Code 39

<\/script>\n
'; }, get iframeSnippet() { const domain = 'barcodefyi.com'; const type = 'entity'; const slug = 'code-39'; return ''; }, get activeSnippet() { return this.method === 'script' ? this.scriptSnippet : this.iframeSnippet; }, copySnippet() { navigator.clipboard.writeText(this.activeSnippet).then(() => { this.copied = true; setTimeout(() => { this.copied = false; }, 2000); }); } }" @keydown.escape.window="open = false" @click.outside="open = false">

Embed This Widget

Theme


      
    


    
    

      Widget powered by
      .
      Free, no account required.
    

  




  
The first barcode symbology capable of encoding the full alphanumeric character set (A-Z, 0-9, plus special characters). Code 39 is self-checking — each character can be verified independently — making it popular in US defense, automotive, and healthcare applications where reliability outweighs density.


  




  

    

    

      

        
Code 39

        
        1D Linear
        
      

      
      
      

        Type
        1D Linear
      

      
      

      

        Data Length
        variable (1-80 characters)
      

      
      

      

        Character Set
        A-Z, 0-9, - . $ / + % space
      

      
      

      

        Year
        1974
      

      
    

  






  



  

  




  
Related Tools

  

    
    
      
      
      
      

        
Barcode Generator

        
Generate production-ready barcodes in 20+ symbologies including EAN-13, UPC-A, Code 128, Data Matrix, and PDF417. Download as SVG or PNG …

      

    
    
    
      
      
      
      

        
Barcode Reader

        
Scan and decode barcodes using your device camera or by uploading an image. Supports all major 1D and 2D symbologies …

      

    
    
  





  




  
Related Guides

  

    
    
      
      
      
      

        
Character Encoding in Barcodes: Numeric, Alpha & Binary

        
How barcodes translate characters into patterns of bars and spaces, covering numeric-only, alphanumeric, and full ASCII/binary encoding modes.

      

    
    
    
      
      
      
      

        
Check Digit Algorithms: How Barcodes Prevent Errors

        
A practical guide to Modulo 10, Modulo 43, and Modulo 103 check digit calculations with step-by-step worked examples.

      

    
    
    
      
      
      
      

        
Fixed-Length vs Variable-Length Barcodes

        
The engineering trade-offs between fixed-length symbologies like EAN-13 and variable-length formats like Code 128.

      

    
    
    
      
      
      
      

        
Code 39 Explained: The Self-Checking Alphanumeric Barcode

        
Technical reference for Code 39 — wide/narrow encoding, the self-checking property, Full ASCII extension, and military/automotive applications.

      

    
    
    
      
      
      
      

        
HIBC Barcodes: Health Industry Bar Code Standard

        
The Health Industry Bar Code (HIBC) standard — structure, primary and secondary data formats, and when to use HIBC vs …

      

    
    
    
      
      
      
      

        
Warehouse Location Barcodes: Bin, Shelf & Zone Labeling

        
Designing a barcode-based location system for warehouses — hierarchical zone/aisle/bin numbering, label materials, and scanner-guided navigation.

      

    
    
    
      
      
      
      

        
Dock Door & Yard Management Barcodes

        
Using barcodes for dock scheduling, trailer identification, yard management, and gate check-in/check-out at distribution centers.

      

    
    
  





  




  
Related Terms

  

    
    
      Code 39
    
    
    
      Self-Checking
    
    
    
      Wide-to-Narrow Ratio
    
    
    
      Modulo 43
    
    
  





  



  



  









  
常见问题

  
  

    什么是Code 39条形码？
    
Code 39是一种可变长度字母数字条形码，编码43个字符（A–Z、0–9和7个特殊字符），无强制校验位。

  

  
  

    Code 39需要校验位吗？
    
不需要，Code 39中校验位是可选的。某些应用会添加模43校验字符以提高可靠性。

  

  
  

    Code 39在哪里使用？
    
Code 39常见于美国军事、汽车和工业应用，这些场景需要简单耐用的条形码。