How Client-Side PDF Splitting and Page Extraction Works
Extracting specific pages or separating a multi-page PDF into standalone documents is a common administrative and publishing requirement. Rather than uploading confidential contracts, financial statements, or legal filings to remote third-party cloud servers, our tool processes documents entirely inside your browser's local sandbox memory using pdf-lib and JSZip.
Preserving Document Geometry and Layout Fidelity
When pages are copied from the source PDF document, the underlying binary structures—including page dimensions, MediaBox, CropBox, bleed margins, embedded vector paths, fonts, and rotation angles—are copied losslessly. The resulting PDF pages maintain exact physical point dimensions (e.g. standard A4 at 595.28×841.89 pt or US Letter at 612×792 pt).
Flexible Extraction Modes
- Combined Extraction (Single PDF): Extracts only the selected pages in original document order and packages them into a single consolidated PDF file.
- Split Extraction (ZIP Archive): Creates an individual, standalone PDF for each selected page, organized with clear, collision-safe filenames (e.g.
document-page-1.pdf) bundled inside a standard ZIP archive.
Client Memory Guardrails & Security
To protect browser tabs from exhausting available device memory, files are preflighted against memory guardrails (up to 50MB and 500 pages per document). Encrypted or password-protected files are detected upfront before memory allocation, and preview resources are automatically released upon task completion or document removal.
Frequently Asked Questions
- Mes fichiers PDF sont-ils transférés sur un serveur ?
- Non. Tout le traitement s'exécute intégralement dans la mémoire de votre navigateur via pdf-lib et JSZip.
- Puis-je extraire sous forme de PDF unique ou de fichiers séparés ?
- Oui, les deux modes sont disponibles : fusion en un seul PDF ou découpe en pages individuelles zippées.
- Comment définir une plage de pages ?
- Saisissez des expressions comme "1-3, 5, 8-10" ou cliquez directement sur les miniatures de pages.