PDF Merger Online – Combine PDF Files Free

Merge multiple PDF files into one document, reorder files and individual pages, rotate or remove pages, then download the result. Processing happens in your browser.

🔒 Local browser processing ✓ No signup ✓ No watermark ✓ Free to use

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Drop PDF files here

or click to choose multiple PDF files

Up to 20 files per session • Up to 100 MB per file • Browser memory still applies

🔒 Private by designPDF content is processed locally in your browser.

↕️ Reorder pagesBuild the final PDF in exactly the order you need.

✂️ Remove pagesDelete unwanted pages before export.

↻ Rotate pagesFix sideways scans before merging.

How to merge PDF files online

1Select PDFs
Choose two or more PDF files or drag them into the tool.

2Arrange files
Move files up or down to set their document order.

3Edit pages
Drag pages, rotate pages, or remove pages you do not need.

4Merge & download
Create one PDF and download it directly to your device.

Why use this free PDF merger?

People merge PDFs for invoices, receipts, assignments, reports, applications, contracts, scanned documents, portfolios and business records. The useful part is not only combining files—it is getting the final page sequence right before the PDF is created.

This 5iTech PDF merger is designed around that workflow: add files, arrange them, inspect the pages, make page-level changes, and export one PDF. It works in a modern browser without requiring a desktop PDF editor.

Is the PDF merger private?

PDF files are read and processed in your browser by the tool. The page does not send your PDF contents to a 5iTech conversion server. The JavaScript libraries used by the tool are loaded from public CDNs, so an internet connection is required to load the page and libraries.

What can you do before merging?

Reorder complete PDF files.
Reorder individual pages across the uploaded PDFs.
Rotate individual pages by 90°.
Delete unwanted pages.
Add more PDFs without starting over.
Download the final PDF without a watermark.

Large PDF files and browser limits

This is a browser-based PDF merger, so practical limits depend on your device, browser memory and PDF complexity. The tool allows up to 20 files and 100 MB per file, but very large or highly complex documents may require more memory and processing time. For a smoother experience, close unused browser tabs before merging large document sets.

Frequently asked questions

Can I merge multiple PDF files into one?

Yes. Select multiple PDFs, arrange their order, adjust individual pages if needed, and choose Merge & Download PDF.

Can I reorder PDF pages before merging?

Yes. The page grid lets you drag pages into a different order. You can also rotate or remove individual pages.

Can I add another PDF after uploading files?

Yes. Use Add More PDFs. The existing files and page order remain in the workspace.

Does the tool upload my PDFs?

The merger processes the PDF data in your browser rather than sending it to a 5iTech conversion server. CDN-hosted JavaScript libraries are still needed to load the tool.

Can I use the PDF merger on a phone?

Yes, on modern mobile browsers. For very large PDFs, desktop devices may provide more memory and a smoother experience.

Will merging reduce PDF quality?

The merger copies PDF pages into a new document instead of rendering every page to an image. It is designed to preserve the page content rather than recompressing it as screenshots.

What if a PDF is password protected?

Password-protected or encrypted PDFs may not be readable by the browser PDF library. If the tool reports that a file cannot be processed, use an unlocked copy that you are authorized to edit.

More free 5iTech tools

5iTech PDF Merger is a browser-based utility. Keep a copy of important source files before making document changes.