# Split PDF — Technical Tool Documentation > **Summary:** Create separate PDFs from ranges, every page, or groups of N pages. > **Tool Route:** `/tools/split.html` > **Visual Guide Route:** `/guides/split-pdf/` > **Category:** Organize PDF > **Processing Architecture:** 100% Client-Side. Processed in local browser memory. --- ## 1. What the Tool Does Split PDF copies selected page groups into separate files. It supports explicit ranges, one file per page, and every-N-pages grouping. **Requirements & Constraints:** One readable PDF is required. Multiple groups can trigger multiple browser downloads. --- ## 2. When to Use It Use **Split PDF** whenever you need to perform client-side organize pdf operations without uploading confidential records to third-party cloud servers. **Ideal Scenarios:** - Working on personal identity records, banking statements, medical filings, or NDAs requiring 100% local confidentiality. - Fast offline or low-bandwidth processing directly in your web browser. - Universal cross-platform document operations on Windows, macOS, Linux, Android, or iOS. --- ## 3. Key Implemented Features - **Engine Architecture:** `pdf-lib + JSZip` - **Zero Server Uploads:** Processing executes directly within client browser memory. - **Instant Processing:** Fast execution powered by WebAssembly and native HTML5 APIs. - **Review Previews:** Visual feedback and progress indicators confirm results prior to saving. - **No Sign-up / No Watermarks:** Full functionality with zero paywalls or forced branding. --- ## 4. Supported Input Files - **Primary Input:** Single PDF document (.pdf) - **Validation:** Files are validated in the browser prior to parsing. --- ## 5. Supported Output Files - **Output Format:** Individual .pdf files or a bundled .zip archive - **MIME Types:** `application/pdf` (or appropriate image/text/zip formats). --- ## 6. File Size & Memory Limits - **Recommended Bounds:** Client RAM bound (documents up to 100 MB or ~500 pages recommended) - **Technical Context:** Modern browser tabs enforce memory quotas (typically 1.5 GB to 2 GB per tab). PDFHub handles documents comfortably within standard browser memory limits. For files exceeding 150 MB or 1,000 pages, splitting into smaller sections is recommended. --- ## 7. Step-by-Step Instructions 1. **Upload a PDF and choose a split mode.** 2. **Enter ranges or a group size when the chosen mode needs it.** 3. **Select Split PDF and wait for each group to be created.** 4. **Open the resulting files and verify their names and page ranges.** --- ## 8. Required User Inputs & Controls - **File Upload Area (`#drop` / `#fin`):** Click to open native file browser or drag and drop supported files. - **Tool Options (`#opts`):** Dynamic settings panel configuring parameters, page ranges, or compression levels. - **Execution Button (`Split PDF (#splitBtn)`):** Triggers client-side processing pipeline. - **Reset Button:** Clears loaded files and resets workspace to pristine state. --- ## 9. Processing Behavior & Execution Pipeline Loads the PDF into an ArrayBuffer, resolves total page count, parses the chosen split mode (ranges, all pages, or every N pages), extracts page subsets into fresh PDFDocument instances, serializes them, and bundles multiple outputs into a ZIP via JSZip. --- ## 10. Expected Output & Download Verification - Upon successful execution, the interface triggers an automated browser download via `downloadBlob()` or opens a result review modal. - Users can verify file size, page count, and visual rendering before finalizing the download. --- ## 11. Practical Example Use Case Extracting a 5-page confidential section from a 100-page employee handbook to email to department heads. --- ## 12. Common Errors & Troubleshooting - **Issue:** If no files are created, correct the ranges or N value. - **Issue:** If downloads are blocked, update the browser permission for this site. - **Avoid:** Leaving ranges empty in range mode. - **Avoid:** Choosing Every page for a very large document without expecting many downloads. - **Tip:** Invalid page range format (e.g. typing "5-2" instead of "2-5"). Solution: Use ascending numbers separated by commas or hyphens. - **Tip:** Requesting page numbers higher than total document page count. Solution: Review page numbers