Merge PDF Files Online
Merge PDF files online with PDFiva. Select two or more PDFs, arrange them with the up/down controls, and download one combined document.
Quick answer: Use PDFiva Merge PDF to combine two or more PDFs into one file. The final page sequence follows the order shown in the selected-file list.
Compress PDF
Reduce file size by converting pages to images. Searchable text, links, forms, and vector detail may not be preserved.
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What this tool does
Combine multiple PDF documents into one PDF in the order you choose. Useful for combining reports, invoices, scanned pages, application documents, or other related PDFs into one file.
How to use merge pdf files online
- Choose two or more PDF files.
- Review the selected files and remove any you do not want.
- Merge the files and download the combined PDF.
Browser-based processing
PDFiva's current tool workflow is designed to process the selected document in your browser. The front-end application does not include a PDFiva upload endpoint for this operation. Your device performs the work, so available memory, processor speed, browser support, and document complexity can affect processing time.
Before you download
Open the result and check important documents before sharing or submitting them. PDF files can contain forms, fonts, annotations, encryption, embedded content, and other features that vary from one document to another.
Frequently asked questions
How many PDFs can I merge?
The browser application accepts multiple PDF files. The practical limit depends on your device memory and the size and complexity of the documents.
Can I remove a PDF before merging?
Yes. The merge workflow lets you remove a selected file before creating the combined PDF.
Are my files uploaded?
The current front-end merge workflow processes the selected PDF bytes in the browser rather than sending them to a PDFiva server.
Troubleshooting merge problems
A PDF asks for a password: unlock it first with the correct password, then retry the merge.
The output differs from the source: a parser fallback may turn a page into an image. This can flatten that page and remove searchable text, links, forms or other interactive data. Inspect every page before relying on the result.
The merge fails: open each source file separately, remove damaged files, and retry with a smaller set. Keep the originals until the merged PDF is verified.
Related guide
For detailed steps and additional practical examples, read How to merge PDF files online.