What is Merge PDF?
Merge PDF is a web utility that compiles multiple individual Portable Document Format (PDF) files into a single, unified PDF document. It resolves document fragmentation issues and lets you combine chapters, reports, or sheets into a single export.
How to merge PDF files
- Click the upload card or drag-and-drop multiple PDF files into the drag area.
- Adjust the file list order by clicking the Up and Down arrow buttons.
- Remove any unwanted documents by clicking the red trash delete button.
- Click Merge PDFs & Download to combine and download the combined file.
Benefits of Merge PDF
- High Performance: Leverages the powerful open-source `pdf-lib` script library to parse structure streams and splice pages locally inside the browser.
- Lossless Splicing: Combines your pages without re-rendering them, preserving vector fonts, link embeds, and original image resolutions.
- Browser Sandboxed Memory: Ensures absolute document privacy. None of your invoices, contracts, or tax documents are ever uploaded to any backend service.
Frequently Asked Questions (FAQ)
Can I merge password-protected PDF files?
No. Encrypted or password-secured PDF documents prevent our browser script libraries from accessing pages. You must decrypt and unlock them before uploading.
Is there a file size limit for merging?
There is no strict software limit on file sizes. However, because the entire merging process takes place within your browser's local sandbox, it depends on your machine's physical memory (RAM).