Blur or pixelate any image in your browser
Hide faces, licence plates, addresses and other details with a real Gaussian blur or mosaic pixelation. Whole image or just a rectangle you draw. Everything runs in your browser, and your image never leaves your device. No upload, no sign-up, no watermark.
- Blur or pixelate
- Rectangle selection
- Live preview
- JPEG, PNG, WebP output
Drop an image here
or click to choose JPG, PNG, WebP, GIF or AVIF
Runs locally in your browser. No upload.
- Runs in your browser
- No upload
- No sign-up
- Blur or pixelate
- Rectangle selection
- Works offline
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How this compares to other blur tools
Most online blur tools upload your image to a server. This one runs locally in your browser. Same output, no upload.
| Feature | TToolDeck | Desktop editors | Typical online tools |
|---|---|---|---|
| Runs entirely in your browser | Yes | No | No |
| Image never sent to a server | Yes | No | No |
| No sign-up or account | Yes | Yes | No |
| Blur whole image or rectangle | Yes | Yes | Yes |
| Pixelate (mosaic) effect | Yes | Yes | Partial |
| Drag selection with live preview | Yes | Yes | Yes |
| Adjustable blur radius | Yes | Yes | Partial |
| JPEG, PNG and WebP output | Yes | Partial | Partial |
| Free without paywalls | Yes | No | Partial |
| Works offline after page loads | Yes | No | No |
Comparison reflects publicly available information at the time of writing. Features may change.
How it works
- 1
Drop your image
Choose a JPG, PNG, WebP, GIF or AVIF file. It is read in your browser. Nothing is uploaded.
- 2
Pick blur or pixelate
Choose the effect, choose whole image or a rectangle, then adjust the strength. Drag on the preview to draw the rectangle.
- 3
Export the result
Pick JPEG, PNG or WebP, set the quality, click the button and download. No watermark, no sign-up.
Everything you get for free
Blur or pixelate
Two classic ways to hide detail. Gaussian blur for a soft fade, pixelation for the mosaic look you see on TV. Pick whichever fits the image.
Whole image or rectangle
Blur the entire photo, or draw a rectangle over the face, plate, receipt or address that needs to disappear. Just the rectangle is affected.
Drag to draw the rectangle
Click and drag on the preview to draw the region. Move the rectangle by dragging inside it. Numeric inputs let you type exact coordinates when you need them.
Adjustable strength
Blur radius from 1 to 60 px. Pixel block size from 2 to 80 px. Match the strength to how much detail you need to hide.
Live preview
The preview shows the effect live as you adjust sliders or drag the rectangle. No need to commit and see the result after processing.
JPEG, PNG and WebP output
Pick the format. JPEG for photos, PNG for images that need transparency preserved, WebP for a smaller file on the web.
Adjustable output quality
For JPEG and WebP, control the encoder quality from 40 to 100 percent. Dial it down for a smaller file, up to keep every bit of detail.
Nothing leaves your device
The image is read from local disk, processed in a canvas in your browser tab and saved back to local disk. Nothing about the file is uploaded anywhere.
What people use it for
Hide faces in a photo
Blur faces of bystanders, children or anyone who did not consent before you post a photo publicly. Draw a rectangle over each face and export.
Censor a licence plate
Hide car and motorbike plates from photos you share online. A rectangle and a strong blur is faster than opening a desktop editor.
Redact addresses and receipts
Blur addresses, phone numbers and card details on scans of receipts, invoices or paperwork before emailing them to someone.
Soften backgrounds
Blur the whole image then crop out a sharper foreground, or just blur a distracting background behind a product shot.
Preview an image before posting
Pixelate NSFW or spoiler content into a soft preview that people can click through to see the original elsewhere.
Add a mosaic look
Pixelate a whole image for a retro or mosaic aesthetic, or blur to give a photo a soft, dreamy feel.
Questions people ask
Is my image uploaded to a server?
No. Everything runs in your browser using the HTML5 canvas API. The image is read from local disk, processed in memory and saved back to local disk. Nothing is sent anywhere, and no data about the image, its name or its contents reaches any server.
Which image formats can I open?
Any format your browser can decode: JPG, PNG, WebP, GIF, AVIF and most modern formats. HEIC is not supported by most browsers; convert HEIC to JPG first with our HEIC to JPG tool.
What is the difference between blur and pixelate?
Blur uses a Gaussian filter that softens detail smoothly. Pixelate downsamples the image into big blocks, giving the mosaic look you see on TV when a face is hidden. Both hide detail. Blur looks softer, pixelate looks chunkier and is often more recognisably "hidden" to a viewer.
Can I blur just part of the image?
Yes. Choose Rectangle in the Region toggle, then drag on the preview to draw the area. Only that rectangle is blurred. The rest of the image is untouched.
How strong should the blur be?
For hiding a face or plate in a photo at 1000 to 2000 pixels wide, 20 to 40 px is usually enough. For a very high-resolution image, go up. If in doubt, blur harder: a weak blur can sometimes be reversed.
Is the blur reversible?
A Gaussian blur with a small radius can sometimes be partially reversed with research-grade deconvolution tools. If you need the hidden content to be truly gone, use pixelation with a block size of 20 or more, which is far harder to reverse.
Which output formats are supported?
JPEG, PNG and WebP. JPEG is best for photos, PNG if you need transparency, WebP for smaller files that render in every modern browser.
Does it add a watermark?
No. There is no ToolDeck watermark and no metadata is added. The output is exactly what the canvas produced.
Can I blur multiple rectangles in one image?
Not in a single pass. But you can blur the first rectangle, download the result, reopen it and blur another rectangle. Each pass is quick.
Does it work on mobile?
Yes, in modern mobile browsers. Touch drag works for drawing the rectangle. Processing very large images on a phone uses more memory than on desktop but the tool will still work.
Can I undo a blur?
Before you export, change the sliders or redraw the rectangle and the preview updates. The original file is never modified. Once you export and close the tab, the original is only wherever you saved it.
Does it preserve EXIF data?
No. The output has no EXIF metadata. That is usually what you want when redacting: the original camera data, GPS location and timestamp are gone with the export.
What is the maximum image size?
The practical limit is device memory and the browser canvas cap, which is usually around 16,000 pixels per side. Images up to about 50 megapixels process fine on a modern laptop.
Can I use this for legal redaction?
For casual sharing, yes. For formal legal redaction where you need a certified process, use a tool that rewrites the pixels and strips the entire metadata layer in a documented way, and keep a chain-of-custody record. Blur and pixelate here do rewrite the pixels, but the tool does not provide an audit log.
Does it rotate or resize the image?
No. The blur tool keeps the original dimensions. If you also want to crop to an aspect ratio, use the Aspect Ratio Cropper after you export.
Can I use the output commercially?
Yes. There are no restrictions on the processed image. Whatever rights you hold over the original, you keep over the result. No attribution required.
Your image never leaves your device
There is no upload step and no server-side handling. The image is read from local disk, blurred or pixelated inside an HTML5 canvas in your browser tab and saved back to local disk. Nothing about the file, its name or its contents reaches any server, including ours. Open the browser network tab while using the tool and confirm there are no outbound requests carrying your image. Read how we keep it private.