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Code 39 Generator
Create Code 39 barcodes online for free – robust and widely used in industry and administration.
Open the generator →What is a Code 39 barcode?
Code 39 is a well-established 1D barcode for uppercase letters, digits and a few symbols. It is especially easy to print and very fault-tolerant.
Common in industry, administration and asset tagging where robustness matters more than maximum density.
Technical details
- Category
- 1D linear barcode
- Data & character set
- A–Z, 0–9 and - . $ / + % plus space
- Capacity
- variable length
- Check / error correction
- optional Modulo-43 check digit
- Norm / standard
- ISO/IEC 16388
- Size & printing
- needs more space than Code 128
- Good to know
- Very fault-tolerant and easy to print – needs no check character, ideal for workshops and administration.
Compared to related codes
| Code | Category | Data & character set |
|---|---|---|
| Code 39 barcode | 1D linear barcode | A–Z, 0–9 and - . $ / + % plus space |
| Code 128 barcode | 1D linear barcode | full ASCII set (128 characters: digits, upper/lowercase, symbols) |
| GS1-128 barcode | 1D linear barcode (logistics) | ASCII with standardized data identifiers (GS1 Application Identifiers) |
| ITF barcode | 1D linear barcode (numeric) | digits only, always an even count |
This helps you pick the right code type for your use case faster.
How to create a Code 39 barcode
- The type “Code 39 barcode” is preselected – you can change it anytime in the generator.
- Enter your value (example: CODE39).
- Adjust colors, module size and the quiet zone and check the live preview.
- Download the Code 39 barcode as PNG, SVG or PDF, or print an A4 label sheet.
Use cases
- Industry
- Administration and IDs
- Warehouse labelling
Tips for clean printing & scanning
- Keep contrast high and avoid scaling that merges thin bars.
- Give the code enough quiet zone and print at 300 dpi or more.
- For long data Code 128 is denser; Code 39 is more robust with basic printers.
Features
- Free and no sign-up
- Instant live preview
- Export as PNG, SVG and PDF
- Customizable colors, size and caption
- Batch generation & A4 label printing
- Works on desktop and mobile
FAQ
- How do I create a Code 39 barcode?
- Choose the type, enter your value (e.g. CODE39), adjust the design and download the Code 39 barcode as PNG, SVG or PDF.
- What is a Code 39 barcode used for?
- Typical use cases are Industry, Administration and IDs, Warehouse labelling.
- What is an example value for a Code 39 barcode?
- A valid example is “CODE39”. Just enter your own value and the Code 39 barcode is generated instantly in the preview.
- Is the Code 39 Generator free?
- Yes. Barcode Studio is completely free and requires no sign-up.
- Which download formats are available?
- You can export as PNG, SVG or PDF and print directly.
- Does it work on mobile?
- Yes, Barcode Studio runs in any modern browser on desktop and mobile.
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