Redact a PDF online for free. Draw black boxes over sensitive text, and KOIAE permanently removes what's underneath by flattening those pages — safe, private, in your browser.
Redact PDF lets you black out sensitive information online — fast, secure and simple. Upload your PDF and KOIAE gives you a redacted PDF in seconds, right in your browser. There is no installation and no watermark. Safely share documents without leaking names, numbers or private data.
Drag and drop your PDF onto the Redact PDF tool above, or click to browse and select from your device.
Drag boxes over anything sensitive — KOIAE permanently removes what's underneath.
Click the button and download a redacted PDF instantly. Your files are deleted automatically afterwards.
Redact PDF is part of the KOIAE Premium plan. Premium unlocks every tool, files up to 100 MB and unlimited conversions — and our essential tools such as Merge, Split and Compress PDF stay free for everyone.