Is this 'true' redaction, or just a black box on top?

True redaction. Export rasterizes each redacted page into a flat image, so there's no hidden text layer left to copy or search out.

Will the rest of the PDF's pages be affected?

No — only pages you draw a redaction on are flattened; untouched pages keep their original text and quality.

Can I undo a redaction before exporting?

Yes, redactions are editable up until you click Flatten & Export; after export, the change is permanent by design.

No. 09

Redact

Black out sensitive text or images in a PDF, then flatten the page to an image so the hidden content is actually gone.

Drop the PDF you need to redact

Uploaded 0 bytes Loads a small PDF engine on first use, then works offline. (network monitor unsupported in this browser)

How your data is handled: everything above runs inside this browser tab; your file is never uploaded. Loads a small PDF engine on first use, then works offline.

A black rectangle drawn over text in most PDF tools is cosmetic — the original text is still there, selectable and copyable underneath. This tool actually removes it: after you mark what to hide, the page is rasterized to an image, and a “verified removed” stamp confirms it.

How to use it

Drop a PDF and open the page you need to redact.
Draw black bars over the text or images to hide with the marker tool.
Repeat across any other pages that need it.
Click Flatten & Export — this rasterizes every redacted page so nothing can be selected or extracted underneath.

Tips & edge cases

A black rectangle drawn in a normal PDF editor often just sits on top of the text layer — the text is still selectable underneath. This tool's export step rasterizes the page, so that failure mode isn't possible here.
Flattening converts the whole page to an image, which means text elsewhere on that page stops being selectable or searchable too — expected for true redaction, but worth knowing before you export.
Redact images (photos, signatures, ID scans) the same way as text — draw over them; the marker doesn't care what's underneath.

FAQ

Is this 'true' redaction, or just a black box on top?: True redaction. Export rasterizes each redacted page into a flat image, so there's no hidden text layer left to copy or search out.
Will the rest of the PDF's pages be affected?: No — only pages you draw a redaction on are flattened; untouched pages keep their original text and quality.
Can I undo a redaction before exporting?: Yes, redactions are editable up until you click Flatten & Export; after export, the change is permanent by design.