Merge, Split & Rotate PDF — Free and In-Browser
Drop in as many PDFs as you like, put them in the order you want, and merge them into one file. Or go the other way: pull a page range out of a single PDF, and turn sideways scans the right way up before you combine them. Every byte is processed by your own browser — the files never leave your device.
Private by design. Merging, splitting and rotating all happen inside your browser — your PDFs are never uploaded to a server.
How to merge PDF files online for free
- Add your PDFs. Drop the files onto the box or click to browse. Each file is read locally and its page count appears straight away; password-protected files are flagged instead of failing silently.
- Put them in order. Use the up and down arrows to arrange the files. They are merged top to bottom, exactly as listed.
- Pick pages and rotation (optional). Leave Pages set to "all", or type a range like 1-3,7 to take only part of a file. Choose 90, 180 or 270 to rotate that file's pages before they go in.
- Merge or extract. Click Merge to download the combined PDF, or Extract pages on a single file to save just that range as a new PDF.
Use Cases
Frequently Asked Questions
Are my PDFs uploaded to a server?
No. The merging is done by pdf-lib running inside your browser tab. Open your browser's network panel while you work and you will see no file traffic at all — which also means confidential documents stay confidential.
How do I write a page range?
Page numbers are 1-based and comma-separated: 1-3,7 takes pages 1, 2, 3 and 7. Type "all" for the whole file. Out-of-range or malformed ranges are explained inline instead of failing on download.
Can I split one PDF into separate files?
Yes — set the range you want and click Extract pages. Repeat with a different range for each piece you need; each one downloads as its own PDF.
Why does my password-protected PDF get rejected?
Encrypted PDFs cannot be read without the password, and this tool deliberately does not try to bypass encryption. Open the file in your PDF reader, save an unprotected copy, then add that copy here. Your other files still merge normally.
Is there a file size or file count limit?
No hard limit — the ceiling is your device's memory. Files are read one at a time from disk rather than held in memory all at once, so tens of megabytes per file is routine.
Does rotating here replace the page's existing rotation?
It adds to it. A page already saved at 90° that you rotate another 90° here comes out at 180°, which matches how a viewer applies rotation.
Which action do you actually need?
Merge, split and rotate all live on this one page because they are usually steps in the same job. Here is the quickest route for each task.
| What you want | How to do it here | Result |
|---|---|---|
| Combine several PDFs | Add all files, order them with the arrows, click Merge | One PDF, files appended in list order |
| Take pages out of a PDF | Add the file, set Pages to e.g. 2-5, click Extract pages | A new PDF with just those pages |
| Split into two halves | Extract 1-N, then change the range to N+1-end and extract again | Two separate PDFs |
| Reorder pages inside one PDF | Set Pages to the order you want, e.g. 3,1,2 | Pages come out in the order you typed |
| Fix sideways pages | Pick 90, 180 or 270 for that file, then Merge or Extract | Rotation baked into the output |
| Merge only part of each file | Give each file its own range, then Merge | One PDF containing just the selected pages |
- Merging copies pages as-is: fonts, images and vector content are carried over untouched, so quality is identical to the source. It does not re-compress — if the output is large, run it through the PDF Compressor afterwards.
- Interactive form fields and annotations may not survive a merge intact, because the copied page keeps its content but not always the document-level form structure. Flatten forms first if the values matter.