SEGNO(1)

NAME
segno - Segno QR Code encoder

SYNOPSIS

segno [options] content

DESCRIPTION

segno creates QR Codes and Micro QR Codes.

It can be used to print the codes to a terminal or to serialize them in several output formats (like SVG and PNG).

COMMAND LINE OPTIONS

--ver, -V
    Shows Segno’s version and exit

-h, --help
    Show a help message which lists all commands and exit

  QR Code Options

--version VERSION, -v VERSION
    QR Code version: 1 .. 40 or Micro Code Version “M1”, “M2”, “M3”, “M4”

--error {L,M,Q,H,-}, -e {L,M,Q,H,-}
    Error correction level: “L”: 7% (default), “M”: 15%, “Q”: 25%, “H”: 30%, “-”: no error correction (used for M1 symbols)

--mode {numeric,alphanumeric,byte,kanji,hanzi}, -m {numeric,alphanumeric,byte,kanji,hanzi}
    Mode. If unspecified (default), an optimal mode is chosen for the given input.

--pattern PATTERN, -p PATTERN
    Mask pattern to use. If unspecified (default), an optimal mask pattern is used. Valid values for QR Codes: 0 .. 7 Valid values for Micro QR Codes: 0 .. 3

--encoding ENCODING
    Specifies the encoding of the provided content. If not specified (default) either ISO 8859-1 is used or if it does not fit, UTF-8 or Shift_JIS (for Kanji content) is used.

--micro
    Allow the creation of Micro QR Codes

--no-micro
    Disallow creation of Micro QR Codes (default)

--no-error-boost
    Disables the automatic error correction level incrementation. By default, the maximal error correction level is used (without changing the version).

--seq
    Creates a sequence of QR Codes (Structured Append mode). The --version or --symbol-count must be provided

--symbol-count SYMBOL_COUNT, -sc SYMBOL_COUNT
    Number of symbols to create

--border BORDER, -b BORDER
    Size of the border / quiet zone of the output. By default, the standard border (4 modules for QR Codes, 2 modules for Micro QR Codes) will be used. A value of 0 omits the border

  Output Options

--scale SCALE, -s SCALE
    Scaling factor of the output. By default, a scaling factor of 1 is used which can result into too small images. Some output formats, i.e. SVG, accept a decimal value.

--output OUTPUT, -o OUTPUT
    Output file. If not specified, the QR Code is printed to the terminal

--compact
    Indicates that the QR code should be printed to the terminal in a more compact manner.

  Module Colors

Arguments to specify the module colors. Multiple colors are supported for SVG and PNG. The module color support varies between the serialization formats. Most serializers support at least “–dark” and “–light”. Unsupported arguments are ignored.

--dark DARK
    Sets the (default) color of the dark modules. The color may be specified as web color name, i.e. “red” or as hexadecimal value, i.e. “#0033cc”. Some serializers, i.e. SVG and PNG, support alpha channels (8-digit hexadecimal value) and some support “transparent” as color value. The standard color is black

--light LIGHT
    Sets the (default) color of the light modules. The standard value is either white or transparent. See --dark for a description of allowed values.

--align-dark ALIGN_DARK
    Sets the color of the dark modules of the alignment patterns. See --dark for a description of allowed values.

--align-light ALIGN_LIGHT
    Sets the color of the light modules of the alignment patterns. See --dark for a description of allowed values.

--dark-module DARK_MODULE
    Sets the color of the dark module. See --dark for a description of allowed values.

--data-dark DATA_DARK
    Sets the color of the dark data modules. See --dark for a description of allowed values.

--data-light DATA_LIGHT
    Sets the color of the light data modules. See --dark for a description of allowed values.

--finder-dark FINDER_DARK
    Sets the color of the dark modules of the finder pattern. See --dark for a description of allowed values.

--finder-light FINDER_LIGHT
    Sets the color of the light modules of the finder pattern. See --dark for a description of allowed values.

--format-dark FORMAT_DARK
    Sets the color of the dark modules of the format information. See --dark for a description of allowed values.

--format-light FORMAT_LIGHT
    Sets the color of the light modules of the format information. See --dark for a description of allowed values.

--quiet-zone QUIET_ZONE
    Sets the color of the quiet zone (border). See --dark for a description of allowed values.

--separator SEPARATOR
    Sets the color of the separator. See --dark for a description of allowed values.

--timing-dark TIMING_DARK
    Sets the color of the dark modules of the timing pattern. See --dark for a description of allowed values.

--timing-light TIMING_LIGHT
    Sets the color of the light modules of the timing pattern. See --dark for a description of allowed values.

--version-dark VERSION_DARK
    Sets the color of the dark modules of the version information. See --dark for a description of allowed values.

--version-light VERSION_LIGHT
    Sets the color of the light modules of the version information. See --dark for a description of allowed values.

  SVG Options

--no-classes
    Omits the (default) SVG classes

--no-xmldecl
    Omits the XML declaration header

--no-namespace
    Indicates that the SVG document should have no SVG namespace declaration

--no-newline
    Indicates that the SVG document should have no trailing newline

--title TITLE
    Specifies the title of the SVG document

--desc DESC
    Specifies the description of the SVG document

--svgid SVGID
    Indicates the ID of the <svg/> element

--svgclass SVGCLASS
    Indicates the CSS class of the <svg/> element (default: ‘segno’). An empty string omits the attribute.

--lineclass LINECLASS
    Indicates the CSS class of the <path/> elements. An empty string omits the attribute.

--no-size
    Indicates that the SVG document should not have “width” and “height” attributes

--unit UNIT
    Indicates SVG coordinate system unit

--svgversion SVGVERSION
    Indicates the SVG version

--svgencoding ENCODING
    Specifies the encoding of the document

--draw-transparent
    Indicates if invisible paths should be added to the SVG document. By default all transparent paths are omitted.

  PNG Options

--dpi DPI
    Sets the DPI value of the PNG file

EXIT STATUS

segno exits 0 on success, and 1 if an error occurs.

EXAMPLES

    $ segno "Up jumped the devil"

Prints a 2-Q QR code to the terminal

    $ segno --compact "I am the walrus"

Prints a 1-L QR code to the terminal in a more compact manner

    $ segno -o=yesterday.png "Yesterday"

Saves the 1-Q QR code as PNG image.

    $ segno -o=fool.svg --title="Example QR code" "The Fool on the Hill"

Saves the 2-Q QR code as SVG document with the given title.

    $ segno -o=a-day-in-the-life.svg --scale=10 --dark darkblue "A Day in the Life"

Saves the 1-L QR code as SVG document, using a scaling factor of 10 and the dark modules use the color “darkblue” instead of black.

    $ segno -o rain.png -s 4 --dark "#003399" --micro RAIN

Saves the Micro QR Code (M2-M) as PNG image, using the color #003399 for dark modules. Each module corresponds to 4 x 4 pixels because the scaling factor was set to 4.

COPYRIGHT
2016 - 2025 Lars Heuer -- "QR Code" and "Micro QR Code" are registered trademarks of DENSO WAVE INCORPORATED.