What is Code 128 Barcode?
Code 128 is a high-density linear barcode that can encode all 128 ASCII characters, including uppercase and lowercase letters, numbers, and special characters. It's one of the most efficient linear barcode standards, offering high data density and excellent error detection. Code 128 automatically selects the most efficient encoding (A, B, or C) based on your data, making it ideal for shipping labels, packaging, and inventory management.
Why Use Code 128 Barcodes?
High Density
Code 128 offers the highest data density among linear barcodes, allowing more information in less space.
Full ASCII Support
Encodes all 128 ASCII characters including uppercase, lowercase, numbers, and special characters.
Built-in Checksum
Includes mandatory checksum digit for error detection, ensuring high scanning accuracy.
Shipping Standard
Widely used in shipping and logistics (GS1-128), making it perfect for supply chain applications.
How to Use Code 128 Barcodes
- Enter Your Data: Type any text, numbers, or special characters. Code 128 automatically selects the best encoding variant (A, B, or C) for optimal density.
- Customize Design: Adjust width scale, height, colors, and enable text display to match your labeling requirements.
- Test Scanning: Preview and test your barcode with a scanner to ensure it reads correctly before printing.
- Download & Print: Download in SVG, PNG, JPG, or WEBP format. Print at 300+ DPI for best scanning results.
Frequently Asked Questions
Code 128 automatically selects the best variant. Code 128A encodes uppercase letters and control characters. Code 128B encodes uppercase, lowercase, and special characters. Code 128C encodes numeric data only with double density (2 digits per character). Use Code 128 for automatic optimization, or specific variants for fixed formats.
GS1-128 (formerly EAN-128) is Code 128 with GS1 Application Identifiers. It's the standard for shipping labels and supply chain applications, encoding product information, batch numbers, expiration dates, and more in a structured format.
Yes! Code 128 (and Code 128B) can encode both uppercase and lowercase letters, as well as all ASCII characters. This makes it more versatile than Code 39 which only supports uppercase.
Code 128 is used in shipping and logistics (GS1-128), healthcare, manufacturing, retail, warehousing, inventory management, asset tracking, and any application requiring high data density and full character support.
Code 128 offers higher density, full ASCII support, and mandatory checksum, making it more efficient. However, Code 39 is simpler and more universally recognized. Choose Code 128 for high-density needs, Code 39 for maximum compatibility.
Code 128 has no fixed maximum length, but practical limits depend on scanner capabilities and print space. For best results, keep barcodes under 80 characters. Code 128C can encode numeric data very efficiently (2 digits per character).
Absolutely! Code 128 (specifically GS1-128) is the standard for shipping labels worldwide. It's used by major shipping carriers and logistics companies for package tracking and identification.
Yes, Code 128 includes a mandatory checksum digit that's automatically calculated and added. This ensures data integrity and helps prevent scanning errors.
Yes! Code 128 is excellent for inventory management due to its high density and full character support. It can encode product codes, serial numbers, batch numbers, and other detailed information efficiently.
Yes! If you're logged in, you can edit saved Code 128 barcodes and update the encoded data, colors, size, or other settings. The barcode will be regenerated with the new information.
