Redact an Image Online
Draw solid black bars over sensitive text or details — flattened into the file, free, and right in your browser.
Suelta una imagen para difuminar
Arrastra y suelta, pega o elige un archivo
PNG · JPG · WebP · GIF · BMP — procesado en tu dispositivo
Redaction removes detail for good
Redacting means covering sensitive information with a solid, opaque bar — the black rectangles you see on released documents. Unlike a blur or a mosaic, a redaction bar replaces the pixels underneath entirely, so there is nothing left to reconstruct. It's the right choice for account numbers, signatures, addresses, and anything confidential.
Drag a bar over each detail you want gone. The default colour is black, but you can pick any colour to match the document. When you download, the bars are flattened into a single image — there are no hidden layers, so the redacted content can't be peeled back from the saved file.
How to redact an image
- Open your image or screenshot. Drag it onto the tool, choose a file, or paste it.
- Bar each detail. With Redact selected, drag a solid bar over every piece of sensitive information.
- Download the flattened file. Click Download — the bars are baked into the image, with nothing recoverable beneath.
Why a bar beats a blur
Blurred and pixelated text has occasionally been reversed by determined attackers, because some original information survives. A solid redaction bar leaves nothing behind — for anything that truly must stay secret, redact rather than blur.
Cómo funciona redact image
- Qué hace
- Barras de redacción sólidas y opacas
- Cómo lo hace la herramienta
- La herramienta pinta un rectángulo sólido del color que elijas (negro por defecto) sobre el área, sobrescribiendo por completo los píxeles que hay debajo: las mismas barras opacas que ves en los documentos publicados.
- Para qué sirve
- La redacción es la opción correcta para lo verdaderamente confidencial —números de cuenta, firmas, direcciones completas, documentos de identidad—, todo lo que debe ser imposible de leer o reconstruir.
- ¿Se puede revertir?
- A diferencia de un desenfoque o un mosaico, una barra sólida reemplaza por completo los píxeles subyacentes y se aplana en el archivo al descargar, así que de verdad no queda nada por recuperar.
Consejo: Redacta la imagen original a tamaño completo en lugar de una copia reducida, y nunca coloques solo una caja negra en una capa de edición aparte: aplánala, algo que esta herramienta hace automáticamente al descargar.
More ways to blur & hide
Preguntas frecuentes
Is redaction safer than blurring?
Yes. A solid bar replaces the pixels completely, so there is no underlying detail to recover — unlike a blur or pixelation, which can sometimes be partly reversed.
Can the black bar be removed from the file?
No. When you download, the bar is flattened into the image. There are no separate layers, so the covered content is gone from the saved file.
Can I use a colour other than black?
Yes. The bar is black by default, but you can pick any colour with the bar-colour picker to match your document.
Where is my image processed?
The blurring happens in your browser, so the new file is created on your own device. How any data associated with the tool is handled is described in our privacy policy.
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