Redact Text in ScreenshotBlur, Blackout, or Pixelate Image Text Directly in Browser Memory
Safely redact API keys, passwords, client names, and confidential chat logs before sharing on Discord, Slack, GitHub, or Reddit. Zero image data is ever uploaded to our servers.
To redact text in a screenshot securely, avoid translucent pen tools and light blurring. Traditional image editors often leave residual luminance values that optical character recognition (OCR) and machine learning de-blurring tools (such as Depix) can reverse. The safest redaction method is Solid Blackout, which destroys the underlying pixel data by overwriting the bounding box with opaque RGB values (#000000). Bluro renders these transformations inside client browser RAM via HTML5 Canvas, ensuring that sensitive documents, tokens, and screenshots never touch a remote server.
How to Redact Text in Screenshots in 4 Steps
Fast, zero-latency redaction engineered for software developers, IT support, and legal professionals.
Upload or Paste
Press Ctrl+V / Cmd+V anywhere on the page to paste directly from your clipboard, or drag and drop a PNG, JPG, or WebP screenshot.
Select Tool Mode
Pick Solid Blackout for high-security credentials, or toggle Gaussian Blur / Pixelate for photos, avatars, and general contextual information.
Draw Redaction Boxes
Click and drag over sensitive areas. You can create multiple boxes, adjust blur radius and pixel size, or undo mistakes with one click.
Copy or Download
Click Copy Image to place the sanitized PNG directly onto your system clipboard, or download the full-resolution file to disk.
Why Traditional Blurring Exposes Your Passwords
Visual concealment is not data destruction. Understand the digital forensic flaws in popular screenshot tools.
Translucent Pen Brushes
The standard black pen in iOS and macOS Markup is a highlighter brush with partial alpha transparency. Even when scribbled over text 5 times, color contrast tools can increase brightness and reveal the raw text underneath.
Depix & OCR Character Matching
Because operating systems render fonts with deterministic glyph shapes, tools like Depix evaluate the color gradients of pixelated blocks against known character matrices, successfully recovering passwords and card numbers.
Opaque Solid Blackout
Bluro Solid Blackout mode overwrites canvas pixels with pure opaque black (#000000). When the pixel array has zero entropy, there is zero residual signal for AI or forensic software to reconstruct.
Screenshot Redaction FAQ
Can blurred text in screenshots be unblurred?
Yes. If text was blurred with a low radius or pixelated, machine learning tools can compare the color gradients with known font styles to decipher the characters. To guarantee unrecoverable redaction, always choose Solid Blackout.
Are my screenshots uploaded to your servers?
No. All image loading, pixel manipulation, and file downloads are executed locally in your browser memory via the HTML5 Canvas API. We never see, store, or transmit your images.
How do I blur text in Discord before sending a screenshot?
If you want to hide an entire image attachment on Discord, rename your file with a SPOILER_ prefix (e.g. SPOILER_screen.png) or click the eye icon in Discord. But to redact specific words or passwords while keeping the rest visible, use Bluro to blackout those sections first.
Can I redact images on mobile devices?
Yes. Bluro supports touch events. Tap the upload area to select a screenshot from your photo library, drag your finger across the target text box, and save the redacted image directly back to your device.
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