Best PDF Merger Tools in 2026

EveryPDFTool: merge up to 20 PDFs

The current backend accepts at least two and up to twenty PDF files. It reads each document in order and appends its existing pages to one output file.

Password-protected PDFs are not currently supported, so encrypted documents need to be unlocked first when you have the correct password.

PDFsam Basic: local and open-source merging

PDFsam Basic is free and open source and processes files locally on Windows, macOS and Linux. It allows files to be arranged before merging and is particularly useful when documents should remain on the computer.

PDF24

PDF24 provides both online and desktop PDF merging. Its browser workflow allows files to be arranged before combination and also provides page-level organization tools.

Smallpdf and iLovePDF

Smallpdf and iLovePDF provide browser-based merging as part of larger PDF suites. Both support arranging documents before the final merge, making them practical when order needs to be checked visually.

Does merging reduce quality?

EveryPDFTool does not intentionally convert pages into images during a normal merge. Existing PDF page objects are copied into the output, so the operation is fundamentally different from flattening or rendering a PDF to JPG or PNG.

Prepare the files before merging

Use Remove PDF Pages if a source document contains pages you do not want. Use Rotate PDF for incorrect orientation and Reorder PDF Pages when the page sequence inside one source file needs correction.

File order determines the final document order

When several PDFs are being combined, verify their sequence before starting the merge. EveryPDFTool processes the supplied files in order and appends the pages from each document to the output. A report uploaded before its cover page will therefore remain before the cover page unless the file order is corrected first.

When merging is better than copying pages manually

Merging is useful for assembling application packets, invoices, reports, scanned records, contracts and supporting documents that currently exist as separate PDFs. Instead of sharing several attachments, the documents can be delivered as one continuous file. For property transaction packets and related document workflows, see our PDF tools for real estate guide.

Scanned and digital PDFs can be mixed

A PDF may contain selectable digital text, scanned page images or a mixture of both. Because the merge operation works with existing PDF pages, a scanned document can be placed next to a digitally generated document in the same output file without first converting one format into the other.

Merge and reorder solve different problems

Merge PDF combines separate files. Reorder PDF Pages changes the sequence of pages already inside one PDF. If the source files themselves contain pages in the wrong order, fix those files first and then perform the merge.

Check the combined file before sending it

After merging, quickly verify the first and last page of each source document and confirm that no unwanted blank or duplicate pages were included. This is especially useful for scanned document packets where accidental blank pages can easily be carried into the final PDF.

Merge first or compress first?

For most ordinary workflows, assemble the correct final document first and then use Compress PDF only if the merged result is larger than the destination allows. That avoids separately compressing several documents when the final size may already be acceptable.