LocalKit

PDF Merger

Combine multiple PDF files into one. Reorder files before merging, then download the result — no upload, no sign-up, no file size limit.

Your files never leave your device. All processing happens in your browser.

Drop PDF files here, or click to browsePDF files only · multiple files accepted

How to Merge PDFs

  1. Add your PDFs. Click "Drop PDF files here" or drag them onto the upload area. You can add multiple files at once, or add them in batches.
  2. Reorder if needed. Each file appears as a row with its name and page count. Use the ▲ and ▼ arrows to change the order — the final document follows this sequence.
  3. Merge. Click the Merge button. The browser combines all pages in order. For large files this may take a few seconds.
  4. Download. Click "Download merged PDF" to save the result.

Common Use Cases

  • Combining scanned documents. A multi-page form scanned one page at a time becomes a single coherent file.
  • Assembling a portfolio or report. A cover page PDF, a body PDF, and an appendix PDF merged into one document before sending.
  • Joining monthly statements. Bank or credit card statements across multiple months combined for an accountant or tax preparer.
  • Packing a job application. Combining résumé, cover letter, and reference letters into the one PDF an employer requested.

Frequently Asked Questions

How many PDFs can I merge at once?

There is no hard limit — the tool processes everything in your browser's memory. In practice, merging 20–30 typical office documents works smoothly. Very large files (hundreds of megabytes total) may be slow on lower-end devices.

Does the order of the PDFs matter?

Yes. Pages appear in the order you arrange the files. Use the up/down arrows to reorder before clicking Merge. The first file in the list becomes the first section of the merged document.

Will the merged PDF look exactly like the originals?

Yes for content. Bookmarks, annotations, and form fields from the originals are preserved in the copy operation. Embedded fonts and images are carried over unchanged.

Are my files uploaded to a server?

No. All merging happens in your browser using the pdf-lib JavaScript library. Nothing is sent anywhere.

Can I merge password-protected PDFs?

The tool attempts to open PDFs with empty passwords (owner-locked but not user-locked). PDFs that require a password to open cannot be merged — you will need to unlock them first in a dedicated PDF reader.

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