All tools / Merge PDF
Organize · Browser-local

Merge PDF

Combine multiple PDF files into one document in your chosen order.

Your document starts here.

Drop PDF files here, or choose from your device.

100 MB per file · 250 MB per workspace · No uploads

Use the arrows above to set the order of your files.

Choose files to get started.

Bring your PDFs together.

Combine multiple PDF files into one document in your chosen order. PDFapp runs this tool entirely in your browser, so you can work without creating an account or uploading documents.

How to use Merge PDF

  1. Choose your PDF files from your device.
  2. Review the file order or adjust the available settings.
  3. Run the tool and download your result. Clear the workspace when you are finished.
Is this tool free?

Yes. All tools in this MVP are free, with no registration or paid tier.

Where are my files processed?

On your device, inside the browser. Documents are never sent to our server. The host may log ordinary requests for website assets.

Which files are supported?

Unencrypted PDFs and, for image conversion, JPG and PNG files. Large or complex documents may exceed your device's memory. Password-protected PDFs, OCR, signatures and PDF forms are outside this MVP's guarantees. Editing can invalidate digital signatures.

A practical example

Example: a proposal with an appendix

Combine a 2-page proposal and a 3-page appendix into one 5-page PDF. The proposal comes first, followed by the appendix.

Numbers show page counts or selected page numbers.

  1. Add proposal.pdf and appendix.pdf using the file picker or drag and drop.
  2. Use the file arrows to place proposal.pdf first. File order determines the order of pages in the result.
  3. Choose Merge PDF, then download the new document. Check the first and last pages before sharing.

Expected result: one PDF with 5 pages, preserving the original page sizes. The source files remain unchanged.

Try the sample filesproposal.pdf ↓appendix.pdf ↓
Example: a proposal with an appendix
Preview of the actual sample output. Sample documents use English text; processing happens locally.
View the example in the tool
Example: a proposal with an appendix
Actual sample run in the English interface.

Questions about this tool

Can I merge PDFs with different page sizes?

Yes. This tool copies the source pages without resizing them. A document can contain both portrait and landscape pages, or a mixture of page sizes.

How do I change the order of files or pages?

Use the up and down arrows in the file list before merging. To rearrange individual pages afterward, open the result in Reorder PDF.

Will bookmarks, forms and digital signatures be preserved?

This tool copies page content, not every document-level feature. Bookmarks, attachments and interactive forms may not survive; editing can invalidate signatures. Keep the originals and check the result.

Keep working

Split PDFRotate PDFReorder PDFDelete PDF pagesJPG / PNG to PDFPDF to JPGWatermark PDFPage numbers