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Merge PDF Files Online
Combine several PDFs into a single document in the order shown in the upload list. Use it to assemble reports, chapters or scanned records without rewriting their page content.
Active conversion station
Merge PDFs
Combine multiple PDFs
How to merge PDF documents
Prepare the source
Select the PDFs to combine.
Review the settings
Review the file order and remove any unintended documents.
Check the result
Start Conversion and verify the total page count in the merged PDF.
Supported formats and limitations
Input: PDF. Output: PDF. Different page sizes can remain in one PDF. Review bookmarks, links and forms; unlock protected inputs first when you know the password.
Processing runs on the server after you select Start Conversion. The interface accepts files up to 500 MB; service and connection limits can be lower. No installation or account is required. Read our file processing privacy policy.
Why Use ConvertFast's Merge PDFs?
- Combine whole documents into one PDF.
- Keep each source PDF unchanged on your device.
Frequently Asked Questions
Can I merge PDFs with different page sizes?
Yes, pages can retain different dimensions in the combined document. Check orientation and printing settings afterward.
Does merging reduce the file size?
Merging combines documents. Use Compress PDF separately when you need to reduce the result size.
Ready? It's Free.
No account required. Input rules appear before you upload.
Open Merge PDFs ToolNeed more detail? Read the step-by-step Merge PDFs guide.