Summary
Upload your resume and paste the posting. You get a version written for that role, every change beside the sentence from your original that supports it, the posting's requirements marked supported, needs your answer, or not shown, and a Word or PDF file that parses cleanly.
Prefer to do it by hand? The method is below, with a worked example. Either way, the rule is the same: reorder and reword what is true, add nothing you cannot source.
What tailoring is, and what it is not
A tailored resume is your resume rewritten for one reader: the person screening applications for one posting. That person has the posting open in another tab and is checking, line by line, whether you have done the things it asks for. Tailoring is the work of making that check easy. The facts you lead with, the words you use for them, and the lines you cut all change from posting to posting. The facts themselves do not.
Three things count as tailoring. Reordering, so the bullet that proves the posting's first requirement is the first bullet they read. Rewording, so a bullet that says “responsible for new business” becomes the quota figure that was two bullets down, in the terms the posting uses. Cutting, so the newsletter you organised in 2021 stops competing for attention with the work that matters here.
Three things do not count, and they are where most AI tools go wrong. Adding a skill the posting names that you have not used. Adding a result you cannot show. Promoting your role, so “supported the migration” becomes “led the migration”. Each of these gets a resume past a skim and then costs the candidate the interview, because the first technical question lands on the line that was invented.
What the tool does that you would otherwise do by hand
It runs the seven steps above and shows its work. The posting's requirements come out as a list, each marked supported, needs your answer, or not shown, with the sentence that supports it where there is one. Each change to a bullet or the summary is shown as a before and after beside the source sentence and its location, with one line on why it helps. You accept each change, edit it, or keep your original.
Two things are built in that are easy to skip by hand. First, a check pass reads every rewritten line against your original and rejects the ones that claim more than the original supports; the rejected rewrite is shown to you with the reason, and your wording is kept. Second, where the posting asks for something your resume only half supports, the tool asks you a question in plain words, such as “Which qualification method did you use, if any? Describe what you did, or leave this out.” Your answer goes in labelled “added by you”. Leave it blank and the resume says nothing about it.
There is a dial on the form for how much rewording you want: keep my wording, standard, or rewrite more. The no-unsupported-claims rule holds at every setting; the dial changes how much the sentences are reshaped, never what they claim.
After the resume, the same approved facts feed a cover letter and answers to the posting's own application questions. The posting itself is looked up on the employer's own careers page and dated, so you know it was listed when you applied.
Keywords, parsers and the ATS question
Using the posting's terms matters, but not for the reason most tools sell. An applicant tracking system is a database with a search box. The recruiter searches it for the terms in the posting, so a resume that proves a requirement in different words can be missed by a search even though a human would count it. Matching terms helps you turn up in that search. It does not get you past a robot that rejects on formatting, because recruiters on record say that robot mostly does not exist; knockout questions on the application form do the rejecting.
Formatting still matters for parsing. Single column, standard section headings, no tables or text boxes holding the facts, a Word file or a text-based PDF. The tool exports that way and shows you the plain-text view a parser reads. More on what is actually true about applicant tracking systems is on the ATS page, with the survey and its sample size.
The rule in one line
Reorder and reword what is true. Add nothing you cannot point to on the original. Show the source for every change.
Eachrole, Tailor your resume
Source: Finwell, bullets 2 and 5; skills line