pdf tool
PDF Merger
Merge multiple PDF files into one.
Add PDF files
Drop your PDF files here, or click to browse. You can add multiple files and arrange them before merging.
How to Merge PDF Files Safely
Our PDF Merger allows you to combine multiple PDF documents into a single file directly in your browser. This tool is built specifically with user privacy and speed in mind.
100% Private Processing
Unlike most online PDF tools that upload your files to remote servers, our tool uses modern WebAssembly (Wasm) and JavaScript APIs to merge your documents locally. Your data remains strictly on your machine.
Lightning Fast
Because there are no upload or download times, merging even hundreds of pages happens almost instantly. You can easily drag, drop, and rearrange files in seconds.
Frequently Asked Questions
Is it safe to merge confidential PDFs?
Yes. Because our tool uses your browser's local processing power, your confidential files are completely safe. They are never uploaded to any remote server.
Is there a limit on the number of PDFs I can merge?
There is no hard limit on the number of PDFs you can merge, but performance depends on your device's memory. Merging dozens of moderate-sized files usually works seamlessly in modern browsers.
Does merging PDFs affect their quality?
No, merging PDFs simply combines the existing pages into a new document structure without modifying or compressing the original text, images, or formatting.