How resume keyword matching actually works (and a free tool to check yours)

Most "your resume will be rejected by the ATS" advice is fear dressed up as fact. Here is what is actually going on, and what you can usefully check before you apply.

What a keyword match is

When a recruiter searches their applicant tracking system, they usually search for skills: Kubernetes, TypeScript, system design. Your resume shows up only if those words are in it. Whether a given company ranks or filters on them depends on how that company set its system up, and no outside tool can know that.

What you can control is simple: if the job description asks for Kafka and you have used Kafka, the word Kafka should be on your resume, spelled the way the posting spells it.

Three things that trip people up

1. Synonyms you assume count. "Built containerised services" does not contain the word Docker. A human might connect them; a keyword search will not.
2. Close-but-different terms. JavaScript is not TypeScript, and accessible UI is not accessibility. If the posting uses a specific term and you have the skill, use the term.
3. Repeated domain words. If a posting says "payments" five times, it matters to them. It is not a skill keyword, but if you have worked on payments, say so.

How to check a resume against a posting

By hand: list every technical term in the job description, then search your resume for each one. That is tedious, so I built a small checker that does it:

👉 Free resume keyword check

Paste your resume text and the job description. It shows:

• the posting's technical keywords your resume already contains;
• the ones it is missing;
• a coverage percentage;
• words the posting repeats that your resume never uses.

It runs entirely in your browser, so nothing is uploaded, and it needs no sign-up. It is honest about its limits: it matches keywords, and it does not judge layout or writing or predict any company's ATS.

One rule: only add skills you actually have. A keyword you cannot talk about in the interview is worse than a missing one.

If you want to go further

The same page has an AI tailoring step, which rewrites a resume against a specific job description. You approve every edit as a diff and see the match before and after. The first run is free with an account. Beyond that it is ₹30 per PDF download, or ₹299 for a month of unlimited use, with no auto-renewal.

Disclosure: FaangPrep is my site. The keyword check is free with no account. This post was drafted with AI assistance and reviewed before publishing.