How to use
Drop PDFs or click “Choose files” (multiple files; you can add more later).
Drag the handle on the left or use the ↑↓ buttons to set the order. “Sort by name” orders them all at once.
To use only some pages of a file, type them in “Pages to use”, e.g. 1-3, 5 (blank = all pages).
Enter a file name and click “Merge PDFs”.
Download the result or open it in a new tab to check it.
What it does
Safe — no upload
Merging runs inside your browser (in a Web Worker). Contracts and confidential documents never leave your device.
Page selection per file
Use ranges like “1-3, 5, 8-”, “odd”, “even” or “last” to take exactly the pages you need, in any order. Reversed ranges (5-1) and repeats work too.
Intuitive ordering
Reorder by drag and drop, by keyboard (focus the handle and press ↑↓) or with the move buttons. First-page thumbnails prevent mix-ups.
Original quality
Pages are copied as-is — no re-rendering or recompression — so text and images keep their quality and text stays searchable.
Handles large files
Up to 300 MB per file and 100 files. The page stays responsive and you can stop at any time.
Use cases
- Send several invoices or quotes as one attachment
- Put the front and back scans of a document into one file
- Combine a report with its appendices for submission
- Collect only the pages you need from several PDFs into one
Supported formats
Input
Output
Capability matrix
| Feature | Support | Notes |
|---|---|---|
| Merge multiple PDFs (up to 100 files) | Supported | — |
| Reorder by drag or keyboard | Supported | — |
| Page ranges per file | Supported | 1-3, 5 / odd / even / last / reversed |
| Original text and image quality | Supported | — |
| Keep bookmarks (outlines) | Partial | Bookmarks to pages kept in the output are carried over with their hierarchy. Bookmarks to unused pages and external links are left out |
| Links between pages (table-of-contents links, cross-references) | Supported | Re-pointed within each source file; links to pages left out by the page selection are removed |
| Keep form fields and digital signatures | Partial | Filled-in values stay as part of the page (shown in every viewer); editable fields and signature validity are not kept |
| Merge password-protected PDFs | Not supported | Remove the protection first |
Limits & notes
- Up to 300 MB per file and 100 files per merge. Very large totals may fail if your device runs out of memory.
- Password-protected PDFs cannot be opened.
- Form fields and digital signatures are not carried over (bookmarks are, only those that lead to pages kept in the output). Filled-in values stay as part of the page (no longer editable).
- Links between pages (explicit and named destinations) are re-pointed at the merged copy of the page in the same source file. Links whose target cannot be found, and links to pages left out by the page selection, are removed, so nothing from those pages ends up in the merged PDF. Links to URLs, notes and highlights are kept. Links never cross from one file into another.
- For rotating or deleting individual pages, use “Organize PDF pages”.
Privacy & safety
Loading, previewing and merging PDFs all happen in your browser. Files are never sent to LIBRA Works or any third party, and are cleared from memory when you close the page.
FAQ
Does merging reduce quality?
Can I merge only some pages?
Are my files uploaded?
Why can’t I merge a password-protected PDF?
What happens to bookmarks?
Do links in the text and table-of-contents links still work?
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