This is a free web-based online barcode generator, designed for users to easily generate QR Code two-dimensional barcodes in Jpeg, Gif and Png image formats. Various parameter settings are available such as barcode size, rotation, resolution, image formats, text font etc. For more settings or barcode integrations, please refer to KeepAutomation barcode solutions, including:

Watch a quick video: how to get a free keycode and apply it?

QR Code Introduction

QR Code, also known as Denso Barcode, QRCode, Quick Response Code, is a matrix code (or two-dimensional bar code) created by Japanese corporation Denso-Wave in 1994. The "QR" is derived from "Quick Response", as the creator intended the code to allow its contents to be decoded at high speed.

KeepAutomation free online barcode generator web app will not only generate QR Code barcodes online, and also supports generating Data Matrix, generating PDF-417, generating Code 39, generating Code 128, generating GS1-128, generating EAN-13, and generating UPC-A linear and 2d barcodes online free without downloading any other software, font, toos.

QR Code Character Set Encoding

Encoding characters

• numeric data (digits 0 - 9)
• alphanumeric data (digits 0 - 9; upper case letters A -Z; nine other characters: space, $ % * + - . / : )
• byte data (default: ISO/IEC 8859-1; or other sets as otherwise defined)
• Kanji characters. Kanji characters in QR Code can be compacted into 13 bits.

Maximum encoding characters length

Maximum data characters per QR Code with Version 40-L

• numeric data: 7,089 characters
• alphanumeric data: 4,296 characters
• byte data: 2,953 characters
• Kanji data: 1,817 characters

The online QR Code generate web app will apply the above max data length rules. If your encoding QR Code data exceeds the maximum data capacity, an empty image with "Invalid Barcode Settings" message will be printed.

QR Code Data Mode

QR Code generator software will convert encoding data characters into codewords by using the following data modes.

• Numeric mode Numeric mode encodes data from the decimal digit set (0 - 9) (byte values HEX 30 to HEX 39). Normally, 3 data characters are represented by 10 bits.
• Alphanumeric mode Alphanumeric mode encodes data from a set of 45 characters.
• Byte mode In this mode, the QR Code data is encoded at 8 bits per character.
• Kanji mode The Kanji mode efficiently encodes Kanji characters in accordance with the Shift JIS system based on JIS X 0208.

Using online QR Code generator web app, you can simply choose "AUTO" data mode, and the QR Code encoder software will select the best data encoding mode for you.

QR Code Error Correction Level (ECL)

Four levels of Reed-Solomon error correction (referred to as L, M, Q and H in increasing order of data recovery capacity) allowing recovery of the QR Code barcode data.

• L: 7%
• M: 15%
• Q: 25%
• H: 30%

If you find KA.Online QR Code Barcode Generator useful,
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