Merge PDF
Combine multiple PDF files into a single document. Free, fast, and private.
How to use Merge PDF
Using Merge PDF is quick and simple. Upload your file using the upload zone above — drag and drop it directly or click to browse your files. The tool works entirely in your browser, so your files never leave your device and nothing is uploaded to any server. Once you have your file loaded, adjust the settings to your preference and click the process button. Your result will be ready to download in seconds. All processing happens client-side using modern browser APIs, ensuring complete privacy and fast performance even for large files.
Frequently Asked Questions
How many PDFs can I merge at once? +
There is no limit. You can merge as many PDF files as you need. The only constraint is your device memory, which can handle dozens of PDFs at once.
Can I reorder the PDFs before merging? +
Yes. After uploading, you can drag and drop the files in the list to rearrange them in any order before merging.
Will merging preserve hyperlinks and bookmarks? +
Yes, pdf-lib preserves the page content including text, images, and embedded fonts. Some complex interactive elements may vary.
Is there a file size limit per PDF? +
No server limits apply since everything runs in your browser. Very large files are limited only by your device RAM.
Are my files private? +
Completely. Nothing is uploaded anywhere. All merging happens locally in your browser using JavaScript.
Your files never leave your device. All processing happens in your browser. No data is sent to any server.