Arrange your PDF files before merging
The merged PDF follows your document order from first to last. Put the cover, main document, appendices, certificates, or supporting files in their final reading sequence before you press Merge.
Merge PDF Files Online
Combine complete PDF documents in your chosen order.
About Merge PDF
Merge PDF is a free online PDF merger for combining multiple PDF files into one document. Instead of sending several separate files, you can upload your PDFs, arrange them in the order you want, and create one merged PDF that is easier to store, share, print, or submit.
The tool is designed for whole-document PDF merging. Each uploaded PDF stays together as a complete unit and is appended according to the order shown in the workspace. This makes it useful for combining reports with appendices, contracts with exhibits, scanned documents, invoices, assignments, certificates, and other document bundles. If you need to reorder or edit individual pages, use Organize PDF Pages instead.
You can merge between two and 20 PDF files in one request. Each file may be up to 50 MiB, while the combined size of all PDFs cannot exceed 100 MiB. These limits are checked before processing to prevent unsupported merge jobs.
The merger preserves visible page content including text, images, vectors, fonts, dimensions, existing rotation, hyperlinks, and supported text annotations. Document-level features such as bookmarks, interactive forms, embedded attachments, and original metadata are not preserved. Editing or merging a digitally signed PDF can also remove or invalidate its existing signature.
Merge PDF works through your browser without requiring dedicated PDF merge software. The actual merge is processed server-side. Files are temporarily retained only as needed to process your request and provide the result. Some tools may retain files for up to 24 hours until the next scheduled cleanup.
New to How to Merge PDF Files?
Learn how to combine complete PDF files in the right order, understand merge limits, and avoid common document-assembly mistakes.
Help & Tips
Get the best results from Merge PDF
Use Merge PDF for complete documents
This tool appends whole PDF files. If you need to move individual pages between documents, rotate pages, remove pages, or build a custom page sequence, use Organize PDF Pages instead.
Check your combined upload size first
You can add up to 20 PDFs, with a maximum of 50 MiB for each file and 100 MiB across the complete merge request.
Keep originals of digitally signed PDFs
Merging changes the PDF document structure and can invalidate an existing digital signature. Preserve the signed originals whenever signature verification matters.
Name source files clearly before uploading
Descriptive filenames such as 01-cover, 02-report, and 03-appendix make it easier to confirm the final order when merging several documents.
Compress the merged PDF afterward if needed
Merging combines existing documents but is not intended to significantly reduce their total file size. If the final PDF is too large for email or an upload portal, run it through PDF Compressor afterward.
How to Merge PDF Files Online
Combine multiple PDF files into one document in three simple steps
1
Upload Your PDF Files
Choose or drag in two to 20 PDF files. Each file can be up to 50 MiB, with a maximum combined input of 100 MiB.
2
Arrange the PDFs
Move complete documents into the exact order you want them to appear in the merged PDF.
3
Merge and Download
Start the merge, then download one PDF containing all of your documents in the selected order.
Why Choose Our Free PDF Merger
Merge multiple PDFs in your chosen order
Combine reports, assignments, invoices, contracts, scans, and other complete PDF documents into one organized file without managing every page individually.
Built-in file validation
The workspace checks the number of PDFs, individual file sizes, and total upload size before processing so unsupported requests can be caught early.
Preserves existing page content
Visible text, images, vectors, fonts, page dimensions, source rotation, hyperlinks, and supported text annotations remain intact in the merged PDF.
Perfect For
Reports & Appendices
Merge a report, supporting research, references, and appendices into one PDF in reading order.
Contracts & Exhibits
Combine agreements and supporting exhibits into one convenient document package.
Scanned Documents
Join separately scanned forms, records, receipts, or paperwork into a single PDF.
Applications & Submissions
Combine completed documents, certificates, supporting material, and other PDFs into one upload-ready file.
Frequently Asked Questions
How do I merge PDF files into one PDF?+
Upload two or more PDF files, arrange them in the order you want, and select Merge PDF. The tool combines each complete document from first to last and gives you one merged PDF to download.
Is this PDF merger free to use?+
Yes. You can use the Merge PDF tool to combine supported PDF files without purchasing PDF merging software. Upload your documents, arrange them, merge them, and download the combined PDF.
How many PDF files can I merge at once?+
You can merge up to 20 PDF files in one request. Each PDF may be up to 50 MiB, and the combined size of all uploaded files cannot exceed 100 MiB.
Can I merge multiple PDF files in a specific order?+
Yes. Arrange the uploaded PDF cards before starting the merge. The final document follows that order from the first PDF to the last.
Can I merge two PDF files?+
Yes. The tool works for as few as two PDF files and supports up to 20 files in one merge. Upload both PDFs, place them in the required order, and combine them into a single PDF.
Can I rearrange individual PDF pages while merging?+
No. Merge PDF combines complete documents and keeps the pages inside each source PDF together. If you need to reorder, rotate, remove, or duplicate individual pages, use Organize PDF Pages instead.
Will merging PDFs change the page quality?+
The merger preserves the existing visible page content rather than rasterizing every page into a new image. Images, vectors, fonts, page dimensions, source rotation, hyperlinks, and supported text annotations remain part of the merged document.
What happens to bookmarks, forms, attachments, and metadata?+
Visible page content, hyperlinks, and supported text annotations are preserved, but bookmarks, interactive forms, embedded attachments, and document metadata are not preserved by the current merge workflow.
Can I merge digitally signed PDF files?+
You can process supported PDFs that contain signed content, but editing or reconstructing a PDF can remove or invalidate an existing digital signature. Keep the original signed documents if signature validity matters.
Can I merge PDF and JPG or Word files together?+
Not with this tool. Merge PDF is designed specifically for combining complete PDF documents. Convert JPG, PNG, Word, or other source files to PDF first, then add the resulting PDFs to the merger.
Can I merge PDF files on Windows or Mac?+
Yes. Because the tool runs through your web browser, you can use it from supported browsers on Windows, macOS, and other desktop systems without installing dedicated PDF merge software.
Are my PDF files kept permanently?+
No. Files are temporarily retained only as needed to process your request and provide the result. Some tools may retain files for up to 24 hours until the next scheduled cleanup.
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