Redact a Screenshot
Blur, pixelate, or black out anything sensitive before you share. Auto-detect can even find emails and phone numbers for you — all without the image leaving your browser.
- 100% free
- No upload — runs in your browser
- No signup
- No watermark
How to redact a screenshot
Permanently hide sensitive information in a screenshot before sharing it.
Load the screenshot
Drag it in, paste with ⌘V / Ctrl+V, or click to choose the file.
Choose a redaction style
Blackout is the safest. Strong pixelation is a good middle ground. Light blur is the prettiest but weakest — avoid it for passwords or keys.
Mark the sensitive areas
Drag boxes over emails, names, tokens, or faces. Or press “Auto-detect” to let on-device OCR suggest regions, then review them.
Export and verify
Download the PNG, then zoom in and confirm every secret is unreadable before you share it.
What this tool does
- Three redaction styles: blackout (safest), strong pixelate, blur
- Drag rectangles over anything sensitive — remove or re-do any region
- Experimental auto-detect finds emails, phone numbers, and long tokens via on-device OCR
- Exports at full resolution as PNG, or copy to clipboard
- Nothing is uploaded — redaction happens locally, as it should
Redact on Mac without opening a browser
Pizazoo’s native editor redacts in one click and its AI keeps every screenshot organized — 100% on-device, so sensitive captures never leave your Mac.
Frequently asked questions
Is blurring enough to hide a password or API key?
Often not — researchers have reconstructed text from light blurs. Use blackout or maximum-strength pixelation for anything truly secret. This tool defaults to safe settings for that reason.
Does auto-detect send my image to an AI service?
No. Auto-detect runs Tesseract OCR compiled to WebAssembly inside your browser. The OCR engine downloads once (a few MB); your image stays on your machine.
Is the redaction really permanent in the exported file?
Yes. The exported PNG contains only the final pixels — redacted regions are destructively overwritten. There is no hidden layer that could be peeled back.
Can auto-detect miss things?
Yes — treat it as a helper, not a guarantee. It looks for emails, phone-like numbers, and long token-like strings, but you should always review the image before sharing.
How do Mac users do this faster?
Pizazoo for macOS includes one-click redaction tools in its native editor and keeps your whole screenshot library private and offline.