How does the PDF merge tool work?

Upload two or more PDF files, arrange them in the order you want, and the tool combines them into a single PDF with all pages in sequence.

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

The tool is designed for practical document workflows. Very large or heavily encrypted PDFs may slow processing — for best results use standard office-sized PDF files.

Does the merge preserve bookmarks and annotations?

Basic page content is preserved during merge. Complex bookmarks, interactive form fields, and digital signatures may not survive merging depending on the source PDF structure.

Are my PDF files stored after merging?

Avoid uploading PDFs containing confidential contracts, financial records, or personally identifying information to public tools. Use internal approved systems for sensitive documents.

PDF Tool

Merge PDF

Combine multiple PDF files into a single document. Upload your files and arrange them in the order you want.

PDF → PDF

Upload

Merge PDF

Drop PDF files here or click to browseSelect 2–20 PDF files · Max 30 MB each

How it works

Merging PDFs

Upload 2–20 PDF files and click Merge. Files are combined in the order shown.

Use ↑ ↓ arrows to reorder files before merging
Click × to remove a file from the list
Drop new files to replace the current selection
Max 20 files · 30 MB each

All pages and formatting are preserved in the output.

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Extract specific pages from a PDF into a new document using a page range like 1-3, 5.

Tool guide

How to merge PDF files

Use the PDF merger to combine separate PDF files into one cleaner document for applications, reports, receipts, or document sharing.

Last updated: June 5, 2026

Maintained by: Chhun Menghong

Recommended workflow

Upload the PDF files you want to combine and arrange them in the final reading order.
Merge the files, then open the result to check page order, orientation, and completeness.
Download the final PDF and keep the original files until the merged version is verified.

Before relying on the result

Do not upload confidential, legal, medical, banking, or identity documents unless you are comfortable processing them in a browser tool.
Check file size limits before sending the merged document by email or through an online form.
Use authorized documents only and keep required signatures or stamps intact.

Related guides

Merge PDF files online

Help & answers

Frequently Asked Questions

Important disclaimer: Alexonic Tools is completely free to use. There is no charge, and we do not save tool inputs or generated results. We value customer privacy and keep building and fixing each day. Always verify important financial, payroll, legal, tax, business, or production-code results before relying on them. If you see an issue, need a tool, or require an update, send feedback to the developer.