PDF Tools
Merge, split, compress, rotate, convert — all in your browser.
Your files never leave your browser.
Everything runs locally. Zero uploads. Zero servers. 100% private.
Merge PDFs
Combine multiple PDF files into one. Drag files to reorder before merging.
Drop PDF files here to merge
Select 2 or more PDFs
Frequently Asked Questions
Common questions about PDF Tools
Drop multiple PDF files into the merge tool, arrange them in the order you want, and click merge. The combined PDF downloads instantly. Your files are processed entirely in your browser — nothing is uploaded to any server.
Yes. The compression tool reduces PDF file size by optimizing internal structures. For most documents, you will see significant size reduction with no visible quality loss. Heavily image-based PDFs see the largest savings.
With DevToolBox, yes. Unlike most online PDF tools, everything runs in your browser using pdf-lib (a JavaScript library). Your files never leave your device. No server processing, no cloud storage, no data retention.
The tool supports merging multiple PDFs, splitting by page range, compressing file size, rotating pages (90/180/270 degrees), adding text watermarks, and converting images (JPG, PNG) to PDF. All operations run client-side.