100% Private & Secure
Merging happens entirely on your device. Your PDFs are never uploaded to a server, never stored, and never shared.
Merge PDF Tool
Combine any number of PDFs into a single document in seconds. Drag to reorder pages, then download.
Drop PDF files here or click to browse files
Add multiple files at once · drag list items to set the merge order
Why Use Our PDF Merger
Merge in seconds, control the page order, and keep your files private.
Instant Results
No waiting. Files are processed instantly in your browser and the merged PDF starts downloading right away.
Drag to Reorder
Drag files up and down the list to set the exact page order of your merged document. It's all in your control.
How to Merge PDFs in 3 Steps
From start to download, it takes less than a minute.
Add your PDFs
Drag one or more PDFs into the dashed box, or click to browse local files. There's no limit on how many you add.
Set the order
Drag the files in the list until the order matches how you want the final document to read.
Download your file
Click Merge and the combined file is generated locally and downloaded automatically in seconds.
Online PDF Merger
PDF merging is a fully web-based tool that combines multiple PDFs into a single document right in your browser. It uses the PDF-lib library to copy the pages of each source file in the order you set, assembling them into one clean, unified PDF. There is no server, no upload, and no registration — everything happens locally on your device.
Sending one document as several separate PDFs is clumsy and confusing for the recipient. Whether you want to combine scanned pages into a single contract, join several slide exports into one full presentation, or compile each month's reports into a yearly summary, our tool does it in seconds. And because your files never leave your device, it's also the safest option for confidential documents.
Common Merging Use Cases
- Combine scans — gather scattered scanned pages into one tidy file that's easy to send.
- Merge presentations — join multiple slide PDFs into a single deck for easy review.
- Compile reports — bring monthly, quarterly or chapter-based files together into one archive.
Why It's Better Than Desktop Software
- Works anywhere — no installation needed; opens directly on Windows, macOS, Linux, iOS and Android.
- Zero privacy risk — files are processed locally and never sent over the network.
- Fidelity preserved — every page keeps its original size, orientation and quality.
PDF Merging FAQ
Answers to the most common questions about merging PDF files online.
Will my files be uploaded to a server?
No. Your files are processed entirely on your own device and are never sent to any server, so your documents remain only on your computer.
Can I merge PDF pages with different sizes and orientations?
Yes. Every source page keeps its original size and orientation when copied into the merged document, so pages of different formats combine perfectly.
Can I reorder files before merging?
Yes. Simply drag the files up and down the list to set the final page order, then click the Merge button.
Will merging reduce the quality of my PDF?
No. Merging only copies the original pages and objects into a new document without re-compressing anything, so text and images keep their original, highest quality.
Is there a limit on files or pages?
You can merge as many files as you like. Very large documents are processed using browser memory, so combining a huge number of files may take a little longer.