PDF Tools
Merge PDF
Use this Merge PDF tool to upload multiple PDF files, arrange them in the order you want, and generate one merged PDF directly in your browser. Files stay local to your device during processing.
PDF merge uploader
Upload multiple PDF files, reorder them, and merge them into one downloadable document directly in your browser.
Merged PDF
Merge your files
Upload PDF files, arrange the order, and generate one combined PDF without sending anything to a server.
Merged output is still based on the source PDFs you provide. File size, internal metadata, bookmarks, forms, and some advanced PDF features can vary after merging.
PDF files queued
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Known total pages
Scanning
Source PDF size
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Merged file size
Not generated yet
Need the full PDF cluster? Visit the PDF tools hub.
How this calculator works
This tool loads each selected PDF in the browser, copies the pages in your chosen order, and writes them into one merged output file. That makes it useful for combining forms, invoices, scanned sections, slide exports, and multi-part document bundles.
Because the work happens locally, your files are not uploaded to a server during the merge. You can also use the Split PDF guide and the PDF tools hub to compare related document workflows.
What the result means
A successful result means the merged PDF is ready to download. The summary shows how many source PDFs were combined, the known page count where available, and the approximate size of the output file.
That helps you sanity-check whether the combined document is still practical for sharing or uploading. If file size is a concern, the PDF File Size Estimator can help you think through the likely tradeoffs.
Important limitations
This is a practical browser-based merge workflow, not a full PDF editing suite. Advanced PDF features such as bookmarks, forms, embedded attachments, internal metadata, and other specialized document structures may not carry over exactly as they appeared in every source file.
It is also not a server-side archival workflow. For very large or highly specialized PDFs, browser memory limits can still matter.
When to use this calculator
Use Merge PDF when you want to combine multiple existing PDFs into one file for review, sharing, printing, or submission.
If you need the opposite workflow, where one large file is broken into smaller pieces, use Split PDF.
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FAQs
Are my PDFs uploaded to a server during merging?
No. Files are processed locally in your browser and are never uploaded by this tool.
Can I reorder the PDFs before merging them?
Yes. You can move files up or down so the final merged PDF follows the order you want.
Will all PDF features stay identical after merging?
Not always. Core pages usually merge well, but advanced features such as bookmarks, forms, metadata, or attachments can vary.
Can I merge more than two PDF files?
Yes. You can merge multiple PDF files into one downloadable output.
Is this tool giving legal or professional document advice?
No. It is a browser-based utility tool only and does not provide legal, compliance, or records-management advice.