What are you trying to accomplish?

LEOSSON PDF Navigator is built around the job you need to finish — not around a wall of PDF toolbar buttons.

✓ Work Through ItMark pages reviewed, flagged, or needing a return visit.

⌕ Smart FindSearch concepts and get page-level context instead of a bare match count.

✦ Ask the PDFAsk plain-English questions and get document-grounded answers with source pages.

✎ Review & Mark UpHighlight, annotate, or redline drawings with focused review tools.

⇄ CompareReview text, annotation, and visual changes between two PDFs.

▤ Extract ItPull requirements, revisions, dimensions, materials, contacts, and action items.

◉ Understand ItGet a document map, revision briefing, key terms, and suggested starting point.

⚠ Don't Miss ThisSurface buried warnings, requirements, field verification, tolerances, and install notes.

♫ ListenHear the current page, changes, annotations, Work List, or the whole document.

⌁ Learn ItTurn source-backed concepts into flashcards and quick quizzes.

◈ Writing Authenticity ReviewReview essay and report writing patterns locally with source evidence and follow-up questions.

↥ Export / ShareCreate a clean review report without changing the source document.

Ready. Local memory: on Website demo uses a built-in sample file; your files are not uploaded here.