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  1. Home
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  5. ATS Resume Checker

ATS Resume Checker

Compare your resume against job descriptions for keyword coverage and match percentage. Find missing terms instantly. Free offline ATS resume checker tool.

Part of our Business & Writing collection — Explore more Business & Writing tools · See also: Invoice Generator, Resume Builder.

Quick answer: ATS Resume Checker — Check resume vs job Free, no signup, runs in your browser. See below for the interactive tool, 4-step guide and FAQs.

Resume
Job description
Paste a job description to extract keywords. Keywords are extracted by splitting on whitespace, lowercasing, and filtering stopwords.
Resume highlight preview
Paste your resume above to see matched keywords highlighted in context.
Tip: ATS checks are keyword-based. Add missing terms only where you have truthful experience. For layout compliance, follow our ATS-friendly resume formatting guide.

More Business & Writing

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Learn: guides & tutorials

Deep dives from the Tool4SaaS blog — tested workflows, print sizes and fixes.

  • Free Resume Builder Guide (pillar)
  • ATS-friendly resume: beat tracking software
  • Resume format: sections, order & norms
  • 7 resume mistakes that kill interviews

About the author

Reviewed by the Tool4SaaS Editorial Team — In-house reviewers who build and test every tool locally for accuracy across current Chrome, Edge, Firefox, and Safari. Last updated: October 23, 2026. See our authors, methodology or contact us.

Frequently asked questions

It extracts keywords from the job post, drops stop words, then checks cover in your resume. For example, a 300-word post yields 40 terms, and 28 hits give a 70 percent score with 12 gaps listed. All math runs locally in your browser. No text uploads, free offline.

No. Keyword extraction and cover scoring run fully in your browser. For example, a 2-page resume with 400 words and a 300-word post never leave your device. Close the tab to clear both texts. Free offline with no account, so job plans stay private.

Paste up to about 15,000 characters in each box, free offline. For example, a 2-page resume with 400 words versus a 300-word post scores in 1 second locally with no upload. Longer pastes may slow older phones, so trim to 2 pages. Close the tab to clear all text.

Parsers match literal strings, so Next.js rarely equals NextJS and CI/CD rarely equals continuous delivery without normalization. For example, mirroring 8 posting phrases verbatim lifts 64% to 88% across two checks, while paraphrased equivalents stall near 70% despite identical experience and project scope.

Cluster short contracts under one consultancy banner with consolidated dates, quantified outcomes, and mirror posting lexicon. For instance, grouping three gigs totaling eleven months and 12 flows and +18% signup reads as continuous practice, improving keyword density without inventing tenure or obscuring employment chronology.

How to use ATS Resume Checker

  1. Paste resume text: Paste full resume text like 400-word summary listing React, Node, AWS and three roles with dates and metrics.
  2. Paste job description: Paste complete posting like 300-word JD demanding Next.js, TypeScript, CI/CD, Docker and years and location details.
  3. Check match score: View coverage like 72% with 28 hits from 40 terms and 12 gaps such as Jest, then sort missing by frequency.
  4. Fix keywords: Weave absent skills naturally like led CI/CD rollout across two bullets, then re-check to lift 64% toward 90%+.

In-depth guide

What the ATS checker does

An applicant tracking checker quantifies overlap between resume diction and posting requirements, surfacing matched competencies and absent phrases in a unified dashboard. Paste a two-page resume containing 400 words alongside a 300-word advertisement to receive instant diagnostics. For example, forty extracted terms with twenty-eight hits produce seventy percent coverage and twelve gaps including Docker and Jest, guiding targeted revisions. Recruiters routinely filter two hundred submissions to twenty human reads using similar lexical screens, so alignment influences visibility substantially. Include standard headings, month-year tenure, and eight to ten core skills to maximize parseability across Workday, Greenhouse, Lever, and iCIMS. Edge case: image-based PDFs conceal characters, therefore paste plain narrative rather than uploading scans. This analysis evaluates vocabulary solely, ignoring layout elegance, credential validity, and interpersonal fit.

How keyword matching works

Matching extracts salient nouns, verbs, frameworks, and certifications from postings, discards common stop words, then checks literal presence within resume prose. For example, lifting sixty-four percent to eighty-eight percent requires inserting eight absent skills across two revision cycles, prioritizing exact titles like Next.js and CI/CD because fuzzy variants evade detection. Maintain natural phrasing while mirroring terminology to satisfy both algorithms and hiring managers reviewing top-ranked output. The reference below clarifies impact: | Signal | Parser success | Guidance | Single-column standard headings | High | Recommended | Two-column text boxes | Low | Avoid | Scanned image PDF | Minimal | Never use |. Edge case: acronyms with slashes or periods fragment unpredictably, so replicate punctuation precisely from source listings. Re-run after each edit, track delta improvements, and preserve quantified verbs demonstrating scope, scale, and business outcomes.

ATS worked example: 400 words to 72 percent match

Paste a 400-word professional summary and a 300-word vacancy to observe seventy-two percent coverage with twelve deficiencies flagged for remediation. Integrate Docker and Jest naturally within achievement bullets, quantify deployments and test coverage, then re-evaluate to approach ninety percent across two iterations. Limits: lexical auditing ignores typography, color, graphics, factual accuracy, and interview performance, therefore cannot guarantee shortlisting despite optimized density. It supplements rather than replaces strategic networking, portfolio evidence, and tailored outreach. For polished single-column formatting that parses. construct original documents at /resume-builder before scoring iterations here. Retain plain fonts, left alignment, and chronological clarity to support both machine ingestion and rapid recruiter skimming. Validate dates meticulously, eliminate duplicate tooling mentions, and align action verbs with posting lexicon consistently.