Black out names, numbers and any sensitive text — then download a copy where it's truly gone. Unlike a black box you can copy under, DockDocs flattens each page to an image so the hidden text is destroyed for good. Runs in your browser; your file never leaves your device.
or drop your file here
Drop your PDF onto the page and DockDocs renders every page right in your browser. Drag a box over anything you want to hide — a name, an account number, a signature. DockDocs also auto-scans for likely sensitive items (emails, phone numbers, SSNs, card numbers, IPs) and pre-marks them; review those suggestions and click the ✕ on any box you don't want. When you're done, hit Apply & download to get the redacted copy.
Actually removed. A lot of "redaction" just lays a black rectangle on top — the original text is still in the file and anyone can copy it out or delete the box. DockDocs re-renders each page as a flat image with the black areas burned in, so the underlying text is destroyed and gone for good. That's exactly what makes the result safe to share.
No. The whole thing runs inside your browser on your own device — opening the PDF, drawing the boxes, and building the redacted copy all happen locally. Your file is never sent to a server and never leaves your computer, so it's a good fit for confidential or regulated documents.
It's completely free with no account, email, or install required. There's no fixed file-size cap, though very large PDFs depend on your device's memory. The one hard limit is page count: a document can have up to 30 pages — if yours is longer, split it first and redact each part.
You get a new PDF where every page is a flattened image (around 158 DPI — clean and readable). Because the pages are now images, the redacted content is permanently gone and the rest of the text is no longer selectable or searchable. That trade-off is the whole point: text you can't select is text that can't be recovered.
Treat them as a head start, not a guarantee. The auto-scan catches common patterns like emails and numbers, but it can miss things written in unusual formats and won't know about context-specific secrets only you can recognize. Always read through the pages yourself and drag boxes over anything the detector didn't flag before you download.