Merge PDF

Combine multiple PDF files into a single document. Drag to reorder, remove files you don't need, and download the merged PDF — all in your browser. No upload, no signup, no watermark.

Drop PDF files here

or click to select from your device

Select multiple files · Max 50 MB per file

How to Merge PDF Files

  1. Drop two or more PDF files onto the upload area.
  2. Drag the file cards to set the merge order.
  3. Click "Merge PDFs" — the files are combined in your browser.
  4. Click "Download Merged PDF" to save the result.

Why Your Files Stay Private

The merge runs entirely in your browser using the pdf-lib library. No PDF is uploaded to a server, stored, logged, or shared. You can disconnect from the internet after the page loads and the merger will still work. Unlike most online PDF mergers, your documents never leave your device.

Merge PDF vs Other PDF Tools

Merge PDF combines multiple PDF files into one continuous document, preserving the order you set.

Other PDF operations — splitting, compressing, or converting — are different. If you need to extract pages or reduce file size, use a dedicated tool. This tool is built specifically for combining files.

Frequently Asked Questions

Is this PDF merger free?

Yes — completely free, no signup, no watermark, no page limit. The merge runs in your browser, so there is no server cost per document. Combine as many PDFs as you need.

Does merging PDFs reduce quality?

No — merging preserves the original content of each PDF. The pages are copied into a new document without re-encoding or compression. Text, images, and formatting remain exactly as they were in the source files.

Can I reorder files before merging?

Yes — drag the file cards in the list to reorder them. The merged PDF follows the order of the list. This is important because reordering after merging means starting over.

Is there a limit on how many PDFs I can merge?

There is no hard limit, but browser memory is the practical constraint. A typical batch of 10–30 PDFs works fine. For hundreds of files or very large documents, the browser may slow down. Split the files into smaller groups if needed.

Does this work on mobile?

Yes — the tool runs in any modern mobile browser. You can select PDFs from your device, reorder them (drag may be limited on some mobile browsers), and download the merged result. For the best experience, use a desktop browser.

What if a PDF is password-protected or corrupted?

The merger cannot open password-protected PDFs. If a file is corrupted, the merge may fail or produce an incomplete result. Remove any password protection or repair the file before merging. The tool will alert you if a file cannot be processed.

Related Tools