Pixelation can make faces, labels, and screen details less readable, but it is an editing effect rather than guaranteed secure redaction. For credentials, identity numbers, medical details, or other high-risk data, completely remove or cover the information with a solid block and flatten the exported image.
Pixelate a photo step by step
- Work from a copy of the original image.
- Open the Pixelate Image tool.
- Choose whole-image or selected-region mode.
- Cover the complete sensitive area, including margins around characters.
- Increase block size until the content is unreadable at full zoom.
- Export a new PNG and close the original before reviewing the result.
Why light pixelation may fail
Large text or predictable content can remain recognizable through small blocks. Context can reveal a hidden value even when individual characters are unclear. Image processing and comparison with another copy may also recover clues. Increasing the effect improves obscurity but does not turn pixelation into a formal redaction method.
Use a solid mask for sensitive data
Current ICO guidance warns that simple blur or pixelation may be reversible and recommends secure methods that irreversibly remove information. For high-risk publication, replace the region with an opaque solid color, export to a flat image format without layers or edit history, and verify the final file independently.
Remove hidden information too
A screenshot or photo may contain location metadata, filenames, notifications, reflections, or background details outside the selected area. Crop unnecessary surroundings, remove metadata with the Metadata Remover, and inspect the final file at full resolution.
Blur, pixelate, or crop?
- Crop when the sensitive area is outside the subject and can be removed entirely.
- Solid redaction for secrets or regulated personal information.
- Pixelation for a visual privacy cue when reversibility is not a serious risk.
- Blur for aesthetic de-emphasis, not dependable text redaction.
Final verification checklist
Open the exported file in a different viewer, zoom to 100% and beyond, check every corner, inspect metadata, and confirm the original layer or edit history is absent. Ask a second person to review high-impact disclosures. Keep the unredacted original in approved secure storage, not beside the public copy.
Frequently asked questions
Is heavy pixelation safe for passwords or identity numbers?
Do not rely on it. Remove the secret from the source copy or cover it with an opaque block, flatten the image, and independently verify the exported pixels. High-impact disclosure may require approved redaction software.
Should I pixelate a face or crop it out?
Cropping removes the face when it is outside the needed composition and is usually stronger. When the person must remain in context, use a sufficiently strong privacy treatment and obtain consent where appropriate.
Does exporting PNG remove the original information?
A flattened PNG can remove editable layers, but only if the sensitive pixels were actually replaced before export. It may still retain other metadata or visible clues, so inspect the final file rather than assuming the format guarantees privacy.
Sources checked
Image disclosure and location-privacy guidance was reviewed on August 12, 2026; recheck the linked authorities before relying on pixelation for sensitive redaction.