Ordinary online PDF sites work by uploading your document to their servers, processing it there, and letting you download the result — your contract, medical record or payslip makes a round trip through someone else's computer. This site is different by construction: the processing code is delivered to your browser and runs there. Your files are opened by your own machine, transformed by your own machine, and saved by your own machine. There is nothing on our side to upload to.
The PDF Toolbox desktop app compresses, redacts with verified removal, OCRs scans, repairs damaged files, converts to PDF/A and handles 500-page documents — all offline, on your machine, with the same promise: nothing ever leaves it.