Generate Code 39 barcodes for inventory, healthcare, and automotive applications. Free online tool, instant SVG and PNG download. No sign-up required.
The Code 39 barcode (also known as "Code 3 of 9") is a discrete linear symbology that has been the backbone of industrial asset identification for over fifty years. It was the first symbology capable of encoding both letters and numbers.
Enter your character sequence (A-Z, 0-9). Code 39 uses a 9-element discrete architecture for high durability.
Our engine automatically frames your data with asterisk (*) sentinels, ensuring scanners identify the start and stop boundaries.
Review and download the high-resolution SVG or PNG manifest. No sign-up or watermarks required for LOGMARS compliance.
Each character is composed of 9 elements: 5 bars and 4 spaces. Exactly three of these elements are "wide," while the other six are "narrow." This binary-like pattern provides an exceptional level of physical durability for labels.
Code 39 remains the primary standard for the U.S. Department of Defense (LOGMARS) and the automotive industry (AIAG). Its simplicity and self-checking nature make it ideal for high-stakes regulatory environments and internal inventory control.
Industrial asset identifiers are high-value operational data. MyUtilityBox enforces Zero-Ingestion Encoding. All barcode transformations occur in your local V8 memory, ensuring total integrity of your part numbers.
MyUtilityBox enforces a Strict Local Execution Sandbox. All barcode generation and element mapping occur exclusively in your browser memory. We never ingest your strings.
This node has been audited for mathematical precision and memory isolation by the MyUtilityBox engineering team. All logic executes locally in browser V8 to ensure zero data leakage. Last Verified: April 2026.