Create Code 39 barcodes for legacy systems

Create Code 39 barcode artwork for simple alphanumeric labels.

Create your barcode

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Barcode formatA simple alphanumeric barcode often used for asset and inventory labels.

Value

Scale

Height

Bar color

Background

Show human-readable text

This tool creates barcode artwork. It does not issue official UPC, EAN, GTIN, ISBN or GS1 numbers.

Print barcodes at a size your scanner can read and keep a clear quiet zone around the symbol.

When Code 39 still fits

Code 39 is older and less dense than Code 128, but it is still useful in warehouses, labs, libraries, and equipment labels where scanners and internal systems already expect it.

Create a Code 39 barcode

Enter the alphanumeric value your system expects.
Keep the value short because Code 39 uses more space than Code 128.
Generate the barcode and check whether the label still fits your physical space.
Download SVG or PNG depending on your label workflow.
Scan a printed sample with the scanner used in the actual environment.

Where Code 39 works

Legacy asset tags
Library and lab labels
Equipment IDs with short values

Code 39 label checks

Use Code 39 when your existing system or scanner requires it.
For dense labels with longer values, Code 128 may be a better choice.
Keep human-readable text visible for library, lab, and equipment labels.

Code 39 mistakes to avoid

Choosing Code 39 for long values that would fit better in Code 128.
Using lowercase or unsupported characters when the scanner workflow expects classic Code 39.
Printing narrow labels without checking whether the wider Code 39 symbol still fits.

Code 39 barcode questions

When should I use Code 39?

Use it for legacy systems, asset labels, libraries, labs, and workflows where Code 39 is already required.

Is Code 39 good for long values?

Usually no. Code 39 can become wide quickly. Code 128 is often better for longer internal values.

Can Code 39 include letters?

Yes. It supports uppercase letters, digits, and a limited set of symbols.

Do I need to type the start and stop asterisks?

Usually no. The barcode generator handles the Code 39 start and stop pattern for the artwork. Enter the value your system expects people or scanners to read.

What characters can Code 39 encode?

Standard Code 39 supports uppercase A through Z, digits 0 through 9, and a few symbols: space, dash, period, dollar sign, slash, plus, and percent. It does not support lowercase letters unless you use Extended (Full ASCII) Code 39.

Why do some older systems still require Code 39?

Code 39 was one of the first alphanumeric barcode formats and became deeply embedded in government, military, and legacy industrial systems. Replacing it would mean updating scanners, software, and training, so many organizations keep using it.

Does Code 39 have a check digit?

A check digit is optional in Code 39, not mandatory like in Code 128. Some systems require it and some do not, so check your workflow specifications before generating the barcode.

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When Code 39 still fits

Code 39 is older and less dense than Code 128, but it is still useful in warehouses, labs, libraries, and equipment labels where scanners and internal systems already expect it.

Create a Code 39 barcode

Enter the alphanumeric value your system expects.

Keep the value short because Code 39 uses more space than Code 128.

Generate the barcode and check whether the label still fits your physical space.

Download SVG or PNG depending on your label workflow.

Scan a printed sample with the scanner used in the actual environment.

Code 39 label checks

Use Code 39 when your existing system or scanner requires it.
For dense labels with longer values, Code 128 may be a better choice.
Keep human-readable text visible for library, lab, and equipment labels.

Code 39 mistakes to avoid

Choosing Code 39 for long values that would fit better in Code 128.
Using lowercase or unsupported characters when the scanner workflow expects classic Code 39.
Printing narrow labels without checking whether the wider Code 39 symbol still fits.

Code 39 barcode questions

When should I use Code 39?

Use it for legacy systems, asset labels, libraries, labs, and workflows where Code 39 is already required.

Is Code 39 good for long values?

Usually no. Code 39 can become wide quickly. Code 128 is often better for longer internal values.

Can Code 39 include letters?

Yes. It supports uppercase letters, digits, and a limited set of symbols.

Do I need to type the start and stop asterisks?

Usually no. The barcode generator handles the Code 39 start and stop pattern for the artwork. Enter the value your system expects people or scanners to read.

What characters can Code 39 encode?

Why do some older systems still require Code 39?

Does Code 39 have a check digit?

A check digit is optional in Code 39, not mandatory like in Code 128. Some systems require it and some do not, so check your workflow specifications before generating the barcode.

Create Code 39 barcodes for legacy systems

Create your barcode

When Code 39 still fits

Create a Code 39 barcode

Where Code 39 works

Code 39 label checks

Code 39 mistakes to avoid

Code 39 barcode questions

When should I use Code 39?

Is Code 39 good for long values?

Can Code 39 include letters?

Do I need to type the start and stop asterisks?

What characters can Code 39 encode?

Why do some older systems still require Code 39?

Does Code 39 have a check digit?

Related inventory barcode tools

More tools for internal labels

Free Barcode Generator

Code 128 Barcode Generator

Barcode Scanner Online

QR Code Label Generator

Create Code 39 barcodes for legacy systems

Create your barcode

When Code 39 still fits

Create a Code 39 barcode

Where Code 39 works

Code 39 label checks

Code 39 mistakes to avoid

Code 39 barcode questions

When should I use Code 39?

Is Code 39 good for long values?

Can Code 39 include letters?

Do I need to type the start and stop asterisks?

What characters can Code 39 encode?

Why do some older systems still require Code 39?

Does Code 39 have a check digit?

Related inventory barcode tools

More tools for internal labels

Free Barcode Generator

Code 128 Barcode Generator

Barcode Scanner Online

QR Code Label Generator