Image mosaic - Mosaic
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Major formats supported. Full extension list is below.
Batch: up to 5 files / 35MB total.
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Output
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Blur and Pixelate

Classic pixel, blur, and posterize mosaic effects
Mosaic style
Pick a style first, then adjust strength.
Apply area
Use Selection only to paint/select specific regions.
Selection tool
Brush/eraser only. Use shape + spacing for detailed control.
Tool size
px
Selection actions
No selection.
Strength
/100
Block size
px
Used by Pixelate and Pixel + Blur styles.
Blur radius
px
Used by Blur and Pixel + Blur styles.
Color levels
levels
Used by Posterize style.
Output quality
/100
Higher quality keeps more detail in JPEG/WebP output.
Live summary
Style: Pixelate · Strength 55/100 · Block 24px
Ready

Redaction guide for sensitive regions

For privacy redaction, apply effects only to selected regions and verify output at final delivery size. A blur that looks strong at full resolution can become weak after platform downscaling, so review the uploaded result when possible.

Pixelate works well for faces and license plates at moderate strength. Blur can be cleaner for document backgrounds. Posterize helps hide subtle gradients but should be tested carefully for readability leaks around edges.

Is blur always enough for personal data?

No. Increase strength and area coverage, and inspect edges. If needed, combine blur with larger block/pixel settings.

Should I redact before or after resize?

Usually after final resize target is known. This keeps redaction strength aligned with the delivered dimensions.

Can I undo selection mistakes?

Yes. Use selection undo/redo controls and recheck all regions before export.

Related privacy and delivery tasks

Searches this redaction page is built to satisfy

This page is designed for searches such as blur part of image, pixelate face online, redact photo before sharing, blur license plate, and hide personal details in image. It is intended for privacy cleanup before delivery, moderation, publishing, and customer support workflows.