Free ATS Optimization Studio

Free ATS Résumé Checker & Tailoring Studio

Check your résumé against any job description, beat ATS filters with verified career facts, and tailor bullet points using real evidence — with zero hallucinated skills.

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How Applicant Tracking Systems Actually Screen Résumés

Modern ATS platforms (Workday, Greenhouse, Lever, Taleo) do not rely on simple word counts. They parse capability depth and qualification alignment.

1. Requirement Vocabulary Matching

ATS algorithms extract explicit skills, certifications, and domain requirements from the job posting. Sartho maps your approved career evidence directly to this exact requirement vocabulary.

2. Zero Hallucinations, 100% Citation

Generic AI tools make up metrics and experiences to match keywords, creating catastrophic interview risk. Sartho operates on Career Truth: every tailored bullet cites an approved achievement.

3. Honest Gap Visibility

If a job advert requires 10 years of financial domain experience and your background is in enterprise SaaS, Sartho marks it honestly as a gap. You see the true fit before an interviewer does.

The Evidence-Led ATS Tailoring Workflow

Three steps from source document to role-tailored submission.

  1. 1. Upload your résumé to build Career TruthSartho reads your document once into verified evidence items. You approve what goes into your profile, and your original document remains the source of truth.
  2. 2. Tailor drafts per opportunityFor every position in your pipeline, Sartho starts from your master résumé and highlights the specific accomplishments most relevant to the role's requirements.
  3. 3. Test ATS Readability against the advertSartho runs a live ATS vocabulary comparison against the role's explicit requirements, confirming which capabilities are evidenced and which remain gaps.

Frequently Asked Questions About ATS & Résumés

Common questions about ATS readability, formatting, and tailoring.

Is Sartho's ATS résumé checker free to use?
Yes. Sartho's ATS résumé checker and tailoring studio are completely free during our public beta. You can parse job descriptions, check requirement match scores, and create tailored drafts at zero cost.
How do I tailor my résumé to a job description?
Upload your existing résumé to extract your approved Career Truth. Then paste any job advert description or save it via our Chrome extension. Sartho compares the role's requirement vocabulary directly to your real accomplishments and writes targeted bullet points citing only approved evidence.
How does Sartho test ATS readability?
Sartho compares your résumé draft against the explicit requirement wording extracted from the job description, showing which skills are evidenced, partially met, or missing.
Why does evidence-based tailoring beat keyword stuffing in ATS filters?
Modern Applicant Tracking Systems look for semantic context and supported achievements rather than repeated keywords. Furthermore, human interviewers scrutinize every bullet point during interviews.
Can I manage a master résumé and tailored drafts?
Yes. You upload your background once to create an approved career truth. For every job advert, Sartho creates a tailored version citing those facts while keeping your master profile intact.