What this tool does
Joins multiple PDF files into one, preserving the content and page order of each source file. Bookmarks, form fields, and embedded images are retained. The output is a single standard PDF.
PDF and document tool
Merge PDF
Merge 2 to 20 PDFs locally in your browser, without uploading documents. Up to 50 MB total and 300 pages.
Complete guide
How to use Merge PDF
PDF tools guide for merge pdf users.
Select PDF files in the desired order, then merge locally. Documents are not uploaded. Password-protected or damaged files must be fixed first.
Up to 20 files, 50 MB combined and 300 pages. Verify bookmarks, forms and page appearance afterward. Original digital signatures may no longer be valid.
Continue with OCR, table review, or server-backed PDF compression. Compression still requires the separate API.
How to use it
Upload two or more PDFs. Drag them into the order you want. Click Merge. Download the combined PDF. You can upload as many files as needed in one batch.
Best practices
Arrange files in the correct order before clicking Merge - you cannot reorder pages after merging without a separate tool. If any source file is password-protected, remove the password using PDF Unlock first.
Quick checklist
- Confirm the input file, value, text, or measurement is correct before running the tool.
- Use the visible dropdowns and settings to choose the output format, unit, quality, size, or result style.
- Check the preview, result text, or downloaded file before using it for important work.
- For private or sensitive data, prefer browser-based tools and avoid uploading files unless the tool clearly needs server processing.
Answers
Merge PDF FAQs
How many PDFs can I merge at once?
There is no fixed limit on the number of files. Use the tool free with no account required. Upload all files in one session for best results.
Will the page numbering from the original PDFs be preserved?
Page numbers that are part of the page content (typed into the document) are preserved. Page numbers added by PDF viewers (like Acrobat's status bar) are viewer-generated and do not appear in the merged file.
Can I merge password-protected PDFs?
No. Remove the password using PDF Unlock first, then merge.
What order will the pages appear in?
The order you arrange the files in the upload list. Drag to reorder before clicking Merge.
Can I merge PDFs with different page sizes?
Yes. The output PDF preserves each page at its original size. The pages do not get resized to match each other.
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