Censor Image and Pixelator Tool
Censor Image and Pixelate whole images or draw rectangles over faces, license plates, and IDs. Free, offline, client-side - honest region selection, no AI guesswork.
Pixelate an entire image — or just the parts you need to hide. Upload a photo, choose Regions mode, and draw rectangles over faces, license plates, IDs, or any sensitive detail. Everything happens in your browser; the image never leaves your device.
How to Use Censor Image and Pixelator Tool
- Upload an image. Drop a JPG, PNG, WebP, or GIF onto the box, or click to pick one. The canvas shows the image at its native resolution so rectangles land on the exact pixels you meant.
- Choose a mode. Regions (default) lets you draw rectangles - one click-drag per region. Whole image pixelates everything; the block size slider drives a live preview.
- Draw rectangles in Regions mode. Click on a face, drag across, release. A red rectangle appears. Add as many as you need - one per face, plate, ID, or sensitive element.
- Tune the block size. 5-10 px gives subtle pixelation; 20-40 px heavy mosaic; 60-80 px for "unrecoverable" censorship. Larger blocks destroy more detail.
- Click Apply Censor or press Ctrl/Cmd+Enter. The tool pixelates every rectangle (or the whole image) and replaces the preview with the rendered output. Stats update with render time and output size.
- Undo mistakes. "Undo last region" removes only the last rectangle. "Clear regions" wipes them all without touching the image.
- Copy or download. Copy attempts to place the PNG on your clipboard (Chrome/Edge/Safari over HTTPS). Download saves a timestamped file with mode and format in the name.
Frequently Asked Questions
What is image pixelation used for?
Hiding sensitive details – faces, license plates, ID numbers, credit cards, confidential document fields – while leaving the rest of the image intact. The mosaic effect makes the covered region visually unreadable.
Does this tool detect faces automatically?
No – and it does not pretend to. Browser-side face detection is unreliable and often misses cases. The tool gives you an honest manual region selector: you click and drag, and you control exactly which pixels get censored.
How does the block size affect censorship?
Each block averages the pixels underneath it into a single colour. Small blocks (5-10 px) soften details but keep shapes recognisable. Large blocks (60-80 px) destroy nearly all recoverable information within the region.
Can I censor only specific parts of the image?
Yes – that is what Regions mode is for. Draw a rectangle over each area you want hidden; only those rectangles are pixelated. Everything outside stays at the original resolution.
What image formats are supported?
Input: JPG, PNG, WebP, and GIF (first frame only for GIFs). Output: PNG (lossless, transparent-safe) or JPEG (smaller file size, with a quality slider).
Is pixelation reversible?
No. Each block overwrites the original pixels with a single averaged colour, so the detail under the rectangle is gone for good. Always keep a backup of your source image before censoring.
How accurate does pixelation need to be for privacy?
For faces, use a block size at least one-fifth of the face’s shortest side (e.g. 15 px block for a 75 px-wide face). For text like licence plates or ID numbers, 20-30 px blocks are usually enough to make the characters unreadable at normal viewing distances.
Is there a file size limit?
There is no hard cap, but images above roughly 4096×4096 pixels start to feel slow. The pixelation runs in pure JavaScript – very large raw images may take a second or two to render on low-end devices.
Does this tool work offline?
Yes. After the page has loaded, every operation happens in-browser. Disconnect from the network and the tool keeps working.
Is my data secure and is this tool free?
Yes on both counts. Zero uploads – the image never leaves your device – and no sign-up, subscription, or usage caps.