# Blur Image Online - Pixelate or Redact Parts of a Picture

> Free online image redaction tool: drag to mark any area and hide it with pixelation, blur or a black box — several areas at once, for faces and plates.

- URL: https://qilingtools.com/en/image/mosaic
- Category: Image Tools (https://qilingtools.com/en/image)
- Tags: [Image](https://qilingtools.com/en/tags/image), [Privacy & Security](https://qilingtools.com/en/tags/privacy)
- Last updated: 2026-10-26
- Price: Free, no sign-up
- Privacy: Runs locally in the browser; files are never uploaded

Drag on the picture to mark what should be hidden, then choose pixelate, blur or a black box. You can mark as many areas as you like, adjust the strength and see the result instantly. It is the quick way to hide phone numbers, addresses, faces or number plates before sharing a screenshot or a photo. Because processing happens on your device, sensitive images never leave your computer — safer than any upload-based service.

## How to use

1. Upload an image
2. Pick pixelate, blur or black box, then drag over each area to hide
3. Click Redact & download

## Features

- Pixelate, Gaussian blur or solid black box
- Mark multiple areas, with undo
- Adjustable strength with live preview
- Sensitive images stay on your device

## FAQ

### Can pixelation be reversed?

Stronger settings are harder to read. For truly sensitive text such as ID numbers, use Black box — the pixels are overwritten and cannot be recovered.

### Does it work on a phone?

Yes. Drag with your finger in a mobile browser to mark an area.

### Are my files or data uploaded?

No. Everything runs locally in your browser with no network upload, and is discarded when you close the page.

### Do I need to sign up or pay?

No. The site is completely free, needs no account and has no usage limits.

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