Permanently redact PDF content privately
Drag over sensitive information, then create a rasterized redacted PDF in which the original page content is not hidden underneath the redaction marks.
Private
Files stay on your device
Fast
Built for quick results
Browser-based
No software installation
Simple
Upload, process, download
Select one PDF
Choose or drag the PDF you want to redact.
PDF ยท Maximum file size: 25 MB
You can drag files here or use the browse button above.
How it works
How to redact a PDF
Choose one PDF
Select the document you need to redact.
Mark sensitive areas
Choose each page and drag black redaction areas or use the keyboard-friendly percentage controls.
Create the redacted copy
Kukureku rasterizes the pages, applies the redactions, and rebuilds a new PDF.
Helpful tips
Get the best result
Mark sensitive content precisely
Drag one or more redaction boxes, or enter percentage coordinates when using a keyboard or touch device.
Rasterized redaction export
The downloaded PDF is rebuilt from rendered page images after redaction, so original page text is not hidden underneath black boxes.
Review before sharing
Check every page and every marked area before distributing the redacted copy.
Frequently asked
Common questions
Is this only a black rectangle?+
No. Kukureku renders the document, paints the redactions into the page pixels, and rebuilds a new PDF from those redacted page images.
What changes in the output?+
The redacted output is rasterized. Selectable text, links, form fields, annotations, and other interactive page objects are not retained.
Is the PDF uploaded?+
No. Preview rendering and redaction are performed locally in your browser.
Keep working
Need another PDF tool?
Continue with another document task from the Kukureku PDF workspace.