Code 39 Extended Barcode Generator
The extended variant of Code 39 encodes the full ASCII set using character sequences.
Data length
可变长度
Character set
完整 ASCII
Check digit
模 43（可选）
Typical uses
Industrial use needing full ASCII
Select barcode format
Press Tab after a value to add custom display text, or paste two columns (value, caption) straight from Excel.
Output
1 item(s)
Code 39 Extended · Letters, digits and common symbols
Options
Foreground
Background
Barcode image API
/api/barcode/code39ext/Abc-123%2B
The endpoint returns an SVG vector image usable directly in <img> tags.