How do I blur part of an image online?

Drop your image. Switch the region toggle from 'whole image' to 'rectangle.' Drag across the area you want to blur. Slide the radius to set the strength. The preview updates live. Click apply to commit, then download the result.

How do I blur a face in a photo?

Use rectangle mode and drag a box that covers the face plus a small margin. A blur radius of 18–25 px on a typical phone photo makes the face unrecognizable while keeping the rest of the image natural. For very small faces, increase the radius.

Is there a free image blurrer that does not upload?

Yes — this one. The Canvas API runs the blur locally in your browser. Open DevTools and watch the Network tab; the file never leaves your device. No signup, no watermark, no upload step.

Can I blur a whole image at once?

Yes. Keep the region toggle set to 'whole image,' adjust the radius, click apply. Useful for soft-focus backgrounds or simulating a defocus effect on the entire photo.

Does the blur tool work on iPhone Safari?

Yes. The Canvas API and its filter property ship in all modern mobile browsers, including iPhone Safari. Drop a photo, drag the region, set the radius, download. On older phones, very large images may slow the live preview — adjust the radius then wait a beat.

How is blur different from pixelate?

Blur smooths pixel detail with a Gaussian kernel — the result looks like a soft, out-of-focus area. Pixelate replaces pixel detail with chunky mosaic blocks. For privacy redaction, pixelation at sufficient block size is harder to reverse than blur. For a defocus look, blur is the natural choice.

Can the blur be reversed?

Small-radius blur can sometimes be partially recovered with image enhancement algorithms. For irreversible redaction of license plates, names, or numbers, use the pixelate tool at a block size of 16 px or larger. The exact threshold depends on the source resolution.

Why does the saved file look different in another viewer?

The blur is baked into the pixel data. The saved file should look identical anywhere. If you see differences, check the viewer's color management settings — some apps apply gamma or color profile transforms that the original did not. The blur itself is preserved exactly.

FreeInstantNo signup

Blur image — free, instant, in your browser

Blur a face, a plate, or a whole screenshot. Drop a photo, drag a rectangle, slide. Free, no signup.

Drop an image to blur

JPG, PNG, WebP, AVIF, GIF, BMP · single file · 50 MB max

Blur the part that matters, leave the rest sharp

Some pixels need to vanish from a photo before you share it. A face that did not ask to be online. A license plate behind your car. A home address pinned at the corner of a screenshot. A bank balance bottom-right of an app shot. The fix is the same every time: blur the offending region, leave the rest as it was.

This tool runs entirely in your browser. The Canvas API applies a Gaussian blur on the region you drag with your mouse — and only that region. Drag more than one rectangle if there are several faces, names, or numbers to mask. The blur radius slider updates the live preview as you move it; what you see is what you save.

Privacy here is a side effect of the architecture, not a marketing slogan. Open DevTools and watch the Network tab — there are no outbound requests when you process a photo. The image stays on your device. The download dialog at the end saves the masked file straight to your filesystem.

Gaussian blur, region-aware

Pick a radius from 1 px to 80 px. The blur applies to your dragged region only — or the whole image if no region is set.

Multiple rectangles, one slider

Drag as many rectangles as you need. Every region uses the same radius. Click the X on any region to remove it.

Live preview, instant feedback

Drag the slider, watch the blur update on the same canvas. No apply button needed before you commit.

Reasons people blur images

A face you do not have permission to share

Blur the face before posting a group photo to LinkedIn, a meetup recap, or a class album. Soft edges, no awkward explanation.

Your license plate in a car shot

Selling your car? Showing off the new wheels? Blur the plate before posting to Marketplace, Reddit, or Instagram.

Bug-report screenshot with private data

Shipping a screenshot to support? Blur user emails, tokens, or internal URLs visible in the sidebar before sending.

Email or phone number in an app shot

Walkthroughs for documentation often include real account data. Blur identifiers before publishing.

Soft-focus background for a portrait

Drag a rectangle around the background, leave the subject sharp. A cheap depth-of-field look without re-shooting.

Anonymize a chat screenshot

Sharing a chat exchange? Blur usernames and avatars before posting. The conversation stays, the identities do not.

Built for screenshot redaction

Drag-to-blur — no learning curve, no plugin
Multi-rectangle support out of the box
Output format picker — keep source or switch to PNG/JPG/WebP
EXIF metadata stripped on output so location data does not leak

How to blur an image in three steps

Drop your image
JPG, PNG, WebP, AVIF, GIF, BMP — all decoded right in the browser. Files stay on your device.
Drag a rectangle, slide the radius
Switch the region toggle to rectangle mode, then drag across the part you want to blur. Adjust the radius to taste — the preview updates live.
Apply and download
Click apply to commit the blur to a fresh PNG, JPG, or WebP. Download saves to your filesystem.

Tips for clean blurring

Tip 1:
Use the rectangle mode for surgical privacy redactions. Use whole-image mode when you want a soft-focus background effect.
Tip 2:
A blur radius of 12–25 px works for most face-redaction screenshots at 1080p. Bigger radii suit text-heavy regions where the recipient should not even read shapes.
Tip 3:
Multiple rectangles overlap fine — overlapping regions are blurred twice, which can be useful for extra emphasis on a small area.
Tip 4:
When privacy is the goal, prefer pixelation for sensitive numbers. Blur at small radius can be partially reversed by super-resolution; pixelation at ≥16 px blocks is harder to recover.
Tip 5:
Keep the original file around until you confirm the export is correct. Once the blur is baked in, there is no undo on the saved file.

Blur image — frequently asked

Pixelate Image

Mosaic censor a region — harder to reverse than blur.

Image Cropper

Trim the image down to just the part you want to keep.

Rotate Image

Fix orientation before redacting.

Image Resizer

Resize before or after blurring for the right output dimensions.

Image Converter

Re-encode to JPG, PNG, WebP, or AVIF.

Got an image to redact?

Drop it now. Drag a rectangle. Slide the radius. Download in seconds.

Start blurring