About this tool
PDF Merge & Split is a free online tool that combines multiple PDF files into one, splits a PDF by page ranges, deletes pages, and rotates them. Everything runs locally in your browser using the pdf-lib library — your files never leave your device.
How it works
1
Drop your PDF files
Drag and drop PDF files into the upload zone, or click to browse. Multiple files supported.
2
Choose mode
Merge — combine all files into one. Split — extract specific page ranges. Rotate — turn pages. Delete — remove pages.
3
Download the result
Click Download — the result is generated in your browser and saved to your disk. Nothing is uploaded.
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Frequently Asked Questions
Are my PDF files uploaded to a server? v
No. Everything runs locally in your browser using the pdf-lib library. Your files never leave your device.
What is the maximum file size? v
The practical limit is your browser's available memory — usually several hundred megabytes per file. No hard limit is enforced.
How do I split a PDF by page ranges? v
Enter ranges like 1-3, 5, 7-9. Each range becomes a separate PDF file. If you enter multiple ranges, you can download them as a ZIP.
Can I merge PDFs with password protection? v
Not in this version. Encrypted PDFs must be unlocked first.
Does it work offline? v
Yes, after the first page load — everything is cached locally.