Apply a pixelation effect to any region of your image with Image Machine's mosaic tool — the standard method to censor faces, obscure license plates, hide usernames, or redact sensitive details before sharing a screenshot or photo. Every operation runs locally in your browser, so private or confidential images never leave your device during editing.
How It Works
Choose a tool
Pick from 120+ tools to resize, convert, compress, or enhance your image.
Upload & edit
Drag and drop your image and adjust the settings. It stays on your device.
Download
Save your result instantly — no watermark, no sign-up required.
Why Image Machine?
Your files never leave your device
All processing runs locally in your browser. Your images are never uploaded to a server.
Completely free
Every tool is free, with no limits, no watermarks, and no hidden costs.
Lightning fast
No upload waiting — your images are processed instantly on your own device.
Professional quality
Pixel-perfect output with full control over format, size, and quality.
Frequently Asked Questions
How do I pixelate a face in a photo?
Upload the image, draw a selection over the face, choose a block size for the mosaic grid, and apply the effect. The selected area becomes a solid block pattern while the rest of the photo stays unchanged. Download the result directly — no account, no watermark, and no server upload involved.
How do I censor a license plate in an image?
Open the photo in Image Machine's mosaic tool, draw a box around the license plate, and apply the pixelation effect. A coarser block size makes for a more thorough censor. The processed image downloads with the plate fully obscured and ready to share publicly without revealing any registration number.
What is the difference between blur and mosaic pixelation for censoring?
Blur applies a smooth gradient that softens details but may still allow some recognition under image enhancement. Mosaic pixelation replaces the selected area with a solid-color grid, which is generally considered harder to reverse. For stronger anonymization or regulatory compliance purposes, pixelation is the more commonly accepted method.
How do I redact a name or username in a screenshot?
Upload the screenshot to Image Machine's mosaic tool, select the text region you want hidden, and apply the pixelation effect. Adjust the block size — larger blocks create a bolder censor. The redacted screenshot downloads immediately and your original file is never sent anywhere outside your browser.
Can I selectively pixelate part of an image online for free?
Yes — Image Machine's mosaic tool is completely free, requires no sign-up, and adds no watermark. You mark the exact region to pixelate and choose your block size. Because it runs in-browser without uploading anything, you can safely use it on screenshots containing passwords, private conversations, or sensitive personal data.