Barcode Generator — EAN, UPC, Code 128 and More

A barcode represents data as a pattern of bars and spaces. This generator supports EAN-13 (JAN), EAN-8, UPC-A, Code 128, Code 39, ITF-14 and Codabar (NW-7). Choose a format, enter your value, then download a PNG or SVG image.

Generation runs in your browser. You can change the bar width, height, colors and human-readable text. PNG exports use twice the preview dimensions; SVG preserves vector shapes. Neither option guarantees a particular physical size or print quality.

The example values illustrate the input format. They are not numbers allocated to you for use on products. Generating a barcode image does not assign a GTIN, register it with GS1 or establish a right to use the number.

• EAN-13: encodes a 13-digit GTIN-13. Enter 12 digits to add the check digit, or 13 digits to validate it. Japan's standard JAN symbol uses this format.
• EAN-8: encodes a separately allocated 8-digit GTIN-8 for small products. Enter 7 or 8 digits. Do not obtain it by shortening a GTIN-13. For use in Japan, consult GS1 Japan's GTIN-8 allocation procedure.
• UPC-A: encodes a 12-digit GTIN-12, commonly used in North American retail. Enter 11 or 12 digits. Prefixing a GTIN-12 with zero gives the equivalent 13-digit representation; it does not allocate a new number.
• Code 128: accepts up to 80 printable ASCII characters, including spaces. Line breaks, non-ASCII letters and emoji are not accepted. This tool does not add the FNC1 or application identifiers needed for GS1-128.
• Code 39: accepts up to 43 characters: uppercase A–Z, digits, spaces and - . $ / + %. This tool does not automatically append or validate the optional Mod 43 check character. Match the scanner's configuration to your data.
• ITF-14: encodes a 14-digit GTIN. Enter 13 or 14 digits. The image does not include bearer bars and is not a finished packaging-print file. Check the applicable GS1 dimensions, bearer bars and print quality requirements.
• Codabar (NW-7): accepts digits and - $ : / . + between uppercase A–D start and stop characters, for example A12345B. The 80-character limit includes these two characters. At least one data character is required.

The last digit of a GTIN helps detect errors. For an EAN-13 payload of 12 digits, multiply alternating digits from the left by 1 and 3, add the results, and take the difference to the next multiple of ten. If the sum is already a multiple of ten, the check digit is zero.

For example, the payload 490123456789 has a weighted sum of 146, so its check digit is 4 and the complete value is 4901234567894. This is a calculation example, not an allocation of that number.

This tool adds the digit only when you enter a payload of the correct length. If you enter a complete value with an incorrect check digit, it reports the expected digit instead of silently changing your input. A valid check digit cannot establish the product's identity, ownership or GS1 allocation.

Keep the blank quiet zones around the symbol. Use black bars on a white background where possible. The tool requires darker bars and an on-screen RGB contrast ratio of at least 4.5:1; this is a basic screen check, not barcode print verification.

Red, orange, pink and pale yellow bars may be difficult for red-light scanners to detect. Avoid these colors for bars. Test the actual printed size, material and scanner. A readable preview or a successful download does not prove compliance with a retailer's or logistics provider's requirements.