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PDF Merger & Splitter
User Guide
Merge multiple PDFs in your custom page order, or split single documents into targeted page ranges. Processing is done 100% locally client-side with `pdf-lib` to ensure full data privacy.
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✅ 100% Free
🔒 Local Processing
🔀 Custom Page Sorting
✂️ Precision Splitting
How It Works — Step-by-Step
1
Upload PDF Files
Drag and drop the PDFs you want to merge or split into the upload box.
2
Sort and Arrange Pages
Under the [Merge PDFs] tab, use arrow controls next to the file list to adjust the merging order.
3
Specify Extraction Ranges (for splitting)
Under the [Split/Extract PDF] tab, enter page ranges (e.g. 1-3, 5, 8-10) using commas and hyphens.
4
Download New PDF
Trigger the processing button to compile page byte-streams and download the final PDF file.
💡 Useful Formatting Tips
- Range Formatting:
1-3extracts pages 1, 2, and 3. You can extract individual pages by listing them alone, e.g.,5. Combine them like1-3, 5to produce a 4-page file. - Large File Threshold: Because processing uses web browser sandbox memory, very large files (>100MB) can cause browser tab lag. We recommend files under 50MB for optimal performance.
Frequently Asked Questions
🙋 FAQ
- Is my document data secure? Yes. Original PDF files do not touch any remote servers or databases, offering solid privacy protection for legal and business files.
- Does it preserve quality? Yes, the tool clones raw binary stream structures to ensure that high-resolution scans, vector shapes, and embedded fonts are preserved without degradation.