Most resume ATS checkers want your email, upload your resume to their servers, or paywall the results. I built one that runs entirely in your browser.
The Problem
If you've ever job-hunted, you know the drill:
- Upload resume to "free" ATS checker
- Enter your email
- Get spammed forever
- Results are behind a paywall anyway
I wanted something that actually checks your resume against a job description — without collecting any data.
The Solution
Resume ATS Score Checker — pure HTML + JavaScript, zero backend.
Your resume text never leaves your browser. No uploads, no accounts, no tracking.
What It Checks
The tool scores your resume out of 100 across several categories:
- Length analysis — too short or too long?
- Contact information — email, phone, LinkedIn present?
- Section structure — does it have Education, Experience, Skills sections?
- Action verbs — are you using strong verbs ("implemented", "designed") vs weak ones ("helped", "assisted")?
- Quantified achievements — numbers beat vague claims ("increased revenue 40%" > "increased revenue")
- Formatting — bullet points, reasonable line length
- Keyword matching — paste a job description and see which keywords from the JD appear in your resume
The Interesting Part: Keyword Matching
This is the feature that makes it actually useful. ATS systems filter resumes by keyword match. If the job description says "Python, AWS, CI/CD" and your resume doesn't mention those exact terms — you're filtered out before a human ever sees it.
The tool does a simple but effective comparison:
- Extracts meaningful keywords from the job description (filtering out stop words)
- Checks which ones appear in your resume
- Shows you exactly what's missing
No AI, no fancy NLP — just practical string matching that mimics what most ATS systems actually do.
Technical Details
For anyone curious about the implementation:
- Single HTML file — no build step, no dependencies
- ~400 lines of JavaScript — readable, no framework
- Responsive design — works on mobile
- Color-coded results — green/yellow/red for pass/warn/fail
The scoring weights are opinionated but reasonable:
- Resume length: 15 points
- Contact info: 10 points
- Section structure: 15 points
- Action verbs: 15 points
- Quantified achievements: 15 points
- Formatting: 10 points
- Keyword match: 20 points (highest weight, because it matters most for ATS)
Why Not Just Use ChatGPT?
You could paste your resume into ChatGPT and ask for feedback. But:
- Privacy — your resume contains personal info. This tool processes everything locally.
- Consistency — AI gives different advice each time. This tool gives objective scores.
- Speed — instant results vs. waiting for a response.
- Job-specific — the keyword matcher compares against a specific JD, not generic advice.
Try It
charliemorrison.dev/resume-checker
No signup. No email. Just paste and check.
If you find it useful, I also have a Job Search AI Toolkit with 50+ prompts for interviews, salary negotiation, and networking — but the checker is completely free, no strings.
Other free tools: LinkedIn Headline Generator | AI Developer Prompts (GitHub)