Blur entire image or select multiple areas to blur
Click to upload an image or drag & drop
Supports JPG, PNG, GIF, BMP, WebP
In advanced mode, draw rectangles on the image. Each rectangle defines a region to blur. The rest of the image stays sharp. After clicking "Apply blur to areas", the result appears in the preview below. All processing happens locally.
Founder & CEO, Toolraxy
Faiq Ur Rahman is a web designer, digital product developer, and founder of Toolraxy, a growing platform of web-based calculators and utility tools. He specializes in building structured, user-friendly tools focused on health, finance, productivity, and everyday problem-solving.
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The Image Blur Tool is a free, browser-based utility that lets you blur images quickly and privately. Whether you need to obscure sensitive information like faces, license plates, or personal data, or you want to create artistic effects, this tool offers two flexible modes. In simple mode, the entire image is blurred with a adjustable radius. In advanced mode, you can draw one or more rectangles to blur only selected areas, leaving the rest sharp. All processing happens locally on your device—no files are ever uploaded to a server. This makes it ideal for users who value privacy and speed. From social media managers to graphic designers and everyday users, anyone can use this tool without sign‑ups or installations.
Upload an image – Click the upload area or drag & drop an image file (JPG, PNG, GIF, BMP, WebP).
Choose a blur mode – Select “Simple (full image)” to blur the entire picture, or “Select areas to blur” for advanced control.
Adjust blur intensity – Use the slider to set the blur radius from 0 to 20 pixels. The preview updates in real time.
(Advanced mode only) Draw blur areas – Click and drag on the image to draw rectangles. Each rectangle marks a region that will be blurred. You can draw multiple rectangles and remove any by clicking “Remove” below the list.
(Advanced mode only) Apply blur – After drawing rectangles, click “Apply blur to areas” to generate the final blurred image.
Download the result – Choose your preferred format (PNG, JPEG, WebP) and click the “Download” button.
The tool uses HTML5 canvas elements to process images entirely in your browser. No server‑side code is involved.
Simple mode – A canvas is created with the same dimensions as the original image. The canvas context’s filter property is set to blur(radius px), and the original image is drawn onto it. The resulting canvas contains the fully blurred image.
Advanced mode – The original image is first drawn onto a background canvas. A separate hidden canvas generates a fully blurred version of the whole image using the same filter. Then, for each user‑drawn rectangle (stored as normalized coordinates), the corresponding region from the blurred canvas is copied and drawn onto the background canvas. This composites the blurred areas exactly over the original, leaving everything else untouched.
Rectangles are stored as values between 0 and 1 relative to image width and height, making them resolution‑independent. When applying the blur, these normalized coordinates are scaled to the actual pixel dimensions.
The download function captures the final canvas content and converts it to a Blob in the selected image format (PNG, JPEG, or WebP) with appropriate quality settings.
Inputs:
Image: 800×600 pixel photo of a face.
Mode: Advanced.
Blur radius: 8 px.
One rectangle drawn covering the face region: normalized coordinates (x=0.3, y=0.2, width=0.4, height=0.3).
Step‑by‑step:
The tool creates a blurred version of the entire 800×600 image with an 8‑px Gaussian blur.
It calculates the pixel rectangle:
x = 0.3 × 800 = 240 px
y = 0.2 × 600 = 120 px
width = 0.4 × 800 = 320 px
height = 0.3 × 600 = 180 px
It copies the corresponding 320×180 pixel area from the blurred canvas and draws it onto the original image at position (240, 120).
The final canvas contains the original image with only the face region blurred.
Output: An image where the face is blurred while the background remains sharp.
Image blurring is a digital editing technique that reduces sharpness and detail in a picture. It spreads pixels outwards, softening edges and making features less distinct. The most common type is Gaussian blur, which uses a mathematical function to create a smooth, natural‑looking blur. In photography and design, blurring is used both creatively (e.g., bokeh effects) and practically (e.g., hiding sensitive information).
In an era of oversharing and privacy concerns, blurring has become essential for protecting personal data. People often need to share images online but want to obscure faces of bystanders, license plates, home addresses, or confidential text. Blurring ensures compliance with privacy regulations (like GDPR) and helps prevent identity theft. For content creators, blurring can also draw attention to a subject by softening a busy background.
Blur radius – A larger radius creates a stronger, more diffuse blur. Too small may not hide details; too large can make the image unrecognizable.
Selection accuracy – In area‑based blurring, precisely defining the region to blur is critical. Jagged edges or incomplete coverage can leave sensitive parts visible.
Image resolution – Higher‑resolution images require larger radii to achieve the same visual effect, because pixels are smaller.
Output format – JPEG compression can introduce artifacts that interfere with blur, while PNG preserves the blur exactly.
Privacy protection – Blurring faces in crowd photos, obscuring car plates in accident pictures, or hiding personal information in screenshots.
Social media – Creating background blur to make a product or person stand out.
Medical imaging – Anonymizing patient data in medical photos before publication.
