What Is an Applicant Tracking System (ATS)?
What ATS software does, why employers use it, and what it means for how your resume is processed.
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What an ATS does
An applicant tracking system is software that employers use to manage the hiring process. When you submit a resume through a company's careers page, it typically goes into an ATS before anyone reads it. The system stores, organizes, and searches applications so recruiters can manage large volumes of candidates across multiple open positions.
The ATS parses uploaded resumes — extracting text and attempting to map it into structured fields like name, email, phone, job titles, companies, dates, education, and skills. This parsed data is what recruiters search and filter against.
How widespread is ATS usage?
The vast majority of medium and large employers use an ATS. Common systems include Workday, Greenhouse, Lever, iCIMS, Taleo, and BambooHR, among many others. Small businesses may post jobs without an ATS, but for most professional roles at established companies, your resume will go through one.
This doesn't mean an ATS is 'rejecting' your resume — that's a common misconception. Most ATS systems parse and store resumes for recruiter search. Whether a recruiter then finds and reviews your application depends on how well the parsed content matches their search criteria.
Common misconceptions
The internet is full of misleading claims about ATS software. Here's what's actually true:
- ATS systems generally don't 'reject' resumes automatically — they parse and store them. Rejection is a recruiter or hiring manager decision, not an algorithm.
- There is no single universal ATS. Different employers use different systems with different parsing engines. A resume that parses perfectly in one may have issues in another.
- You cannot 'hack' an ATS. White-text keyword stuffing, hidden metadata, and similar tricks are either ineffective or actively flagged.
- ATS compatibility and visual design aren't opposites. A clean, well-structured resume is both parseable and professional-looking.
What job seekers can do
The most effective approach is straightforward: structure your resume so that automated parsers can read it correctly. Use standard section headings, avoid complex layouts, keep your content in plain text rather than graphics, and tailor your skills and keywords to each job you apply for.
Tools like ATSConfirm can check whether your resume's structure is likely to parse correctly before you submit it, flagging specific issues and explaining how to fix them.
Frequently asked questions
- Does every employer use an ATS?
- No, but most medium and large employers do. If you're applying through a company careers page, it's very likely going into an ATS. Direct-email applications to small businesses are less likely to involve one.
- Can an ATS read images or graphics in my resume?
- Generally no. Text embedded in images, screenshots of text, skill bars, icons, and similar graphical elements are invisible to most ATS parsers. Any information you want the system to capture needs to be in selectable, plain text.
- Will ATSConfirm check my resume against a specific employer's ATS?
- No. ATSConfirm analyzes your resume against a general set of ATS parsing and structure rules. It does not connect to any employer's system. The check tells you how well your resume is structured for automated parsing in general, not for one specific platform.
Related resources
- Free ATS Resume Checker
Upload your resume and get an instant ATS compatibility score across seven categories. See exactly what an ATS parser finds — and what it misses.
- How to Make Your Resume ATS-Friendly
A practical guide to structuring your resume so applicant tracking systems can parse it correctly. Covers formatting, sections, keywords, and common mistakes.
- Resume Formatting for ATS
How file format, layout, fonts, and section headers affect whether an ATS can parse your resume. Specific guidance on what works and what breaks.
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