Merge PDF files online with local processing

Use this PDF merger when you need one combined document from separate contracts, reports, receipts, scans, or form exports. Add two or more PDFs, arrange the order, preview the merged result, and download the final file without sending documents to a server.

Common PDF merge workflows

• Combine reports, invoices, scanned pages, application forms, contracts, or receipts into one PDF.
• Reorder uploaded PDF files before merging so the final document follows the correct sequence.
• Process confidential documents locally in the browser instead of uploading them to a remote PDF service.
• Preview the merged PDF and download the final file for email, archiving, printing, or submission.

Related PDF and document tools

PDF merge FAQ

How many PDF files can I merge?

The tool is designed for small and medium browser-based merge jobs. Very large PDFs may be limited by your device memory, so split the work into smaller batches if the browser becomes slow.

Are my PDF files uploaded?

No. PDF merging runs in your browser, and the selected files are not uploaded to BaseToolbox or a remote API.

Can I change the PDF order before merging?

Yes. Add the PDF files, arrange them in the desired order, and then merge so the combined document follows that sequence.

Can I preview the merged PDF before downloading?

Yes. After merging, use the preview area to check the combined document before saving the output file.

Is merging PDF files the same as compressing PDF files?

No. Merging combines separate PDF files into one document. Compression reduces file size. If your final PDF is too large, compress source images before creating or merging PDFs.