Split PDF by Bookmarks

How bookmark splitting works in seconds: Select any PDF up to 50 MB containing an outline and choose each bookmark as one file or one file per top-level section. The browser reads destinations with PDF.js, maps every entry to a zero-based page index, slices consecutive ranges with pdf-lib, and names each output after its bookmark title. Processing finishes in seconds at $0 cost, free and instantly offline with no signup required ever.

Methods, filenames, and safety caps: Granular mode turns nested subsections into separate files for maximum flexibility, while top-level mode groups children under parents for cleaner distribution. Titles are sanitized to filesystem-safe slugs with fallback chapter numbering, and consecutive ranges drop zero-length intervals automatically. Splits cap at fifty files per run to protect browser memory, with larger outlines handled across sequential passes without quality loss. Deduplicated start pages sorted ascending guarantee clean consecutive intervals, and zero-length chapters drop automatically before any bytes copy.

Austin case file division: On 09/21/2026, an Austin litigator divides a $600 four-hundred-page case file into fifteen bookmarked exhibits for co-counsel, replacing a $250 courier shipment of binders. Each recipient gets only relevant pages, reducing accidental disclosure risk. Privileged strategy material never leaves the firm machine because every byte is sliced locally.

Chicago and Miami chapter extraction: On 09/19/2026, a Chicago publisher extracts $2,500 in illustrated book chapters from a five-hundred-page manuscript into twenty review files, unblocking $8,000 in author advances tied to approvals. A Miami training lead the same week separates a $300 workshop guide into ten daily handouts, matching print counts to actual headcounts and saving $180 in wasted copies. Numbered handout filenames in selection order keep facilitators synchronized when rooms reshuffle between morning and afternoon cohorts.

Denver and Seattle module distribution: A Denver safety team splits a $400 training manual into department-specific modules so warehouse staff never wade through office procedures. A Seattle documentation group isolates $150 in API chapters per versioned release, letting customers download only what changed. Files without any outline report cleanly, directing users to add bookmarks or fall back to page-range splitting. Encrypted programs that block outline reads surface a clear locked-file message instead of a cryptic failure code.

New York peer review and privacy: On 09/20/2026, a New York editor cuts a $200 thirty-bookmark manuscript into individual reviewer packets in a single run, with filenames carrying chapter titles automatically. Output files are fresh PDFs optimized with object streams for compact delivery. Split by outline locally, verify the file count, and distribute precise sections with confidence. Fifty-bookmark programs finish comfortably inside one pass on modern laptops without fan noise or tab freezes.