Document Redactor / Blur
Drop a screenshot, drag boxes over the sensitive bits — credit card digits, names, addresses, whatever — choose pixelate-blur or solid black, download. Runs entirely in your browser; the image never leaves your device.
Drop a screenshot or document image
PNG · JPEG · WEBP — drag boxes after dropping
How it works · privacy guarantee
Your image is loaded into a canvas. When you drag, the tool draws a temporary overlay rectangle; on release, that region is replaced with one of:
- Pixelate — the region is downsampled to a tiny canvas (size driven by Strength) then drawn back with
imageSmoothingEnabled = false, producing visible blocks. - Solid black — the region is filled with opaque black. Cannot be reversed even if someone gets the saved PNG.
- Gaussian blur — the region is redrawn through
canvas.filter = 'blur(Npx)'. Looks softer but technically a determined attacker could deblur small text. For real secrets use Pixelate or Solid black.
Nothing is uploaded. Boxes are baked into the canvas pixels themselves, so the downloaded PNG contains no recoverable "redaction layer" — it's just a normal image with the boxes burned in.