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Blur Part of an Image

Blur part of an image

Drop an image and drag a box over the part you want to hide, whether that is a name, a face, or a detail in the background. The region is blurred live while everything else stays sharp, you set the strength, and you can add several boxes. Download as PNG or JPG. It runs in your browser, so the image is never uploaded.

  • Files never leave your device
  • Runs in your browser
  • Free, no signup

How it works

  1. 1

    Drop an image

    Add a JPG, PNG, WebP, GIF or AVIF. It is drawn to a canvas in your browser, with no upload.

  2. 2

    Box what to hide

    Drag a box over each area you want to blur. The rest of the image stays untouched.

  3. 3

    Set strength and save

    Raise the blur until the area is unreadable, then download as PNG or JPG.

What this blur tool gives you

Blur only what you choose

Draw one or more boxes to hide names, faces or details, while the rest of the image keeps its original sharpness.

Adjustable strength

Slide the blur from a gentle de-emphasis to a heavy wash that leaves no readable structure behind.

Edited locally, never uploaded

The image stays in your browser tab, so sensitive screenshots and photos never touch a server.

Where this helps

Screens

Hiding screen details

Blur a name, email or balance on a screenshot before you share it in a guide or ticket.

Privacy

Anonymising people

Blur a face or a badge in a photo without sending the picture anywhere.

Redact

Masking documents

Cover an ID number or address in a photo of a document before sending it on.

Photos

Cleaning backgrounds

Blur a distracting sign or label in the background of an otherwise good shot.

Tips that help

  • 1

    Leave a margin

    Box a little wider than the thing you are hiding so no readable edge is left showing.

  • 2

    Check at full size

    A blur can look complete in the preview but stay readable at full resolution. Zoom in before saving.

  • 3

    Sensitive data? Pixelate

    Blur smears detail rather than removing it. For anything truly sensitive, pixelation is harder to reverse.

  • 4

    At the edge? Crop instead

    If the thing to hide sits near a border, cropping it out removes the data completely.

Blurring part of an image: hiding the right thing the right way

Sometimes you only want to hide one part of an image: a name on a screen, a face in a crowd, a sign in the background, a sensitive detail in a document photo. This guide covers how a selective blur works, how to pick the area cleanly, and when a blur is the right tool versus a hard pixelation.

Selecting the area

Drag a box over exactly what you want to hide, with a little margin so no readable edge is left showing. A box that is slightly generous is safer than one that clips the content you meant to cover.

Blur part of an image

You can add as many boxes as you need, each blurring its own region while the rest of the image stays sharp. This is what makes a selective blur useful for screenshots, where you might hide several fields at once.

If you misplace a box, undo removes the last one and clear removes them all, so it is quick to adjust without reloading the image.

How heavy should the blur be

The strength slider controls the blur radius. A gentle blur is enough to de-emphasise something, but for hiding readable text or a face you want it heavy enough that the content is an even wash with no structure left.

Remember that blur smears detail rather than removing it. For everyday sharing that is fine, but for anything truly sensitive, pixelation with a large block size is harder to reverse. The pixelate tool handles that case.

Always check the result at full size. A blur that looks complete in the small preview can still be readable when the image is viewed at its real dimensions.

Blur, pixelate, or crop?

Blur is best when you want the hidden area to blend into the picture and not draw attention. Pixelation is best when you want it obvious that something was redacted, and when the detail must be destroyed.

Read more

If the thing you want to hide is at the edge of the frame, cropping it out entirely with the crop tool is cleaner than blurring, and removes the data completely rather than obscuring it.

For hiding a specific face rather than an arbitrary area, the face blur tool is set up for exactly that, with guidance on covering a face fully.

Frequently asked questions

Honest answers to what people ask before using this tool.

Drop the image, leave the mode on 'Selected areas', and drag a box over the part you want to hide. That region is blurred live while the rest stays sharp. A strength slider sets how heavy the blur is, and you can add several boxes. Download as PNG or JPG. It all runs in your browser, so the image is never uploaded.

Yes. Drag a box over each area you want to obscure and they are all blurred at once. Undo removes the last box and clear removes them all, so you can fix a misplaced box without starting over.

Blur softens the area into a smooth smear that blends into the photo, while pixelation replaces it with a coarse grid of blocks. Blur looks more natural; pixelation reads more clearly as 'this was hidden'. For sensitive data, pixelation discards the underlying detail, so it is the safer choice.

You can blur large regions of the background by boxing them, but this is a manual rectangle blur rather than an automatic subject cut-out. For a clean background-only blur around an irregular subject, a dedicated background tool will give a tidier edge.

No. Only the boxes you draw are changed. The rest keeps the original pixels and the export is at the image's native resolution, so everything outside your boxes stays exactly as sharp as the original.

No. The image is decoded and edited entirely in your browser on a canvas. Nothing is sent to a server, which you can verify in the Network panel.

Further reading

Independent references if you want to go deeper on the formats and tradeoffs.

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