About the Blur Image
Blur Image lets you hide parts of a picture. Press and drag on the photo to mark one or more rectangles, choose Blur or Pixelate, set how strong the effect is, and see the result straight away. You can also apply it to the whole picture. The tool does not find faces or number plates for you and it cannot blur a background automatically: you choose the areas yourself. The saved copy has no metadata copied from the original. Everything is processed in your browser, and light blur is not a guaranteed way to hide sensitive details.
Updated September 2026
How to use the Blur Image
- 1Select a photo, or drop one on the page.
- 2Press and drag on the picture to mark an area. Repeat for other areas.
- 3Choose Blur or Pixelate and move the Strength or Block size slider.
- 4Use Undo last area or Clear areas to change your mind, or choose Whole picture.
- 5Click Download.
Blur or pixelate: which to use
Blur is gentle and looks natural, so it suits softening a background or a distracting object. Pixelate is blunt and obvious, which is what you want when the goal is to make something unreadable.
Try both on the same area and compare. If you can still guess what is underneath, raise Strength for blur, or the Block size for pixelate, until you cannot.
Drawing areas on your photo
Press and drag on the picture to draw a rectangle. Areas smaller than a couple of pixels are ignored so an accidental tap does nothing. Each area is numbered, and Undo last area removes the newest one.
Draw the box a little bigger than the thing you are hiding, because blur fades at the edges and the effect is weaker there. Overlapping boxes apply the effect twice, which makes that part stronger.
Hiding private details properly
Blurring is a visual disguise, not a lock. Anyone with the same file could try to sharpen it, and small blurs on large text may still be legible. When the information really matters, use a large pixel block or fill the area with a solid colour.
The saved copy is a new image with no metadata from the original. Check the result at full zoom before sharing.
- Zoom in on the finished image before you post it.
- Cover account numbers, addresses and faces completely.
- Keep the original file separate from the edited copy.
Working on a phone
The picture area does not scroll while you drag, so you can draw with a finger. Scroll the page with the controls below the photo instead. Rotate the phone to landscape for a bigger preview.
Big photos are previewed at a reduced size to keep things fast, then the effect is applied again at full size on download. If the result looks different at the edges, lower the strength. Use Crop Image first to cut away parts you do not need, or Image Resizer for a smaller file.
Features
- Draw as many areas as you need
- Blur or pixelate
- Adjustable strength and block size
- Live preview while you work
- Whole-picture option
- Numbered areas with undo
- Full-size download, JPG stays JPG
- Private: photos stay on your device
Frequently asked questions
How do I blur just part of a photo?
Open the photo, then press and drag over the area you want to hide. A dashed box with a number appears and the preview shows the blur. Draw more boxes if you need them, then click Download. Areas you do not mark stay sharp.
Is blurring a face or number plate safe enough?
Not always. A light blur can sometimes be partly reversed by software, and text under a mild blur may stay readable. For sensitive details use Pixelate with a large block size, or cover them with a solid box using Add Text to Image. Zoom in on the result to check.
What is the difference between blur and pixelate?
Blur smooths the area into a soft haze. Pixelate replaces it with a mosaic of large coloured squares. Pixelate with big blocks removes more detail and is usually the better choice for hiding text, faces and plates.
Can it blur the background automatically?
No. This tool does not detect people or objects. You mark the areas yourself, which also means you can blur only what you want. To blur a background, mark rectangles over it, or choose Whole picture if everything should be softened.
Does the photo get uploaded?
No. The photo is decoded and processed by code running in your browser tab. Nothing is sent to a server, and the saved copy is created on your device.
Which format is the result?
A JPG stays a JPG at high quality, and any other format is saved as a PNG. The saved copy does not carry the original's camera details, dates or location.