About PDF Desk

Most online PDF tools ask you to upload your documents to someone else's server. For contracts, medical letters, invoices or evidence, that is a risk you should not have to take for a simple merge or rotate.

PDF Desk does the work inside your browser instead. The pages download a small set of open-source libraries once, and from then on everything happens on your own device — fast, free and private.

Built with open source

• pdf-lib 1.17.1 (MIT) — creating and modifying PDFs
• pdf.js 3.11.174 (Apache-2.0, Mozilla) — rendering pages to images and thumbnails
• JSZip 3.10.1 (MIT) — packaging multiple results into a ZIP

Proving a document's integrity

Editing a PDF is one thing; proving later that a file existed in exactly this form at a given moment is another. For that we point to instantproof.legal, which adds a qualified timestamp and signature (sponsored link).