PureTools
Image Blur
Blur any image online, free, no watermark, no upload. Blur the full image or draw a zone to hide faces, plates and private details.
Drop your image here
or click to browse, JPG, PNG, WEBP · max 50 MB
Result
How to use the Image Blur tool
- Upload your image, click the upload area or drag and drop a JPG, PNG or WEBP file (up to 50 MB). Your image is loaded directly in your browser; nothing is sent to any server.
- Choose a blur mode, select Full Image to blur the entire photo, or Zone Only to target a specific area such as a face, a license plate, or personal details in a screenshot.
- Set the blur radius, drag the Blur slider from 1 px (subtle, barely visible) up to 50 px (heavy, opaque blur). The canvas updates live so you can preview the effect instantly before downloading.
- In Zone mode: draw the blur area, click and drag on the image to draw a rectangle over the area to blur. Resize it using the eight handles or move it by dragging inside the box. The blurred zone updates in real time as you adjust.
- Select output format and quality, choose PNG for lossless output, JPG or WEBP for smaller files.
- Apply and download, click "Apply Blur". The result appears instantly with its dimensions and file size. Click Download to save. No watermark is added.
Frequently asked questions
Does the Image Blur tool add a watermark?
No. PureTools Image Blur adds absolutely no watermark to your blurred images. The output is a clean file containing only your image with the blur effect applied, nothing else. Your image is processed entirely in your browser using the Canvas API and is never sent to any server. The downloaded file is intended to be ready for publishing, sending or archiving without branding, upgrade banners or hidden promotional overlays.
What is the difference between Full Image blur and Zone blur?
Full Image blur applies the Gaussian blur effect uniformly across the entire image. Zone Only blur lets you draw a rectangle on the image to target only a specific area, for example, blurring a face, a license plate, or personal details in a screenshot, while the rest of the image stays sharp.
Is my image uploaded to a server?
No. Your image never leaves your device. The entire blurring process runs client-side in your browser using the Canvas API and Web Workers. No data is sent to any server, no account is required, and nothing is stored after you close the tab. PureTools has no backend, it is a 100% static site. Because processing is local, the upload speed of your internet connection does not affect the resize, and private photos never need to leave your device. Your data is never used to train AI models or improve machine learning systems.
What blur radius should I use to hide faces or license plates?
For strong anonymization of faces or license plates, a blur radius of 20–50 px is recommended. The tool automatically scales the radius to the full image resolution when exporting, so the visual effect is consistent regardless of how the image is scaled in your browser. A higher value produces a heavier, harder-to-reverse blur. To check what metadata remains after blurring, see the EXIF Viewer.
Which image formats are supported?
You can upload JPG, PNG and WEBP files. When downloading the blurred result, you can choose between PNG (lossless, best for graphics), JPG (smaller file size, best for photos), or WEBP (best balance of quality and size). The quality slider lets you fine-tune JPG and WEBP output. If you need a different format afterward, use the Image Converter to convert the exported file while keeping the workflow local and private.
Can I use the Image Blur tool on a phone or tablet?
Yes. The tool is fully touch-enabled. In Zone blur mode you can draw and reposition the blur zone with your finger or stylus. All buttons meet the 44 px minimum tap target size recommended for mobile usability, and the result appears as a fullscreen overlay on small screens. The layout switches to a single-column editor on small screens so the preview, controls and download action remain reachable without horizontal scrolling.
How do I blur only part of an image?
Switch to Zone Only mode using the mode buttons at the top of the editor. Then click and drag on the image to draw a rectangle over the area you want to blur. You can resize it using the eight handles or drag inside it to reposition. Adjust the blur radius slider to control the intensity, then click Apply Blur.
What is the maximum image file size?
The tool accepts images up to 50 MB. This limit exists to protect your device RAM during processing. The blur and encode operation is handled in a background Web Worker so your browser remains responsive. For most photos and graphics this limit is well above what you will encounter. On older phones or low-memory tablets, a smaller image may still be more reliable because browsers reserve memory for both the original and processed result.
Are my blurred images saved after I close the tab?
No. PureTools stores nothing between sessions. All image data lives in temporary browser memory and is freed when you close the tab. No file content, blur settings, or personal data are ever written to localStorage, cookies, or any server. Download your result before closing. If you reopen the tool later, it starts clean with no memory of the previous image, selected zone, file name or exported Blob URL.
What browsers are supported?
The tool works in all modern browsers: Chrome, Firefox, Edge, Safari (desktop and iOS), and Samsung Internet. It requires Canvas API support, which is standard in any browser released after 2019. No plugins, extensions, or downloads are needed. If a corporate browser blocks file APIs or workers, try a current personal browser; the tool will show an error instead of uploading anything elsewhere.