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PDF Merge Browser-first PDF processing in modern browsers.

Use PDF Merge when a form, application, client handoff, or record-keeping workflow needs one document instead of several separate PDF files. Add the PDFs, arrange them in the right order, and download a single merged file.

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This tool is designed to run directly in your browser with pdf-lib, so your PDF workflow stays local in a modern browser.

Combine Multiple PDFs Into One Document

Merge multiple PDF files into one document when pages are spread across separate exports, scans, forms, or attachments and you need one combined PDF.

The tool combines the uploaded PDFs in the order shown on the page and returns one merged PDF file.

How to use PDF Merge

1

Upload at least two PDF files.

2

Move files up or down until the order matches the final document.

3

Click Merge PDFs to build one combined PDF.

4

Download the merged PDF file.

Why this helps in real workflows

An application portal wants one PDF instead of several attachments.

A signed form and supporting pages need to become one document.

Scanned pages were exported as separate PDFs and should be delivered together.

A client or teammate wants a single combined PDF packet.

Common problems and fixes

The recipient asked for one PDF instead of multiple files.

Merge the PDFs into a single document before sending or uploading them.

The pages are in the wrong order across separate PDFs.

Reorder the files in the list before merging so the final document reads correctly.

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Related Guides

When to Merge PDFs Instead of Sending Separate Files Best File Format for Resume and Job Application Uploads When to Convert PNG to PDF

Frequently asked questions

How do I merge PDF files online?

Upload the PDFs, arrange them in the order you want, click Merge PDFs, and download the combined file.

Can I choose the page order before merging?

Yes. Move each file up or down in the list before merging so the final document follows the correct order.

Does this merge tool keep the original PDF pages intact?

Yes. The tool combines the existing PDF pages into one file without rasterizing them into images.

How many PDFs can I merge at once?

This first version supports up to 20 PDF files in one merge.

Is there a file size limit for merging PDFs?

This tool runs in the browser with pdf-lib, so very large PDF files may be limited by available browser memory. Most typical PDFs merge without issues.

Can I merge PDFs that have different page sizes?

Yes. The tool merges the pages as they are, preserving each page's original size and orientation in the combined output.

Do the PDF files leave my browser?

This tool is designed to run in the browser with pdf-lib, so the merge happens locally in a modern browser session.