What is Photo Blur & Mosaic?
Photo blur and mosaic means making parts of a photo unrecognizable — faces, car license plates, the address and phone number on a shipping label, ID cards, or contracts that shouldn't be exposed. It's an essential step for protecting personal information before posting photos to social media, blogs, or marketplace listings, but most online mosaic sites upload your photo to a server first, leaving you wondering whether it's safe to put a sensitive image online at all.
This tool removes that worry head-on. All processing runs 100% in your browser using Canvas, so your photo is never sent to a server — and there's no app to install, no sign-up, no watermark, and no usage limits. Because it uses manual dragging rather than AI auto-detection, you can mosaic or blur exactly the areas you choose, with no accidental exposure.
Key Features
Mosaic & blur effects
Choose pixelating mosaic or a soft Gaussian blur, and adjust the strength in real time with a slider.
Rectangle & freehand brush
Drag a rectangle for clean areas or paint with the brush for curved shapes. Apply several areas to one photo at once.
Undo & full-resolution export
Undo or reset mistaken areas, then download the finished photo as PNG or JPG at its original resolution.
100% in-browser · EXIF stripped
Your photo never leaves your device, and on save the canvas re-encoding automatically removes EXIF metadata like GPS location for extra safety.
How to Use
- Load your photo — drag and drop a photo or click the area to choose a file. You can also paste a copied image with Ctrl+V.
- Pick effect and mode — choose mosaic or blur, then decide whether to drag a rectangle or paint with the brush.
- Adjust strength — use the slider to set the mosaic cell size or blur radius. In brush mode you can also set the brush size.
- Select areas to hide — drag or paint over faces, plates, addresses, and more. Add as many areas as needed and undo any mistakes.
- Save — choose PNG or JPG and save at the original resolution. EXIF location data is removed automatically.
When to Use It
Hide faces in social posts
Mosaic the faces of people who didn't consent when sharing group or everyday photos, protecting their privacy and image rights.
Cover car license plates
Pixelate license plates before sharing used-car, parking, or accident photos to keep vehicle details private.
Redact labels & documents
Hide the address and phone number on a shipping label, or sensitive fields on contracts and ID cards, for proof photos.
Blur sensitive screenshots
Quickly blur names, account numbers, or card details when sharing email, chat, or payment screens.
Frequently Asked Questions
Is my photo uploaded to a server?
No. All mosaic and blur processing happens directly in your browser using Canvas. Your photo is never sent to or stored on any server, so you can safely edit sensitive images like faces, ID cards, or contracts.
What's the difference between mosaic and blur?
Mosaic pixelates an area into blocky squares so details become unreadable, while blur applies a soft Gaussian smear. Use mosaic when you must firmly hide identities or numbers, and blur when you want a softer, more natural look for backgrounds.
Does it automatically detect and hide faces or plates?
This tool uses manual selection, not AI auto-detection. Automatic detection can miss spots or cover the wrong areas, whereas manual selection lets you hide exactly what you want with no accidental exposure.
Will my image quality drop?
Everything outside the hidden areas keeps its original resolution. On save, the tool re-renders at the full original size rather than the preview size, so only the masked regions are altered and there's no overall quality loss.
Does the saved file keep my location data?
No. Because the photo is re-drawn through the canvas and saved as PNG/JPG, EXIF metadata such as GPS location and camera info from the original is not carried into the result. That adds extra privacy on top of the mosaic.
Can I undo an area I covered by mistake?
Yes. The Undo button removes the most recently added area one at a time, and Reset all clears every area at once. The original photo is preserved, so you can always start over.
Privacy Notice
This tool processes everything 100% in your browser (client-side). The photo you load is handled only on your device via Canvas, and no data is ever sent to or stored on a server. The saved file is also stripped of EXIF metadata (GPS location, camera info, etc.) through canvas re-encoding, so you can edit even sensitive photos with confidence.