Blur or pixelate sensitive areas

Why "real" redaction matters

Most blurring you see online is implemented as a CSS filter overlay — the original pixels are still in the image file, just visually obscured by the browser. Right-click → Save Image, and the unblurred original is right there. Tools that genuinely protect privacy must destructively edit pixel data in the saved file. This is one of those tools.

Pixelate vs Blur — which to use

• Pixelate — replaces each block of N×N pixels with a single average color. The pixel block becomes uniform — there is no recoverable detail. Use for: faces, license plates, addresses, anything sensitive.
• Blur (Gaussian) — softens pixels into each other. Visually smooth, but with strong AI tools, partial recovery is sometimes possible. Use for: aesthetic background blur, mood photography. Not for security-critical redaction.
• Solid black box — the most extreme. Replaces the region with #000. Use this for legal/medical document redaction where any visible information is unacceptable.

Recommended pixel block sizes

• Face (large) — 20–32px. Should be unrecognizable to friends.
• Face (small/distant) — 8–14px.
• License plate — 10–16px (must obscure all letters).
• Computer screen content — 16–24px.
• Address / nameplate — 14–20px.

How to use

1. Drop an image. The full image appears on the canvas.
2. Click and drag to draw a box over the area to redact. Release the mouse to apply.
3. Repeat for multiple areas. Use Undo to remove the last region.
4. Adjust strength if the redaction is too weak (you can still see features) or too strong (the image is unrecognizable).
5. Click Download — you get a new PNG with the redaction baked into the pixel data.