Blur QR / Barcode

Detect a QR code or barcode in a photo and cover it with solid black before sharing the image.

Redaction & masking Client-side jsQR + ZXing, Canvas fill

Tool preview

How to use it

! Only the first detected code is covered; images with several codes need one pass per code.
! A 1D barcode only reports two points, so the covered band is estimated from the symbol width — check the preview.
! Heavily distorted or partially cropped codes may not be detected.

Does it handle barcodes as well as QR codes?

Yes. QR codes are covered by their exact corner points; barcodes by an estimated band across the symbol.

Does it blur or black out?

Solid black, because blur can sometimes be reversed by a determined reader.

Is the image uploaded?

No, detection and painting happen locally.

Processing happens in your browser using the File API, WebAssembly and Web Workers. There is no upload endpoint.

Add a use-case, date and recipient watermark to an ID document.

Stamp a purpose and date watermark onto a photocopy.

Lay both sides onto one A4 page, ready to print.