Merge PDF files

Maximum combined file size: 100MB, up to 500 files
Supported types: PDF, DOC, DOCX, ODT, PPT, PPTX, EPUB
(other files will be converted to PDF automatically)

All files are automatically deleted 1 hour after upload.

Online PDF merge / combine tool

A free online tool for merging (combining) multiple PDF files into a single document. You can merge two or more files simultaneously, even if they have different sizes and page counts.

Rest assured, we do not impose any watermarks on the documents you create. All uploaded files are automatically removed one hour after the upload.

How to Merge PDF Files

  1. Upload all the files you need to merge. You can select multiple files at once by pressing and holding Ctrl (or Command on Mac) and clicking on them in the file browser, or by dragging them into the upload area.
  2. Drag and drop the uploaded files to arrange them in your preferred order.
  3. Click the merge button to start the process.
  4. After a brief moment, a download icon will appear on the right. Click on it to save your merged PDF, or select other actions from the drop-down menu.

Features

  • No watermarks: The merged document is clean and professional.
  • No file limits: Combine as many PDFs as you need (up to 100MB per file).
  • Different page sizes: Merge documents even if they have different page dimensions.
  • Drag and drop ordering: Easily rearrange files before merging.
  • Free to use: No registration or payment required.

Remember to save your output file — all files are automatically deleted from our servers within 1 hour of upload.

Looking for related tools? Use our PDF splitter to extract pages from a document, reorder pages within a merged file, or try N-up printing to put multiple pages per sheet.

Frequently Asked Questions

How do I merge PDF files online?
Upload your PDF files to PDFResizer.com, drag and drop them to arrange the order, then click the merge button. Your combined PDF will be ready to download in seconds.
Can I rearrange pages before merging PDFs?
Yes! After uploading, you can drag and drop the files to reorder them. The merged document will follow the order you set.
Is there a file size limit for merging PDFs?
You can upload files up to 100MB combined. There is no limit on the number of files, and all tools are completely free with no watermarks.
Are my files safe when merging PDFs online?
Yes. All uploaded files are automatically deleted from our servers within 1 hour. We do not store, share, or access your documents.