Free Image Blur Tool

The Image Blur Tool is a free online tool that blur images online. apply gaussian blur or pixelate effect. blur selected regions. It runs entirely in your browser with no installation or sign-up needed.

Yes — draw a selection rectangle on the image to blur only that region.

Gaussian blur (smooth) and pixelate (blocky mosaic effect).

Yes, completely free.

Absolutely. The Image Blur Tool processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Image Blur Tool is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Image Blur Tool in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

The Image Blur Tool supports common image formats including PNG, JPG/JPEG, WebP, and GIF. Some features may also support SVG and BMP depending on the specific tool.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Image Blur Tool works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Gaussian blur smears each pixel into its neighbours to create a soft, continuous haze that looks natural and is great for backgrounds or a gentle out-of-focus effect. Pixelate instead replaces square blocks of the image with their average colour, producing the classic mosaic censor look. The key difference for privacy is permanence: a light Gaussian blur can sometimes be partially reversed by sharpening software, while pixelation discards the underlying detail and replaces it with flat blocks, making it harder to recover. So for purely aesthetic softening, Gaussian is the better pick, but for redacting a face, license plate, or account number you intend to share publicly, choose a strong pixelate setting. This tool offers both, so you can preview each one on your own image and decide which suits the job before downloading.

It depends on how aggressively you blurred it. A faint Gaussian blur retains some of the original signal, so sharpening and deconvolution software can sometimes reconstruct a readable version of lightly blurred text or faces. That is why a weak blur is not a reliable way to hide truly sensitive details. Heavy pixelation is much safer because each block is collapsed to a single average colour, permanently discarding the fine detail that would be needed to rebuild the image. To redact something securely with this tool, push the Intensity slider high and prefer pixelate over a gentle Gaussian, especially for numbers and small text where partial recovery is easiest. Preview the result at full size before saving to confirm nothing readable remains underneath the effect.

The Intensity slider runs from 1 to 50. For Gaussian blur the value is the blur radius in pixels, so higher numbers spread each pixel further and erase more detail. For pixelate the value sets the mosaic block size, so larger numbers produce bigger, coarser blocks. For light aesthetic softening of a background, a low value around 5 to 10 is usually enough. To genuinely obscure a face, address, or account number, push the slider well up — heavy pixelation at a high setting is the most reliable, since faint blurs can be partially recovered. Because the preview updates automatically as you drag the slider and switch effect type, you can watch the detail disappear in real time and stop at the point where nothing readable remains. Always check the area at full resolution before downloading.

This tool blurs by area rather than by detecting people automatically, so the approach depends on where your subject sits. If the subject fills the frame and you only need to soften the edges or a corner, switch to Selected Region mode and drag a rectangle over the area you want hidden, leaving the rest sharp. For a true subject-versus-background separation where the foreground has an irregular shape, a rectangular selection cannot trace around a person precisely, so this tool is best suited to rectangular regions or full-image softening. A common workflow is to apply a full-image Gaussian blur for a soft, low-distraction backdrop behind text overlays on banners and social posts. Pick Gaussian for the most natural haze, set a moderate intensity, and preview before saving the result as a PNG.

Every edited image is saved as a standard PNG file, regardless of whether you uploaded a JPG, WebP, GIF, or PNG to begin with. The downloaded file keeps your original name with a _blurred suffix added, so a photo called receipt.jpg becomes receipt_blurred.png, making it easy to tell the edited copy apart from the source. PNG is a lossless format, so the unblurred parts of your image stay crisp with no extra compression artefacts, and if your original had a transparent background that transparency is preserved in the output. Because PNG is universally supported, the file drops straight into documents, slides, websites, chat apps, or any other image editor for further work. Just adjust the effect, intensity, and area to taste, then click Download PNG to save it to your device.