Paste the posting or fetch a public careers link, add your resume, and read what it asks for: covered, weak or missing, with a match score before any change. Lines that share a requirement can be drafted one click at a time, shown as a word diff you accept or reject, and the copy you keep opens in the builder.
Wording only. A draft rephrases a line toward the requirement sentences it already shares with the posting; it never adds a skill, an employer, a date or a number, and every new fact it would introduce is flagged for you to confirm or reject.
Nothing is sent until you click a draft button. Then the one line (or the shown lines, as one request) and the requirement sentences it shares leave the browser; the posting sentences about missing skills are never sent, so a draft cannot drift toward them.
No. Nothing is edited for you. Every change is one you accept line by line, and the copy you keep is handed to the builder for you to confirm there.
Public company careers pages. Sites that show postings only after sign-in cannot be fetched; the page says so and asks for the pasted text instead.
The requirements and the scores are computed in your browser, and the server receives a count that a check ran. Text leaves only when you click: a draft sends that line, or the shown lines as one request, with the requirement sentences they share; the tough reviewer sends the working copy and the posting for that one read. Nothing is kept beyond a daily count.