Censr - Redact & scrub PDF data. No Upload. No Archive. No Account.
by•
Drop a PDF. Drag black bars across the lines you need gone. Censr permanently removes the underlying text, strips every byte of EXIF and metadata and never leaves your browser. No account required. No archives. We never see your file and we don't want to.
Redacted regions are destroyed at the byte level on export. Not painted over. Author, software, GPS & embedded thumbnails are all stripped. Your goes nowhere and comes back nameless.
Replies
How does this actually verify the text is gone and not still recoverable from the PDF structure, since metadata stripping and visible black bars work very differently at the byte level?
@utku1074360 The way Censr approaches ensuring that all redacted and meta-data is gone is by rasterizing the document and then forgetting the original entirely. The redactions you make by blacking out lines or images become literally part of that raster. When you are complete, Censr re-encodes that raster as a Jpeg and builds a new PDF with it. So, this is a fresh document, containing no meta-data or revision history from the original.
The caveat to this method is that the redacted document is essentially a "Scanned" document, in that there are no built in fonts, text streams, etc...
how does it actually handle scanned image PDFs where the text is baked into pixels rather than selectable?
@hsan768058 When you upload a PDF, Censr rasterizes the document, creating an image that it then turns back into a PDF with your redactions when you are finished. So the pipeline would function the same whether your document was image based or contained font or text streams.