PDF Outline Studio

Give long PDFs a clear, navigable outline.

PDF Outline Studio is a paid-once, offline bookmark editor for Android. Import a readable PDF, arrange its chapters and nested sections, then create a separate PDF with embedded bookmarks and a CSV index.

EDIT THE CHAPTER TREE
• Read existing PDF bookmarks, including supported named destinations.
• Add or rename chapters and choose physical page targets.
• Move a whole branch up or down, nest it under a previous sibling, or move it out one level.
• Delete a branch with confirmation and undo your last outline edit.
• Switch between Outline and Pages on a phone. On tablets, keep the tree beside the PDF.

CHECK AND EXPORT
• Check missing titles, invalid page targets and broken hierarchy.
• Review repeated titles and backward page jumps as warnings.
• Create Outlined.pdf and a UTF-8 Outline.csv listing order, level, title and page.
• Each PDF is reopened to verify bookmark titles, levels and page targets.
• Preview the actual output, save with Android’s destination picker, or share each file.
• Keep up to eight export sets per document, with clear revision status.

LOCAL WORK, CLEAR SCOPE
Your imported source is kept unchanged. Export replaces the bookmark tree in a new PDF; it does not edit page text, images, printed contents pages or page labels. Physical page numbers start at 1 and may differ from printed labels.

No account, advertisements, subscriptions, analytics or app network permission. Files stay on your device until you choose Save or Share. Your selected storage provider or receiving app may sync them.

The library supports up to 15 PDFs, 64 MiB and 500 pages per PDF, 1,500 chapters and 12 levels, and 512 MiB private document/output storage. Password-protected, encrypted, digitally signed and damaged PDFs are not supported. No OCR, page-content editing, digital signing, AI processing or cloud collaboration is included.

Start with your own PDF or explicitly open the fictional Estuary archive example. Save final PDFs outside the app before deleting work or uninstalling.

Recent changes:
Initial Android release. Edit PDF chapter trees, preview pages, check targets, and export a separate PDF and CSV. No account, ads or subscriptions.