Merge PDF Files Online
Combine multiple PDF files into one, in your browser
Processed entirely in your browser using a Web Worker. Nothing is uploaded.
How to use
- Select or drop the PDF files you want to combine.
- Drag files in the list to set the order they'll appear in.
- Click Merge PDF Files.
- Download the combined PDF.
Accepted formats
PDF files only. There's no fixed limit on how many you can add — the practical ceiling is your browser's available memory.
Features
- Files merge in exactly the order you arrange them
- Works with PDFs of different page sizes — each page keeps its own dimensions
- No file size or page count is enforced by the tool itself
What happens to your file
Page content is copied exactly, but document-level metadata, bookmarks/outlines and fillable form fields from the source files are not carried over to the merged PDF.
Known limitations
- Password-protected or encrypted PDFs are not supported — remove the password first.
- Bookmarks, outlines and form fields are not preserved in the output.
- Very large or numerous files are limited by your browser's available RAM, not by the tool.
Common use cases
- Combining scanned pages into one document
- Assembling a report from separate PDF sections
- Merging multiple invoices or receipts into one file
Questions.
Is my file uploaded anywhere?
No. Merge PDF runs entirely in your browser using a Web Worker — the file never leaves your device.
What file types does this accept?
Merge PDF accepts PDF files.
Can I merge password-protected PDFs?
No — encrypted PDFs need their password removed first, in another tool, before they can be merged here.
Does the order I upload files in matter?
No — you can drag files into any order in the list before merging; that order is what's used.
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