Free Image Pixelate Tool - Blur & Mosaic Photos Online
13 usesClick or drag an image here
Supports JPG, PNG, WebP, GIF formats
15px
40px
Hold and paint over areas you want to pixelate
Pixelation Tips
Privacy Protection
Always pixelate faces, license plates, ID numbers, and personal details before sharing screenshots or photos publicly.
Mosaic Size
Larger mosaic blocks provide stronger censoring. Use 20-35px for faces, 15-25px for text, and 30-50px for large areas.
Brush Size
Increase brush size for faster coverage of large areas. Use a smaller brush for precise pixelation around edges.
Undo Support
Made a mistake? Click Undo to reverse your last stroke. Up to 20 undo steps are available.
Paint to Pixelate
Simply hold your mouse button and paint over the area you want to censor. The mosaic is applied in real-time.
Touch Support
Works on phones and tablets too. Use your finger to paint mosaic areas on touchscreen devices.
Frequently Asked Questions
Can pixelated areas be restored?
Once you download the image, the pixelation is permanent and cannot be reversed. During editing, you can use the Undo button to restore previous steps.
What mosaic size should I use?
For text: 15-25px. For faces: 20-35px. For large areas: 30-50px. Start with the default 15px and adjust based on how well the content is obscured.
How many undo steps are supported?
Up to 20 undo operations. Each mouse release counts as one operation — continuous painting in a single stroke is one step.
Are my images uploaded to a server?
No. All processing happens entirely in your browser. Your images never leave your device, ensuring complete privacy.
Does it work on mobile?
Yes. Open this page in any mobile browser, upload your image, and use your finger to paint mosaic areas just like on desktop.
What's the difference between mosaic size and brush size when pixelating an image?
Mosaic size determines the *granularity* of the pixelation – how large each individual 'block' of color is. A larger mosaic size creates a more abstract, blurrier effect. Brush size, on the other hand, controls the *area* you apply the mosaic blur with each stroke. Use a smaller brush for precise details like eyes or text, and a larger brush for quickly covering big areas like entire faces or backgrounds. Both are crucial for effective and controlled image pixelation.
What's the easiest way to anonymize faces in photos online without Photoshop?
Our free, browser-based image pixelate tool offers a simple solution. Just drag your photo onto the page, select the brush tool, and paint over faces or other sensitive information. Adjust the mosaic size for desired anonymity and brush size for precision. Since no images are uploaded, it’s a quick and private way to anonymize photos without needing complex software like Photoshop.
What's the best way to obscure confidential text in a screenshot using an online tool?
Our free online image pixelate tool is ideal for this. Simply drag your screenshot onto the page. Use the adjustable brush size to precisely cover sensitive text areas. For optimal obscuring of text, a mosaic size between 15-25px is often effective. Since all processing happens in your browser, your confidential information remains private, never leaving your device. It's a quick and secure method to protect sensitive data in images.
What image file types can I pixelate using this online tool?
Our free online image pixelate tool supports all common image formats your browser can display, including JPEG, PNG, WEBP, and even animated GIFs (though only the first frame will be pixelated). You can easily drag and drop these files directly onto the page to start pixelating sensitive areas. Since all processing happens in your browser, compatibility is broad and convenient.
Is there a maximum image file size or resolution I can pixelate using this online tool?
Our tool processes images directly in your browser, so the primary limitation is your device's available memory. While there isn't a hard-coded maximum, very large images (e.g., extremely high-resolution photos over 20-30 megapixels or files exceeding 50-100MB) might slow down or cause issues on older devices. For most common photos, you'll experience smooth performance.
How to Pixelate an Image
- Upload an image by clicking the upload area or drag and drop.
- Adjust mosaic size (block size) and brush size using the sliders.
- Hold your mouse button and paint over the areas you want to censor.
- Use the Undo button if you make a mistake (up to 20 steps).
- Click Download to save the pixelated image as PNG.
Related Tools
Images are processed locally in your browser, never uploaded to any server.