in the loaded file card. --- ## 13. Privacy & Data Handling Architecture - **Local Processing:** 100% Client-Side. Processed in local browser memory. - **Browser Memory:** Document bytes reside temporarily in `ArrayBuffer` memory and are garbage collected when the browser tab is refreshed or closed. - **Cookies & Telemetry:** PDFHub sets zero tracking cookies, zero analytics beacons, and stores zero personal document data. --- ## 14. Frequently Asked Questions (FAQ) #### Q: Can I split every page separately? **A:** Yes, choose Every page as separate PDF. #### Q: Does the original remain intact? **A:** Yes. --- ## 15. Related PDFHub Tools - [Extract Pages Documentation](extract-pages.md) - [Remove Pages Documentation](remove-pages.md) - [Merge PDF Documentation](merge-pdf.md) --- ## 16. Links & Resources - **Launch Live Tool:** [Open Split PDF in PDFHub](../../tools/split.html) - **Visual Tutorial:** [View Split PDF Visual Guide](../../guides/split-pdf/) - **All Tools Master Reference:** [All Tools Reference](../all-tools-reference.md) - **Master Documentation Index:** [Documentation Index](../documentation-index.md) --- ## 17. Visual Walkthrough & Interface Screenshots ### Step 1: Open Split PDF - **Interface Control:** `Upload Drop Zone (#drop)` - **What You See:** The upload area accepts any multi-page PDF document. - **What to Do:** Navigate to Split PDF and locate the upload zone. - **Practical Pro-Tip:** Ensure your document contains at least two pages to enable splitting options. ![Split PDF Step 1 - Open Split PDF](../images/split-pdf-step-1.png) ### Step 2: Upload Multi-Page PDF - **Interface Control:** `File Browser (#fin)` - **What You See:** The file name and total detected page count are displayed above the options panel. - **What to Do:** Select your target document from your local files. - **Practical Pro-Tip:** The tool reads document page counts instantly without transmitting files over the network. ![Split PDF Step 2 - Upload Multi-Page PDF](../images/split-pdf-step-2.png) ### Step 3: Choose Split Mode - **Interface Control:** `Mode Selector (#mode)` - **What You See:** Options include "Extract page ranges", "Split every page into separate files", or "Split every N pages". - **What to Do:** Select your preferred division method from the "Split mode" dropdown. - **Practical Pro-Tip:** Choosing "Split every page" creates individual single-page documents for every sheet. ![Split PDF Step 3 - Choose Split Mode](../images/split-pdf-step-3.png) ### Step 4: Enter Target Page Ranges - **Interface Control:** `Range Input (#ranges)` - **What You See:** Input accepts comma-separated pages and hyphens for ranges (e.g. "1-2, 3"). - **What to Do:** Type the specific page ranges you want to extract into the input field. - **Practical Pro-Tip:** You can create multiple separate output files in one go by separating ranges with commas. ![Split PDF Step 4 - Enter Target Page Ranges](../images/split-pdf-step-4.png) ### Step 5: Click Split PDF - **Interface Control:** `Split Action Button (#splitBtn)` - **What You See:** The status line shows processing activity as pages are parsed into separate documents. - **What to Do:** Click the primary "Split PDF" action button. - **Practical Pro-Tip:** The original document remains completely untouched on your device. ![Split PDF Step 5 - Click Split PDF](../images/split-pdf-step-4.png) ### Step 6: Review Split Pages - **Interface Control:** `Generated Preview (#generatedPreview)` - **What You See:** The preview displays the newly isolated page sections for verification. - **What to Do:** Review the generated output document in the preview frame. - **Practical Pro-Tip:** Ensure that no necessary pages were omitted before saving. ![Split PDF Step 6 - Review Split Pages](../images/split-pdf-step-4.png) ### Step 7: Download Split Files - **Interface Control:** `Download Modal (#dlModal .btn-success)` - **What You See:** A confirmation dialog appears offering the extracted PDF or a ZIP archive containing all parts. - **What to Do:** Click the green "Download" button to save your files. - **Practical Pro-Tip:** When multiple ranges are generated, they are conveniently packaged into a clean ZIP archive. ![Split PDF Step 7 - Download Split Files](../images/split-pdf-step-4.png)