Merge PDF Converter
Combine multiple PDF files into a single PDF directly in your browser. Reorder files before merging — free, no sign-up, nothing uploaded to a server.
Drop your files here
or choose files
Supports PDF
Your files are processed locally in your browser and are not uploaded to our servers.
How to use the Merge PDF converter
- 1
Drop two or more PDF files onto the upload area, or click it to choose them.
- 2
Reorder the files with the up/down buttons — the merged PDF follows this order.
- 3
Click "Merge PDFs."
- 4
Download the combined PDF.
Common uses
- Combining separate scanned pages or chapters into one document
- Assembling a single report from PDFs produced by different tools
- Merging an invoice and its supporting attachments into one file to send
- Putting several contracts or forms together for one submission
Supported formats and limitations
Accepts PDF, up to 20 files at a time.
- Up to 20 PDF files per merge, 40 MB each.
- Each source PDF's own page sizes and orientations are preserved as-is — pages aren't resized to match each other.
- Password-protected PDFs can't be read and are rejected with a clear message rather than a broken merge.
Frequently asked questions
No. Merging happens entirely in your browser using pdf-lib — your files are never sent to a server.
Yes — use the up/down buttons on each file in the list before merging; pages are combined in that order.
Each source PDF's pages are copied as-is, but document-level bookmarks and interactive form fields are not carried over into the merged file.
No — a password-protected PDF can't be read in the browser, so it's rejected with a clear error instead of producing a broken result.
Yes — up to 20 files, 40 MB each.