PDF

PDF Merger & Joiner – Combine PDF Files Online Free

Combine multiple PDF files into a single document. Reorder pages and download.

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Fast, secure & processed 100% locally in your browser

About Merge PDF

Merge PDF by Allin1xTools enables you to combine separate PDF files into a single consolidated document quickly and securely. Whether you are assembling quarterly reports, consolidating scanned receipts, merging chapters of an ebook, or bundling application documents, this tool gives you complete visual control over document sequence.

With in-browser processing powered by pdf-lib, all merging, page reordering, and numbering are completed directly on your device. Your sensitive financial statements and private records are never uploaded or stored.

How to Use the PDF Merger

Select or drag-and-drop two or more PDF files into the drop zone.
Reorder the documents using the Up and Down arrow buttons to arrange your desired page sequence.
Customize your output document name and optionally select page numbering formats (e.g. Page 1 of 10).
Click "Merge PDFs" to assemble the consolidated document in seconds.
Review the merge summary and click "Download Merged PDF" to save the file to your computer or phone.

Key Features

Intuitive Reordering: Easily shift files up or down to set the exact document order.
Page Numbering Options: Automatically stamp page numbers at the bottom-center, bottom-right, or bottom-left.
Multiple Number Formats: Support for simple numbers, "Page X of Y", brackets "[ X ]", and slash "X / Y".
Sample PDF Generator: Load instant pre-built test PDFs with one click to try the tool without uploading personal files.
Local Browser Execution: Files are loaded into memory and merged on your device without server transmission.

Frequently Asked Questions

Can I change the order of files before merging?

Yes. Each file item in the list includes Up and Down arrow controls so you can arrange your files in the exact sequence you want them to appear in the final merged PDF.

Can I add page numbers to the merged document?

Yes. You can enable automatic page numbering and choose position (bottom-center, bottom-left, bottom-right), font size, and format such as "Page X of Y" or "[ X ]".

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

You can merge up to 30 PDF documents in a single batch.

Are my PDF files safe?

Yes, 100%. The merge operation is performed on your computer or phone using JavaScript. Files are never transmitted over the internet or saved to cloud databases.