Over 98% of Fortune 500 companies use applicant tracking software to screen resumes before a human ever sees them. Learn the exact techniques that get you past the filter.
What Is an Applicant Tracking System (ATS)?
An Applicant Tracking System (ATS) is software that employers use to collect, sort, and rank job applications. When you submit your resume online, it almost certainly passes through an ATS before a recruiter ever reads it.
These systems scan your resume for keywords, formatting cues, and relevant experience. If your resume isn't formatted correctly — or doesn't contain the right keywords — it can be filtered out automatically, no matter how qualified you are.
Why ATS Optimization Matters More Than Ever
According to research by Jobscan, over 98% of Fortune 500 companies rely on ATS software. For popular roles, companies may receive hundreds or thousands of applications. The ATS acts as a first filter, passing only the most relevant resumes to human reviewers.
Getting past that filter is the first battle you need to win.
5 Core Rules for an ATS-Friendly Resume
1. Use a Simple, Clean Format
ATS parsers struggle with complex formatting. Avoid tables, text boxes, headers/footers, and multi-column layouts. Stick to a single-column format with standard fonts like Arial, Calibri, or Garamond.
2. Use Standard Section Headings
Use conventional headings the parser recognizes: "Work Experience," "Education," "Skills," and "Summary." Clever alternatives like "Where I've Been" confuse the software.
3. Mirror the Job Description
Read the job posting carefully and identify keywords — specific skills, tools, certifications, and job titles. Incorporate those exact terms naturally into your resume. If the job says "Python developer," use "Python" — not just "programming."
4. Quantify Your Achievements
Numbers stand out in both ATS scans and human reviews. Instead of "improved website performance," write "reduced page load time by 40%, increasing conversion rate by 12%."
5. Submit in the Right File Format
Unless the job posting specifies otherwise, submit as a .docx or .pdf file. Most modern ATS platforms handle both well. Avoid .pages, .odt, or image-based PDFs.
Keywords: The Engine of ATS Optimization
ATS systems rank resumes largely based on keyword matches. Here's how to find and use the right keywords:
- Copy the job description and paste it into a word-frequency tool to identify recurring terms.
- Include both acronyms and full forms — write "Search Engine Optimization (SEO)" so both variations are matched.
- Add a dedicated Skills section to list technical skills, tools, and certifications clearly.
- Avoid keyword stuffing — use keywords naturally in context, not as a list at the bottom.
Common ATS Mistakes to Avoid
- Using a PDF with embedded fonts or non-standard characters
- Storing contact information in a header or footer
- Using images, icons, or graphics in your resume
- Submitting a one-size-fits-all resume without tailoring to each role
- Listing skills as images or visual bar charts (the ATS can't read them)
Use Nexfolyo to Build an ATS-Ready Resume
Nexfolyo's resume builder generates ATS-optimized resumes automatically. Choose a template, enter your details, and our system ensures the output is clean, parseable, and keyword-ready. Try it free today.
Frequently Asked Questions
What is an ATS resume?
+
An ATS resume is formatted to be parsed by applicant tracking software that companies use to filter candidates. It uses simple formatting, standard headings, and keyword-rich content.
What file format is best for ATS?
+
.docx or a standard .pdf are the safest choices. Avoid .pages files or image-based PDFs, which many ATS systems cannot parse.
How do I find the right keywords for my resume?
+
Read the job description carefully and identify skills, tools, certifications, and job titles that appear repeatedly. Mirror those exact terms in your resume.
Does ATS optimization hurt readability?
+
No — the best ATS-optimized resumes are also easy for humans to read. Focus on clear, concise writing with relevant keywords used in context, not stuffed artificially.