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Choose two or more PDF files and arrange them in the order they should appear in the final document.
PDF Tool
Merge PDF Online
Combine multiple PDFs in the exact order you need.
Local browser processing
Files stay on your device
No account required
How to merge PDF files
Combine multiple PDF files into one document, arrange their order, and download the merged PDF without uploading files to a server.
Adjust the output
The file list shows page counts and file sizes so you can confirm the source documents before merging.
Create the PDF
Merging preserves the original pages and creates one new PDF for reports, applications, contracts, and document packets.
Private browser processing
All source files remain on your device because the merge runs with open-source browser libraries.
How to combine PDF files cleanly
A reliable PDF merge starts with the correct source order. Check each file name and page count first, then arrange the documents so the combined PDF reads naturally from the first page to the last.
Arrange files before combining them
Move source PDFs up or down until the list matches the final reading order. The complete pages from the first file are followed by the complete pages from the next file.
Combine PDFs with different page sizes
A merged document can contain Letter, A4, landscape, portrait, and custom-sized pages. Each copied page keeps its original dimensions rather than being forced onto one paper size.
Review document-level features
The visible page content is copied, but document-level bookmarks, portfolios, scripts, signatures, and complex form behavior may not transfer exactly. Keep the originals when those features matter.
Merge versus reorder
Use Merge PDF to join separate files. Use Reorder PDF Pages when you need to reorganize, rotate, delete, or duplicate pages inside one PDF.
Common ways to use this tool
These are practical examples of when this workflow is useful.
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Applications
Combine a cover letter, resume, portfolio, and supporting documents into one file.
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Monthly reports
Join recurring reports or statements into a single archive in chronological order.
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Contracts
Combine the main agreement with schedules, exhibits, and signed attachments.
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Project handoffs
Bundle specifications, diagrams, meeting notes, and approvals into one document.
Common mistakes
- Uploading only one PDF.
- Skipping the file order check.
- Trying to merge a damaged or unsupported encrypted document.
Merge PDF Online FAQ
How many PDFs can I merge?
You can merge multiple files, subject to the memory available in your browser and device.
Can I change the merge order?
Yes. Move each file up or down before creating the result.
Does merging reduce quality?
No. Standard PDF pages are copied into the new document without rasterizing them.
Can I merge PDFs with different page sizes?
Yes. Every page keeps its original size and orientation in the merged file.
Can I merge password-protected PDFs?
The browser must be able to read each source file. Remove the password or encryption first if a protected PDF cannot be opened.
Will bookmarks and form fields still work after merging?
Visible pages are preserved, but document-level bookmarks, forms, signatures, and scripts may not carry over reliably.
Why is the merged PDF larger than expected?
The result contains the data from every source document. Compress the merged PDF afterward if reducing file size is more important than preserving interactive content.