PDF Tools
Merge PDFs into one, split by page range, or rotate pages — entirely in your browser. No uploads. No accounts. Your documents never leave your device.
Drop PDF files here or click to browse
PDF only · Up to 20 files · Max 200 MB each
What are PDF tools?
PDF (Portable Document Format) is the universal standard for sharing documents that must look identical on every device and printer. Unlike Word documents or images, a PDF preserves exact fonts, layout, and formatting regardless of what software or operating system opens it. Three operations cover the vast majority of everyday PDF work: merging (combining multiple PDFs into one), splitting (extracting specific pages or page ranges), and rotating (correcting orientation for scanned documents).
Common scenarios: combining a CV, cover letter, and portfolio into one file for a job application; splitting a 50-page bank statement to extract just one month's pages; rotating a scanned document that came out sideways.
How do browser-based PDF tools work?
OffCloud.tools uses pdf-lib — a pure JavaScript PDF manipulation library compiled to WebAssembly. When you load a PDF, it is read into memory in your browser. The library parses the PDF byte structure, extracts page objects, and re-assembles them into new documents according to your instructions. Nothing is sent to a server at any point.
Page thumbnails are generated using PDF.js (Mozilla's PDF renderer), also running client-side. Both libraries are loaded once and cached — subsequent operations happen offline.
How to merge, split, or rotate PDFs with OffCloud.tools
To merge:
- Select the Merge tab.
- Drop two or more PDF files onto the drop zone.
- Drag the file cards to arrange them in the order you want.
- Click Merge PDFs. Download the combined file.
To split:
- Select the Split tab and drop a PDF.
- Choose a mode: page range (e.g. pages 1–5), every N pages, or extract a specific page.
- Click Split PDF. Multiple output files are zipped for download.
To rotate:
- Select the Rotate tab and drop a PDF.
- Choose 90°, 180°, or 270° rotation direction.
- Click Rotate PDF. Download the corrected file.
Is it safe to use PDF tools online?
Most online PDF tools — including major ones you'll find at the top of search results — upload your files to their servers for processing. Your tax returns, legal documents, and medical records pass through their infrastructure. Some retain files for 24 hours or more before deleting them. OffCloud.tools processes PDFs entirely in your browser using WebAssembly. No data is transmitted. The files you load are held in browser memory only and are discarded when you close the tab.