Divide Long Documents into Standalone Chapter Files Instantly
Textbooks, legal motions, corporate annual reports, technical whitepapers, and dissertations often span hundreds of pages. In everyday workflows, colleagues, clients, and students rarely need the entire 400-page file—they only need Chapter 4, Section 2, or Exhibit C.
Manually extracting chapters using generic splitting tools is tedious: you have to look up the start and end page for every chapter, create split rules one by one, download each piece, and rename every file manually.
Commercial desktop editors like Adobe Acrobat Pro, PDFsam Enhanced, and Sejda charge expensive monthly subscriptions for bookmark splitting. Online web converters force you to upload private documents to remote cloud servers.
AirPDF delivers a 100% Free, Client-Side PDF Split by Bookmarks / Chapters Tool. Upload your document and watch our in-browser engine parse the outline tree, calculate contiguous chapter boundaries, and generate cleanly named chapter PDFs bundled in a single ZIP archive.
Automatic Chapter Detection & Front Matter Preservation
- Contiguous Boundary Mapping: Chapter 1 ends right where Chapter 2 begins, ensuring zero missing pages.
- Front Matter Safety: Cover pages, title spreads, and copyright notices preceding Chapter 1 are preserved as an independent
01_Front Matter.pdf. - Sanitized Naming: Chapter titles are automatically converted into clean, filesystem-safe filenames with two-digit sequence prefixes (e.g.,
01_Introduction.pdf,02_Methodology.pdf).
100% Local & Private Processing
All outline parsing, vector page copying, and ZIP creation execute locally in your browser memory. No file size limits, no accounts, and complete privacy.