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Merge PDF

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Combine multiple PDF files into one, in any order you choose.

100% Client-Side Processing • Your Data Never Leaves Your Browser

About Merge PDF

Combine two or more PDF files into a single document. Add your files, drag them into the order you want, and merge — the page order, formatting, and content of every source file is preserved exactly.

Useful for assembling a single report from separate chapters, combining scanned pages into one document, or joining invoices before archiving. Everything runs locally in your browser using pdf-lib, so your documents are never uploaded to a server.

Key Features

Drag to reorder files before merging
Combine any number of PDFs into a single file
Preserves page content and orientation exactly
Runs 100% in your browser — files are never uploaded

Frequently Asked Questions

Is there a limit on how many PDFs I can merge?

No hard limit — everything is processed in your browser's memory, so very large batches are limited only by your device's available RAM.

Are my files uploaded anywhere?

No. Merging happens entirely client-side using the pdf-lib library; your files never leave your device.