Barcode Settings
Code 128 Barcode Generator
Free Online Code 128 Barcode Generator
Code 128 is a high-density barcode that can encode the full ASCII character set, making it useful for shipping labels, inventory, and general-purpose data. Unlike numeric‑only barcodes, Code 128 supports both numbers and text, making it highly versatile.
User Guide
How to use this barcode generator?
Step 1: Enter your barcode data.
Step 2: A Code 128 barcode will be generated automatically.
Step 3: Download the image.
Barcode images can be downloaded in JPG, PNG, or SVG formats.
PNG and JPG are raster image formats.
SVG is a vector format that scales to any size without losing quality.
Additional Barcode Settings
Bar Thickness (px): It sets the width of the narrowest single bar (or space) in the barcode, often referred to in industry terms as the X-Dimension or Module Width. The default value is 2 pixels wide. Increasing this number stretches the entire barcode horizontally.
Barcode Height (px): This controls the vertical height of the black bars themselves (measured in pixels). The default value is 100 px. It does not include the text underneath; it only changes how tall the vertical lines are.
Font Size: This controls the text size of the human-readable numbers/characters printed underneath the barcode. Setting this to 0 effectively hides the text completely, leaving you with just the bare barcode lines.
Text Spacing: This determines the vertical gap or spacing **between the bottom of the barcode lines and the top of the text** underneath it. Increasing this pushes the numbers further down away from the bars.
The following is a Code 128 barcode samples produced by this generator.
Date + sequential number – good for production or shipping dates.
Prefix + serial – handy for inventory tracking.
Simple alphanumeric code – ideal for product numbers.
“SN:” label plus a long serial, shows that the colon (: ) is also supported.
Includes a special character (# ) to demonstrate symbol compatibility.
All‑numeric and an even number of digits – can be encoded with Code 128‑C for higher density.
