The one-page rule was invented in a world of paper resumes. Today, recruiters read PDFs on screens, and the truth is more nuanced.
Use one page if: you have under 10 years of experience, you're changing careers (recruiters won't read the old field anyway), or you're applying to strict traditional industries (law, banking, academia in the US).
Use two pages if: you have 10+ years of directly relevant experience, you're applying to senior/executive roles, or you're in a field where projects and publications matter (research, engineering, medicine).
The rule that never changes: every line has to earn its place. A two-page resume padded with fluff loses to a one-page resume packed with wins.
If you're on the fence, draft both in DraftlyCV, switch templates in one click, and see which one reads stronger. The editor makes it a 60-second decision, not a rewrite.