Pixelate Image Online — Free & Private
Apply Pixelation to Any Photo Instantly. Adjustable Block Size. No Uploads — 100% In-Browser.
When to Pixelate an Image
Privacy & Censorship
- Pixelate faces in photos before posting online for GDPR compliance
- Censor license plates in street and venue photography
- Pixelate personal information in document screenshots
- Censor bystander faces in real estate and business photography
Design & Art
- Create retro pixel art effects from modern photographs
- Apply mosaic backgrounds for creative design compositions
- Generate pixelated thumbnails for gaming and streaming content
- Create 8-bit style effects for marketing graphics and memes
Content & Media
- Pixelate credentials and tokens in developer tutorial screenshots
- Censor spoiler images for preview thumbnails
- Apply broadcast-style censorship mosaic to images before publication
- Pixelate sensitive data in compliance documentation images
How to Pixelate an Image Online — 3 Steps
Upload Your Image
Drop any JPG, PNG, WebP, or GIF image into the tool, or click to browse. Nothing is uploaded to any server.
Set Pixelation Level
Adjust the pixel block size slider (2–64px). Larger blocks produce a coarser mosaic effect. The preview updates in real-time.
Download the Pixelated Image
Download your pixelated image instantly. No watermarks, no sign-up. Your image never leaves your browser.
Free Online Image Pixelation Tool — Mosaic Effect in Your Browser
Pixelation (also called mosaic or censor blur) converts image regions into large colored blocks — the same technique used by broadcast news to obscure faces and license plates. PicsSizer's pixelation tool applies this effect to your entire image using the HTML5 Canvas API, running 100% in your browser. Upload any JPG, PNG, or WebP file, set the pixel block size, and download the result instantly. Your images never leave your device.
Pixelation vs. Blur — Which to Use?
Both blur and pixelation obscure image content, but they work differently. Gaussian blur (soft blending of adjacent pixels) produces a smoother, more aesthetic result — good for background softening and subtle privacy. Pixelation (scale down then scale back up) produces the recognizable 'mosaic' or 'censor' effect familiar from TV news and social media — stronger visual signaling that content has been intentionally obscured. For faces, both are effective at comparable levels. For text and numbers (license plates, credentials), pixelation at 10+ block size is generally more effective than blur at hiding individual characters.
Choosing the Right Pixel Block Size
Block size 2–4px: very fine grain, barely noticeable — used for creative texture effects rather than privacy. Block size 8–16px: effective censorship mosaic for faces and text at standard web image sizes. Block size 24–48px: strong coarse pixelation — the classic broadcast TV censor effect. Block size 48–64px: extreme pixelation — used for pixel art effects or to completely obscure large areas. For reliable privacy, use block size 10px or larger for images at 800–1500px width. Smaller images need smaller block sizes to achieve equivalent obscuring effect.
More Privacy & Image Tools
Complete privacy toolkit — blur, redact, and strip metadata from images.
Blur Image
Apply smooth Gaussian blur to photos — subtle to heavy obscuring.
Redact Image
Draw permanent black redaction boxes over sensitive image areas.
Bulk EXIF Stripper
Remove GPS and camera metadata from multiple images in one batch.
Image Metadata Viewer
See what GPS, camera, and author data is embedded in your images.
Pixelate Image — Frequently Asked Questions
Common questions about pixelating images online