Merge PDF Files

How to use this tool

1. Choose two or more unencrypted PDF files, or load the sample PDFs.
2. Move files up or down until the list is in the order you want.
3. Choose Merge PDFs, then download and check the combined document.

Combine documents in a deliberate order

Select two or more PDF files to build one document containing their pages in sequence. This is useful for bringing together separate reports, receipts, application documents or exported chapters. The visible list shows each filename, its page count and its source size. Use the up and down controls to change file order, and remove an item when it should not be included. Pages inside each source remain in their original order. Selecting more files appends them to the list after validation. Choose Merge PDFs when the list matches your intended reading order, then save the new download. Your source files remain unchanged.

Preserve the page layout

This merger copies PDF page objects into a new PDF rather than rendering each page into a screenshot. Original page dimensions and rotation are retained, so A4 pages can coexist with Letter pages or differently sized diagrams in the same result. Existing page text and vector graphics can remain text and vectors. An image-only scan remains an image-only scan: the tool does not perform optical character recognition or invent a searchable text layer. It also does not compress a document to a target file size. The result can be larger or smaller than the sum of the inputs because the PDF structure is rewritten.

Understand compatibility and document features

Each input must be an unencrypted PDF with at least one readable page. Password-protected and encrypted documents are rejected; this tool does not request passwords or remove protection. Rewriting a document invalidates its original digital signatures, so retain signed originals when signature verification matters. Document-level features such as forms, bookmarks, portfolios, attachments and accessibility tags are not guaranteed to transfer correctly. This is a page merger rather than a full document preservation system. Open the downloaded document in your usual PDF reader and inspect its page count, order, selectable text and any interactive elements before sharing or submitting it.

Work within the browser limits

Choose at most 20 PDF files, with no more than 25 MB and 300 pages in an individual source. The combined source budget is 75 MB and 500 pages. These are decimal megabytes, where one MB equals one million bytes. Complex documents can still exceed available browser memory below these ceilings; try a smaller batch if your device struggles. Files are parsed and combined locally without a processing upload or account. The sample button generates two small PDF documents on your device so you can test reordering and downloading first. Clear removes the current file list and result. Downloaded files remain under your operating system’s control.