# MSI Plessey Barcode Generator

Generate an MSI Plessey barcode from digits for retail shelf labels, warehouse bins and inventory tags. Choose a modulo 10, modulo 1010, modulo 11 or modulo 1110 check digit, or none, and the tool calculates it, prints it in the human readable text and draws the barcode as a PNG image or an SVG file. Scale, bar height and text are adjustable to match your labels.

## Frequently asked questions

### What can I encode with MSI Plessey?

Digits only, up to 40 in this tool. Spaces and hyphens are removed, and letters or other symbols are rejected with a message.

### Which check digit methods are available?

Modulo 10, modulo 1010 (two modulo 10 digits), modulo 11, and modulo 1110 (a modulo 11 digit followed by a modulo 10 digit), or none. Modulo 10 is the default and the most common. Choose the method your scanner or system expects.

### Is the check digit printed?

Yes. When a check method is selected the calculated digits are appended to the data and shown in the human readable text, so the printed number matches what the scanner transmits.

### What happens if I choose no check digit?

The digits are encoded as entered. MSI Plessey is not self checking, so a check digit is strongly recommended to protect against misreads.

### Can I download the MSI Plessey barcode as a vector file?

Yes. Choose SVG for a vector file that stays sharp at any size in print and design software, or PNG for a raster image that works in documents, web pages and label printers. Both come with a white background and a white margin.

### What do the scale and height settings do?

The scale from 1 to 10, default 3, multiplies the width of every bar and space. The bar height accepts 5 to 50 millimeters and defaults to about 25 millimeters.

### Can I hide the printed digits?

Yes. Turn off the human readable text option to draw only the bars.

### Where is MSI Plessey used?

It remains common on supermarket shelf edge labels and in warehouse location labels, where it was introduced decades ago. New projects usually choose Code 128 instead.

### Why does my scanner not read the barcode?

Many scanners ship with MSI Plessey disabled. Enable it in the scanner settings and set the same check digit method as in this tool.

### Is my data stored?

No. The digits are used only to draw the image, which may be at most 4000 pixels on a side.

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