Drop in a PDF, drag a black box over anything sensitive (names, prices, addresses, plan details), and download a redacted copy. This is real redaction: every page is flattened to an image with the boxes burned in, so the covered text and graphics are removed from the file, not merely painted over. Everything happens in your browser, your file is never uploaded, so it is safe for confidential contracts and drawings. One trade-off to know: the redacted PDF becomes images, so it no longer has live, selectable text.
Drag across anything sensitive to draw a black box over it. Add as many boxes as you want, on any page. When you download, every page is flattened to an image with the boxes burned in, so the covered text and images are removed from the file, not just hidden.