Written for how recruiters search, which is not how an ATS reads.
A resume is read once, by someone who already has it. A LinkedIn profile is searched, by people who do not know you exist yet. Those are different jobs, and a profile that is just your resume pasted in does neither of them well.
This rewrites your profile from your master resume, for the way recruiters actually search.

No retyping. Tell us the jobs you want next and where, and the guide is written from the document you have already built.
Headline, About, each experience entry and your skills list, built around the vocabulary recruiters put into LinkedIn rather than the keywords a resume parser indexes.
Edit any section right in the guide; it saves as you type. Or ask for a change on the headline, the About section or any description (shorter, more confident, or in your own words) and undo it if you prefer what you had.
Each section says where that field lives on LinkedIn and gives you the finished text to paste, so updating the profile is a sitting rather than a project. We never connect to your LinkedIn account; you paste each section in yourself and tick it off as it goes live.
LinkedIn Optimization reads from your master resume, so that is where to start.
Start with my resume