Blur Faces and Details in Photos
Automatically detect and blur faces, or mark licence plates and details to blur, pixelate or black out. Runs on your device for privacy.
- Upload
- Options
- Download
- ✓ 100% free
- ✓ No sign-up
- ✓ No limits
- 🔒 Files never leave your device
How to: Blur Face
- Select a photo.
- Click “Detect faces” and/or drag over areas to hide.
- Choose blur, pixelate or black box and download.
Before posting photos of crowds, children or street scenes, it is good practice – and sometimes a legal requirement under privacy laws such as GDPR – to hide faces and licence plates. This tool finds faces with on-device AI so the photos never leave your device.
Common uses
- Protect children's privacy in school or event photos.
- Anonymise bystanders in street photography.
- Hide licence plates before selling a car online.
Tips for best results
- Check the result – small or turned faces can be missed; add boxes by hand.
- Pixelate or black out for stronger anonymisation than blur.
Why use FreePDF for Blur Face?
| FreePDF | Typical upload-based sites | |
|---|---|---|
| Files uploaded to a server | No – processed on your device | Yes |
| Sign-up required | Never | Often for bigger jobs |
| Hourly / daily task limits | None | Common on free plans |
| Watermark on output | Never | Sometimes |
| Works offline after loading | Yes, for most tools | No |
Frequently asked questions
How does automatic face detection work?
A small AI model runs in your browser to find faces. It can miss tiny or turned faces, so check the result and add boxes by hand if needed.
Can the blur be reversed?
The hidden area is heavily blurred several times and saved as new pixels; for maximum safety use the black box mode.
How does face detection work?
A small AI model runs in your browser to find faces. It can miss tiny or turned faces, so check the result and add boxes by hand if needed.
Is Blur Face really free?
Yes. Every tool on FreePDF is 100% free with no file limits, no sign-up and no watermarks. The site is supported by unobtrusive ads.
Are my files uploaded to a server?
No. FreePDF processes your files directly in your browser using JavaScript. Your documents never leave your device, so they stay completely private.
Does it work on mobile?
Yes. FreePDF works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux.