Merge PDFs

Combine multiple PDF files into a single document

Drag PDF files here

Or click to select files

Select PDFs

How to use

Select or drag multiple PDF files
Order files using the arrows ⬆️⬇️
Click "Merge PDFs" to combine all documents
The final file will download automatically

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Free Online Merge PDFs

Combine two or more PDF files into a single document right in your browser. Unlike most online tools, your PDFs are never uploaded to a server: merging happens locally using the pdf-lib library, so sensitive documents (contracts, invoices, records) never leave your computer. You can reorder the files before merging them.

Why use Merge PDFs

Your PDFs are processed in your browser: never uploaded to a server
Merge as many files as you need, with no artificial limit
Reorder documents (move up/down) before combining them
No watermark, no page limit
Download the result instantly, no processing queue to wait for

How to use it in 3 steps

1
Upload your PDFs
Drag and drop or select the PDF files you want to combine.
2
Put them in order
Use the arrows to move each file up or down until you have the final order you want.
3
Merge and download
Click merge and download the resulting PDF instantly.

Questions about Merge PDFs

Is it safe to merge PDFs with confidential information?

Yes. The file is never uploaded to a server — merging happens entirely in your browser using JavaScript. That's a key difference from tools that process your documents in the cloud.

Is there a limit on files or size?

There's no artificial limit on the number of files. The real limit depends on your device and browser memory — very large PDFs or many files at once may take longer to process.

Can I change the order of the PDFs before merging?

Yes, every file you upload has buttons to move it up or down in the list before generating the merged PDF.

Do I lose quality or formatting when merging?

No. The tool combines the original pages as-is, without recompressing or converting to images, so text stays selectable and quality doesn't change.

Is Merge PDFs free?

Yes, Merge PDFs from WebHerramientas is 100% free. No registration or subscription required. You can use it as many times as you need at no cost.

Is it safe to use Merge PDFs online?

Yes, all information is processed directly in your browser. We do not store or send your data to any external server.

Does Merge PDFs work on mobile?

Yes, the tool is fully responsive and works on any device: phone, tablet or computer with a modern browser.