Merge PDF

Essential100% Client-Side Privacy

Combine multiple PDF files into one single document with custom page reordering.

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Upload PDF files to combine

Select multiple PDFs or drop them here. Reorder before merging.

Supported: PDF
No Server UploadsAll processing runs strictly in your browser memory
Instant & FreeNo signup, subscriptions, or watermarks
High-DPI QualityLossless and professional print grade output

How to Use Merge PDF

Follow these simple steps to process your files securely in seconds.

1

Select PDF Documents

Drag and drop two or more PDF files into the upload zone.

2

Arrange Document Order

Use the up/down arrows or drag cards to order the documents exactly how you want them merged.

3

Click Merge PDF

Our WebAssembly engine binds the document streams together directly in your browser memory.

4

Download Combined File

Download your merged PDF document with all original bookmarks and formatting intact.

About Merge PDF

Combine PDF Documents Securely in Your Browser

Most online PDF merger tools require uploading your sensitive tax documents, bank statements, legal agreements, or medical records to unknown remote servers.

OmniTools executes document merging 100% inside your local web browser using client-side JavaScript (pdf-lib). Your private documents never leave your laptop or phone.

Free & Unlimited usage
Zero server logging or storage
Full resolution & high-DPI output

Frequently Asked Questions (FAQ)

No hard limit! Because merging takes place in your browser memory, you can combine dozens of files as long as your device has enough RAM.