KEMI Tools

Photo Mosaic & Blur

Before posting marketplace photos, shipping labels, licence plates or document screenshots, drag over anything that shouldn't be seen. Choose pixelate, blur or a solid black box, set the strength, and save a copy with GPS location, capture time and camera details removed. If the original contains GPS, you'll be told right away. Everything runs in your browser — nothing is uploaded.

Drop a photo here or tap to choose

JPG, PNG, WebP — processed on this device only, never uploaded.

How to use

Drop or choose a photo. A red notice appears if it contains GPS location.
Choose pixelate, blur or black box and set the strength. Use the black box for text and numbers.
Drag on the photo to draw rectangles. Draw as many as you like, each with its own mode. Use Undo for mistakes.
Pick JPG or PNG and press Save. Share the new "-masked" file, not the original.

The location hiding in every photo: EXIF

Phone JPGs carry invisible EXIF metadata: date and time, device model, lens and exposure settings, and — if Location Services are on — the GPS coordinates of where you stood, to several decimal places. Posting an untouched photo taken in your living room can reveal your home to within metres. Some large platforms strip metadata on upload, but forums, email attachments and file-sharing links often pass the original file along. If you're not sure, strip it yourself. This tool reads the original and shows any GPS it finds; when you save, it encodes a new file from the canvas pixels, so none of the original EXIF comes along. Orientation is applied before drawing, so the result is never sideways.

What to hide before posting

Shipping labels: name, phone, address, tracking number — plus the label's barcode and QR code.
Cars: licence plates and the parking contact card on the dashboard.
Around your home: mail labels, unit numbers, door keypads, signs and buildings visible through windows.
Reflections: monitors, TVs, mirrors, windows, phone screens and glasses can mirror faces and rooms.
Documents and screenshots: ID, account and card numbers, order numbers, chat names and profile photos.

Why pixelation is risky for text

Pixelation averages colours inside fixed blocks. If blocks are smaller than the characters the shapes survive, and even with larger blocks it has been publicly demonstrated that pixelating candidate characters in the same font and comparing them can recover the original — fixed-format numbers like tracking or card numbers are especially weak. Light blur has similar issues. Use pixelation or blur for faces and backgrounds, and a solid black box for any text or numbers.

Privacy — how your photo is handled

Your photo is read and processed only in this browser's memory. Photo data, filenames and EXIF (including location) never leave your device; the GPS shown on screen is computed on your device. We log only an anonymous usage count, and closing the page discards everything.

FAQ

Is my photo really not uploaded?

Correct. The photo is opened in your browser's memory and all masking and saving happens there. No photo, filename or location is sent anywhere; we log only an anonymous usage count. The GPS coordinates shown on screen are read from the file on your device and never transmitted.

Pixelate, blur or black box?

Pixelation or blur is fine for faces and backgrounds where you only need to prevent recognition. For text and numbers — tracking numbers, phone, ID, account or card numbers — always use a solid black box. Weak pixelation or blur can leave enough shape to guess or even reconstruct the characters.

Is the location really gone from the saved file?

The tool redraws the masked result on a canvas and encodes a brand-new JPG/PNG from those pixels. The original EXIF (GPS, capture time, camera model, settings) is not copied. Information visible in the picture itself — signs, the view from a window, mail — still has to be covered by you.

What happens to the original?

It's never modified. The masked result is saved as a new file ending in "-masked"; make sure you share that one, not the original from your gallery.

I drew an area by mistake.

Undo removes areas one by one, and Clear all starts over. Moving the strength slider also updates the area you just drew so you can compare instantly.