How to Blur a Face or License Plate Before Posting a Photo
A practical guide to hiding faces and number plates in photos, choosing between blur, pixelate and black box, and avoiding the mistakes that undo it.
Posting a street photo, a school event, a car for sale or a dashcam clip? Hiding faces and number plates is courteous, often sensible, and sometimes required. Here is how to do it properly.
Pick the right method
| Method | Looks like | Best for | Weakness |
|---|---|---|---|
| Blur | Soft, natural | Faces in the background, crowds | Light blur over large features can leave a recognisable shape |
| Pixelate | Obvious mosaic | Plates, faces, screens | Coarse pixelation of short text can sometimes be guessed |
| Black box | Solid block | Text, plates, anything that must be unreadable | Looks abrupt |
For faces, blur or pixelate is usually fine as long as you cover enough. For anything with characters in it, such as plates, name badges or house numbers, a black box is the safest choice.
Blurring a face
- Open the face blur tool and add your photo. It stays on your device.
- Drag a box over each face. Cover the whole head, including hair and ears, not just the eyes.
- Look for secondary identifiers: school logos, team numbers, name tags, distinctive tattoos, reflections in windows and mirrors.
- Export. The blur is baked into a new image file.
Blurring a license plate
- Open the license plate tool. Pixelate is preselected.
- Cover the plate, then check for others: cars in the background, plates reflected in shop windows, and dealer stickers or registration labels on the windscreen.
- For a high-resolution photo where the plate is large, switch to Black box.
- Export.
Mistakes that undo your redaction
Covering too little. People are recognisable from their outline, hairstyle and context. Cover generously.
Weak blur on text. Research tools have shown that lightly pixelated or blurred text can sometimes be reconstructed, especially short, predictable strings. Use a black box for text.
Forgetting the metadata. A car photo taken in your driveway may carry GPS coordinates pointing straight at it. NoUpload strips metadata from every export, so the location goes too. Other editors may not, so check with the EXIF viewer if you used something else.
Editing in layers. Some editors save the blur as a separate layer or annotation on top of the original. Always export a new flattened image, never share the project file.
Uploading the unblurred original. Many online blur tools work by uploading your photo to their server, which defeats the purpose for photos of children or bystanders. NoUpload processes everything in your browser.
Quick checklist before posting
- Every face covered, whole head included?
- Plates, badges, uniforms and reflections checked?
- Black box used for any text?
- Exported as a new, flattened image?
- Location metadata removed?