Graphic design – Adding depth of field effects, softening textures, or preparing images for watermark placement.
E‑commerce – Blurring background distractions to focus on a product.
Enhances privacy without cropping the image.
Maintains image context while hiding details.
Can be applied selectively, unlike pixelation which often looks harsh.
Non‑destructive when done in layers (original remains unchanged).
Over‑blurring can make an image unusable.
Blurring is not always reversible; once applied, original detail is lost.
May not be sufficient for highly sensitive data if the blur radius is too small or if the region is not completely covered.
Some file formats (like low‑quality JPEG) can introduce compression artifacts that reduce blur effectiveness.
Using too small a radius, leaving details still recognizable.
Blurring only part of a sensitive area (e.g., eyes but not the whole face).
Forgetting that text may still be readable if blur is weak.
Not checking the final image in different sizes – blur can become more apparent when scaled down.
Uploading images to online tools that do not guarantee privacy.
Professional image editors like Photoshop and GIMP offer sophisticated blur filters, but they require installation and expertise. Online blur tools fill the gap for quick, casual use. The trend is toward client‑side processing to address privacy concerns – users are increasingly wary of uploading sensitive images to servers. This tool aligns with that movement by performing all operations locally.
| Feature | Simple Mode | Advanced Mode |
|---|---|---|
| Blur type | Full image | Selected areas |
| Use case | Obscure whole image | Hide specific parts |
| Ease of use | One click | Draw rectangles |
| Precision | Low | High |
| Best for | Anonymizing entire photos | Protecting faces, text, plates |
Complete privacy – All image processing happens in your browser; no files are uploaded to any server.
No registration required – Start blurring immediately without creating an account or signing up.
Two flexible modes – Simple full‑image blur for quick tasks, and advanced area selection for precise control.
Real‑time preview – See the effect instantly as you adjust the blur radius or draw rectangles.
Multiple output formats – Download as PNG, JPEG, or WebP to suit your needs.
Works on any device – Responsive design makes it usable on desktops, tablets, and smartphones.
Free and unlimited – No hidden costs, no watermarks, and no limits on the number of images.
Educational value – Learn how selective blurring works through interactive drawing.
This tool is provided “as is” without any warranties. While every effort is made to ensure accurate blurring, the user is responsible for verifying that sensitive information is adequately obscured before sharing images. The developers are not liable for any misuse or data loss.
Yes, it is completely free to use. There are no paid features, subscriptions, or watermarks.
No. All processing is done locally in your browser. Your images never leave your device.
Yes. In advanced mode, you can draw as many rectangles as you need. Each rectangle defines a separate area to blur.
Below the canvas, a list shows all rectangles. Click the “Remove” button next to any rectangle to delete it. You can also click “Clear all” to remove every rectangle.
Ensure you click “Apply blur to areas” in advanced mode before downloading. In simple mode, the preview updates automatically. If the download button doesn’t work, try a different format (e.g., PNG instead of JPEG).
Yes, use advanced mode and draw rectangles around the subject to keep them sharp; the background will remain unblurred. Alternatively, draw around the background to blur it – the choice is yours.
Blurring intentionally reduces sharpness in selected areas, but the rest of the image remains at original quality. If you download as JPEG, some compression loss may occur; PNG preserves quality exactly.
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Blur faces, license plates, or sensitive information before sharing photos online
Create focus effects by blurring backgrounds
100% free with no watermarks
Unlike most online blur tools, you can select EXACT areas to blur
Our Online Image Blur Tool is designed for simplicity and effectiveness. Unlike basic blur tools that only work on entire images, our tool gives you precise control over which parts of your image to blur. Whether you need to protect sensitive information, hide faces or license plates, create artistic effects, or anonymize documents, this tool provides the perfect solution. Everything runs directly in your browser – no images are uploaded to servers, ensuring complete privacy and security.
It works directly in your browser and supports popular formats like JPG, PNG, and GIF. No software installation is needed — just upload, convert, and download.
Upload Your Image
Click “Choose Image” or drag and drop your photo
Supports JPG, PNG, WebP, and other common formats
Select Blur Mode
Select Area: Click and drag on the image to choose specific regions to blur
Whole Image: Apply blur to the entire photo
Choose Blur Type
Gaussian Blur: Smooth, natural-looking blur
Stack Blur: Fast processing with good results
Box Blur: Uniform blur effect
Motion Blur: Directional blur for dynamic effects
Adjust Blur Intensity
Use the slider to control how strong the blur effect appears
Preview changes in real-time
Apply & Download
Click “Apply Blur” to process your image
Download the result with one click
Use “Reset” to start over with a new image
Yes, completely free with no hidden costs, watermarks, or usage limits.
Absolutely. All processing happens in your browser – images are never uploaded to any server. Your photos stay on your computer.
We support all common formats: JPG, PNG, GIF, WebP, BMP, and more.
You can use the “Reset” button to start over with your original image, or simply refresh the page.
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