Merge PDF Files
Merge two or more PDF files into a single PDF. Arrange the files with the up and down arrows; all pages of each file are added in that order.
Drop PDF files here
Select 2 or more PDF files to merge (you can add more in several batches)
Max 20 files, up to 50.0 MB each
About the PDF Merger
The merger joins two or more PDF files into a single PDF. Add the files, put them in the order you want with the up and down arrows, and click Merge. Every page of the first file comes first, followed by every page of the second file, and so on. Pages are copied with pdf-lib exactly as they are, not converted to images, so text stays selectable, page sizes and orientations are kept, and images keep their full quality. The merged file is roughly the size of the inputs combined.
The order is set per file, not per page. If you need to rearrange individual pages after merging, open the result in the PDF Editor and drag the page thumbnails, or use the PDF Splitter first to pull out only the pages you need. You can add files in several rounds: each new selection is added to the end of the list, so you can collect documents from different folders before merging.
A practical example: a job application asks for a single PDF containing your CV, a cover letter and two certificates. Add all four files, move the cover letter to the top, then the CV, then the certificates, and merge. If a certificate is a photo, convert it first with JPG to PDF. If the portal has an upload size limit and the merged file is too big, run it through Compress PDF.
How to use the PDF Merger
- 1
Add your PDFs
Drop PDF files on the drop area or click Browse Files. Up to 20 files per selection, each up to 50 MB; you can add more in further selections.
- 2
Arrange the order
The list shows the merge order. Use the up and down arrows to move a file, or the bin icon to remove it.
- 3
Merge
Click Merge N PDFs. If a file cannot be read, a message names it so you can remove or unlock it.
- 4
Download
Click Download Merged PDF to save the combined file as merged.pdf. The result shows its size and page count.
What it can do
Lossless page copying
Pages are copied with their fonts, images and vector graphics, so nothing is re-compressed or turned into an image.
Order you control
Reorder files with the arrow buttons before merging; the numbers beside each file show its position.
Mixed page sizes
A4, Letter, landscape and other page sizes can be merged; each page keeps its own size and orientation.
Clear errors
A damaged or password-protected file is reported by name instead of the merge silently failing.
Limitations
- Bookmarks and document metadata from the source files are not kept, and internal links between pages and fillable form fields may no longer work.
- Files are ordered as whole documents; reordering single pages needs the PDF Editor.
- Password-protected PDFs, and PDFs with usage restrictions, must be unlocked first with the PDF Password tool.
- Very large merges are limited by your device’s memory, since every file is held in the browser while merging.
Privacy
The PDFs are read and merged by JavaScript in your browser; none of them is uploaded to FlexyPdf’s servers.
Frequently asked questions
Can I change the order of the files?
Yes. Before merging, use the up and down arrows next to each file; the number on the right shows where it will appear. The list order is used exactly as shown.
Will merging reduce the quality of my documents?
No. Pages are copied as PDF content, not rendered to images, so text, images and drawings are identical to the originals.
Why does it say one of my files is password-protected?
That PDF is encrypted, either with an open password or with restrictions on editing. The merger cannot read pages from encrypted files, so remove the protection with the PDF Password tool (you need the password if one is required to open it) and add the unlocked copy.
How many files can I merge?
Up to 20 files per selection, and you can keep adding more selections to the list. The practical limit is your device’s memory: dozens of ordinary documents are fine, while several very large scanned files may be slow.
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