Resize or Scale QR Codes

Resizing or Scaling QR Code

To generate a QR Code with customize sized image, please refer to the following steps:

  1. Select the Type
  2. Input the QR Code content data
  3. Use the size slider to set the size of the image under settings section
  4. Click Generate Preview button

You will see the generated QR Code of your customize sized image under preview section.



 GET /qrcodegen/api/qrcode/generate?data=<URL>&foreColor=&bgColor=&ecc=&size=150x150&format=



Java Script

The addRequestSettings function is used to add customize QR Code settings in the API request parameters. 

  addRequestSettings : function(requestString){

 requestString = requestString + "&ecc=" + this.$('.errorCorrectionCode option:selected').text();

 requestString = requestString + "&foreColor=" + encodeURIComponent(this.$('.input-fcolor').val());

 requestString = requestString + "&bgColor=" + encodeURIComponent(this.$('.input-bgcolor').val());

 if(this.$('.input-size').val() != "100x100")

 requestString = requestString + "&size=" + this.$('.input-size').val();

 return requestString;



Core API Method - QRCodeManagementController.generateQRCode 

 @RequestMapping(value = "generate", method = RequestMethod.GET,

    		produces = {MediaType.IMAGE_JPEG_VALUE, MediaType.IMAGE_PNG_VALUE, MediaType.IMAGE_GIF_VALUE, MediaType_IMAGE_TIFF_VALUE, MediaType_IMAGE_BMP_VALUE})

    @ApiOperation(value = "Generate QR Code.")

    public ResponseEntity<byte[]>  generateQRCode(

    		@ApiParam( value = "data", name="data" , required = true)

    		@RequestParam("data") String data,

        HttpServletRequest request,HttpServletResponse response,

        @ApiParam( value = "A user-chosen password that can be used with password-based encryption (PBE) Algo PBEWITHMD5AND128BITAES-CBC-OPENSSL)", name="passKey", required=false) @RequestParam(required=false, value="passKey") String passKey,

        @ApiParam( value = "ForeColor e.g #000000 (Black - RGB(hex))", name="foreColor", required=false) @RequestParam(required=false, value="foreColor") String foreColor,

        @ApiParam( value = "BackgroundColor e.g #FFFFFF (White - RGB(hex))", name="bgColor", required=false) @RequestParam(required=false, value="bgColor") String bgColor,

        @ApiParam( value = "L|M|Q|H - Reed-Solomon error correctionCode Level(from low to high) default=Low", name="ecc", required=false) @RequestParam(required=false, value="ecc") String ecc,

        @ApiParam( value = "Image Size e.g #150x150", name="size", required=false) @RequestParam(required=false, value="size") String size,

        @ApiParam( value = "jpeg|tiff|gif|png|bmp - default=png", name="format", required=false) @RequestParam(required=false, value="format") String format,

        @ApiParam( value = "true|false default=false", name="download", required=false) @RequestParam(required=false, value="download") boolean download,

        @ApiIgnore @Value("#{request.getHeader('" +  ACCEPT_HEADER + "')}") String acceptHeaderValue) throws Exception {

Resizing or Scaling Code Spinet - QRCodeManagementController.generateQRCode

 	        // Set graphics unit


		// Set margins


		builder.setForeColor(getColorValue(foreColor, "#000000"));

		builder.setBackColor(getColorValue(bgColor, "#FFFFFF"));

		logger.debug("builder.getGraphicsUnit() ::" + builder.getGraphicsUnit());

		// Get BufferedImage with exact bar code only

		BufferedImage img = builder.getOnlyBarCodeImage();

		logger.debug("img.getWidth() : :" + img.getWidth());

		logger.debug("img.getHeight() :: " + img.getHeight());

		if(imageDimention.getWidth() < img.getWidth())

		   imageDimention.width = img.getWidth();

		if(imageDimention.getHeight() < img.getHeight())

		 	imageDimention.height = img.getHeight();

	        BufferedImage img2 = builder.getCustomSizeBarCodeImage(imageDimention, true);

   	        MediaType responseType = responseImageTypeDto.getMediaType();

	        ImageIO.write(img2, responseType.getSubtype(), baos);


		imageInByte = baos.toByteArray();