Sharing event photos, street photography, or screenshots often means other people's faces end up in the frame without their consent. Manually cropping people out isn't always practical — blurring just the face is faster and keeps the rest of the photo intact.
This guide covers how to blur faces in a photo for free, using both automatic AI detection and manual region drawing.
Key Takeaway: Auto Detect uses an AI face-detection model (BlazeFace) to find every face in an image, then applies a blur over each region — no manual selection needed unless the AI misses one.
When You Need to Blur Faces
- Journalism — protecting witnesses or sensitive subjects in news photography
- HR and corporate content — anonymizing employees in public-facing materials
- Social media — blurring bystanders or children in event photos before posting
- GDPR compliance — publishing identifiable faces without consent can be a data protection violation in the EU; blurring is the standard technical fix
Auto Detect vs. Manual Region
| Mode | Best for |
|---|---|
| Auto Detect Faces | Group photos, multiple faces, fast turnaround — finds faces automatically using an AI model |
| Manual Region | Faces the AI missed, partial faces, profile angles, or blurring something other than a face (license plates, text, logos) |
Tip: Run Auto Detect first, then switch to Manual Region to catch any face the AI model missed — the two modes work together.
Choosing the Right Blur Intensity
A light blur (around 5–10) keeps the face recognizable as a person but obscures fine detail — fine for casual use. For legal, journalistic or GDPR-sensitive contexts, use 25 or higher so the face truly cannot be identified.
Step by Step: How to Blur Faces in a Photo
TinyPNG Now includes a free face blur tool that runs entirely in your browser.
- Open the Blur Face tool and upload your photo.
- Click Auto Detect Faces to find and blur every face automatically, or use Manual Region to draw your own boxes.
- Adjust the Blur Intensity slider — higher for full anonymization.
- Click Download to save the result as a PNG with no watermark.
Frequently Asked Questions
Does face blurring upload my photos?
No. All processing is done entirely in your browser using JavaScript and the Canvas API. Your images never leave your device and are never sent to any server.
Can I blur multiple faces at once?
Yes. Auto Detect mode uses TensorFlow's BlazeFace model to identify all faces in the image automatically, and every detected face is blurred in one step. Manual mode can add extra regions on top of the auto-detected ones.
What image formats are supported for face blurring?
JPG, PNG and WebP are supported as input formats. The blurred image downloads as a PNG file to preserve full quality without extra compression artifacts.
Can I adjust how strong the blur is?
Yes. The Blur Intensity slider ranges from 5 (light blur, face partially visible) to 40 (heavy pixelation, face fully anonymized). For legal or journalistic use, 25 or above is recommended so the face cannot be identified.
Why does GDPR matter for face blurring?
Under GDPR, publishing identifiable faces of individuals without consent can be a data protection violation in the EU, so blurring faces before publishing event or street photography is a standard compliance practice.
Summary: Open the free TinyPNG Now face blur tool, run Auto Detect, fine-tune with Manual Region if needed — free, private, and instant.
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