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Image Redaction
Black out or blur parts of a screenshot.
Free tools that run in your browser. Nothing you type, open or create is uploaded to NerdBible or anyone else.
Use a solid box for passwords, account numbers and anything sensitive. Blurred or pixelated text can sometimes be read back by software that guesses the original letters, especially for short numbers in a known font.
Drag across the image to cover an area. Each box is burned into the pixels straight away, so it cannot be lifted off the saved file.
Everything happens on a canvas in your browser. When you save, the image is encoded again from the redacted pixels, so the file has no hidden layers and none of the original metadata: no location, camera details or editing history. Check the saved file before you share it.
How to use it
- Choose, drop or paste a screenshot or photo.
- Pick a solid box, pixelate or blur, then drag over each part you want hidden. Undo removes the last one.
- Download the redacted image as PNG or JPG and look at it once more before you share it.
Questions
Can someone undo the redaction?
Not for solid boxes: the covered pixels are replaced in the saved file, and there is no layer underneath. Pixelation and blur also destroy detail, but text that is short and predictable, such as a card number, can sometimes be guessed back from what is left. Use solid boxes for anything sensitive.
Why not just draw a box in a document editor?
Shapes drawn over a PDF or a Word file are separate objects that can be moved or deleted, and the text underneath can often be copied. Here the image itself is changed.
Does it remove location and camera data too?
Yes. Saving creates a new image from the pixels, and the original metadata, including GPS position and phone model, is not copied.
Is my screenshot uploaded?
No. It is opened, edited and saved in your browser, which is the point of a redaction tool.
About this tool
About image redaction
Screenshots often carry more than you meant to share: an email address, an order number, a bank balance, a face in the background. This tool hides those parts properly before the picture goes anywhere.
Three ways to hide something
- Solid box: covers the area completely. The pixels underneath are replaced in the saved file, so nothing can be recovered. Use this for anything sensitive.
- Pixelate and blur: look softer and suit faces or background clutter. They destroy detail, but short predictable text such as a card number can sometimes be guessed back from a blur, so prefer a box for numbers.
Why not just draw a box in a document?
Shapes drawn over a PDF or a Word file are separate objects that can be moved or deleted, and the text underneath can often still be copied. Here the image itself is changed and saved as a new flat file, with no hidden layers.
Before you share
Saving also drops the original metadata, including GPS position, camera details and editing history. Open the saved file and look at it once more before sending it, since a missed corner is the most common slip.
The image is opened, edited and saved in your browser and never uploaded.
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