PDF Merge
Combine multiple PDFs into one file in any order
Drag & drop files here
or browse files
Select multiple PDFs at once; you can keep adding more
About this tool
Combining separate PDFs into one is how you assemble scanned contracts, stitch thesis chapters or bundle a set of invoices. This tool uses pdf-lib to rewrite PDF objects directly in the browser instead of re-rendering pages, so the original text layer, vector artwork and links stay selectable and searchable.
After adding files you can reorder them with the up and down arrows, remove any entry, or keep adding more. The file count and total page count update live, so you can confirm everything before merging. The finished file downloads automatically.
Features
- Select several PDFs at once, and keep adding more afterwards
- Reorder freely with up and down arrows, remove any file at any time
- Live file count and total page count before you commit
- Text layer and vector content are preserved - output stays searchable
How to use
- Drop or select the PDF files you want to combine
- Use the up and down buttons to set the order, and the cross button to remove a file
- Check the file count and total pages shown at the bottom
- Click Merge PDF - the result downloads automatically
Frequently asked questions
- Do I need an account to merge PDFs here?
- No. There is no membership, no usage limit and no watermark on the output. Everything runs locally in your browser - the site has no backend, so there is nothing to sign up for.
- What if the merged PDF has different page sizes?
- That is expected: every page keeps its original dimensions, so A4 and Letter pages can coexist in one file. Enable scale-to-page-size when printing. If you want uniform pages, extract the pages you need with the PDF Split tool first and reassemble them.
- Can I split a merged PDF again?
- Yes. Use the PDF Split tool to extract a page range or turn every page into its own file. Combining merge and split lets you reorganise documents freely.
- Will merging lose the text layer?
- No. pdf-lib copies page objects rather than rasterising them, so text, vector graphics and links are preserved and the merged file remains searchable and copyable.
- It says a file could not be parsed - what now?
- The file is usually damaged, password-protected, or named .pdf without actually being one. Open it in a PDF reader first to confirm, and remove any password before merging.
- Are files ordered by filename?
- They are ordered by the sequence you picked them in, which is not always alphabetical. Confirm the order with the arrow buttons after adding - the current order is always shown on screen.