📄 PDF Merge
Combine multiple PDF files into a single document. Free, fast, and private — all processing happens in your browser.
Files to merge (0)
📋 When to Use the PDF Merge
The PDF Merge is perfect for anyone who works with documents regularly — whether you're combining reports, splitting chapters, or converting files for sharing. Use it when you need to process PDFs quickly without installing Adobe Acrobat or uploading sensitive documents to unknown cloud services. All processing happens in your browser, so confidential documents stay private. Great for business, academic, and personal use.
⚙️ How the PDF Merge Works
The PDF Merge processes PDF files entirely in your browser using client-side JavaScript libraries. When you select or drag-and-drop PDF files, the browser reads them using the File API and processes them using PDF manipulation libraries (PDF-lib, jsPDF, PDF.js). Operations like merging, splitting, or converting happen locally — your documents are never uploaded to any server. The processed file is then offered for download. For privacy, all temporary data is cleared when you close the tab.
How to Use the PDF Merge Tool
- Upload your PDFs — Click the upload area or drag and drop your PDF files. You can add as many files as you need.
- Arrange the order — Drag to reorder your PDFs in the sequence you want them merged. The first PDF will be the first pages of your combined document.
- Click Merge — Press the "Merge PDFs" button and our tool will combine all your files in seconds.
- Download — Your merged PDF will be ready instantly. Click download to save it to your device.
Frequently Asked Questions
Is it safe to upload my PDFs?
Absolutely. Your files never leave your browser. All merging happens locally on your device using the pdf-lib JavaScript library. We don't store, upload, or access your documents in any way.
Is there a file size limit?
There's no hard limit, but very large files (100MB+) may be slow to process depending on your device's memory and processing power. For best performance, we recommend files under 50MB each.
Will the merged PDF preserve formatting?
Yes! The tool copies pages exactly as they appear in the source PDFs, preserving all text, images, fonts, and layouts. Your merged document will look identical to the originals.
Do I need to install anything?
No installation required. PDF Merge works directly in your browser — just open the page and start merging. Works on Chrome, Firefox, Safari, and Edge.