Merge PDF
Combine multiple PDF files into one PDF in the order you choose.
Use Merge PDF
How to use this tool
- Select the PDF files you want to combine and review their order in the file list.
- Select Process file to copy the pages into a single document.
- Open merged.pdf and check that every page is present in the intended order.
Check the order before sharing
The merger appends every page of each selected file. If the order is wrong, select the files again and verify the output. The current interface does not include drag-and-drop page reordering. Keep the source files until you have checked the merged copy.
Example
Merging a two-page introduction followed by a five-page report creates a seven-page PDF.
Questions about this tool
Does merging reduce file size?
Merging combines documents. It is not a compression operation, and the combined file can be larger than any individual source.
Can I merge a password-protected PDF?
This interface has no password-entry step. Use an unlocked copy that you are authorized to open if the file cannot be loaded.
Related tasks
About Merge PDF
Combine multiple PDF files into one PDF in the order you choose with a focused online interface designed to help you complete this task quickly on Costovia.
How to use Merge PDF
- Choose the PDF or supported source files requested by the tool.
- Select the pages or processing options that apply to your task.
- Process the file and open the result to verify page order, quality and readability.
Example
Example: use a sample input first to confirm that Merge PDF produces the format or result you expect before processing important content.
What to check
PDF results can vary with source files, fonts, encryption and browser limits; always review the downloaded file before relying on it.
Frequently asked questions
What does Merge PDF do?
Combine multiple PDF files into one PDF in the order you choose.
How do I use the merge PDF?
Enter the values, text or files requested by Merge PDF, choose any relevant options, run the tool, and review the result before copying or downloading it.
Does Costovia upload my PDF to a third-party service?
Processing behavior depends on the specific tool. Review the page privacy note and always check the output before using sensitive documents.
Related tools
Merge PDF checklist
Arrange files in the intended order before merging, then open the finished PDF to verify page sequence, orientation and completeness. For sensitive documents, follow the privacy and security requirements of the organization handling the files.
Reviewed 30 September 2026.