Multiple Barcode Check Digit Generator

Separate values with a new line and/or a comma.

How to Calculate Check Digits

This Multiple Barcode Generator will calculate and add confirmed check digits to your incomplete barcode. Remove the last digit of your GTIN-8, GTIN-12, GTIN-13 and/or GTIN-14 barcodes, leaving you with 7 digit, 11 digit, 12 digit and 13 digit barcode pieces. Paste the pieces in the first (the left) input box and hit the button “Calculate”. The calculator will append the final check digit to your barcode piece or append an error message if you have entered an invalid piece.

The multiple barcode calculator has been verified to work with up to 1 million lines per call. If you need more lines than 1 million you can do so as well, but at your own risk. Calculating ~ more than 10 million lines can freeze up your browser for a short time, and you will need to disregard any messages from your browser that it has frozen. Typically the browser will ask you if you wish to force it to close, which you can safely ignore. Be patient and let the calculator generate the barcode check digits for you.

How to Validate Check Digits

This bulk barcode validator will confirm if your barcode is a valid GTIN-8, GTIN-12, GTIN-13 and/or GTIN-14 barcode. Paste your barcodes in the first (the left) text box and click the button “Validate”. If your barcode is valid according to GS1 standards, it will be appended with a “, GTIN-XX OK” message. If it is invalid it will be appended with the message “, invalid x”.

The bulk GTIN/EAN/UPC barcode validator is confirmed to handle well above 1 million lines per call. Please use with precaution if sending very large numbers of barcodes.

Supported barcode standards

This is a bulk EAN, UPC and GTIN check digit calculator and validator that will calculate and validate check digits in bulk for the following valid types of barcode standards:

  • 12, 13 & 14 digit barcodes
  • UPC, EAN, GTIN, ITF, SCC & UTC barcodes.

12 digit barcodes

An UPC Barcode and code

  • UPC-A
  • GTIN-12

13 Digit Barcodes

An EAN Barcode and code

  • EAN-13
  • GTIN-13

14 Digit Barcodes

A GTIN-14 Barcode and code

  • GTIN-14
  • UCC-14
  • ITF-14
  • SCC-14

Multiple Barcode Generator: Instructions

Paste your barcode or a list of your barcodes into the input field below and then click the Check Digit button. You must enter the barcode without the check digit – for example for the 12 digit standard UPC-A, enter 11 digits.

This multiple barcode tool can process multiple different barcodes simultaneously. The tool will generate all check digits and display the complete codes in the output field – in the same order that you entered the incomplete codes.

About Barcodes

A bar code or more commonly barcode is the small image of bars or lines and spaces that is seen on retail items and products.

A barcode is used to identify a particular product number, person, or location. The code uses a sequence of vertical bars and spaces to represent numbers and symbols.

A bar code symbol typically consists of five parts: a quiet (or empty) zone, a start character, data characters, a stop character and finally another quiet zone.

About EAN Codes

EAN is an abbreviation of European Article Numbers and is also known as International Article Numbers. EAN and UPC are exactly the same apart from the visible placement of the numbers, which are printed below the acrual barcode of the EAN/UPC.

About UPC Codes

UPC is an abbreviation of Universal Product Code. An UPC Code consists of a unique 12-digit number and a barcode above it. In the most common application of a product UPC the first six numbers indicate the manufacturer. The next five digits are an item number, and the final number is the check digit. The check digit is added to help ensure that the UPC is valid.