Code 39 (with Checksum) Barcode generator
Generate easy & customizable Code 39 (with Checksum) Barcodes in seconds.
Make sure to test out your configured barcode before using it in production.
Free Code 39 (with Checksum) Barcode Generator – Create Barcodes Online
Generate Code 39 barcodes with a mandatory mod-43 check digit in seconds with TryQRCode.
Create a free Code 39 barcode with an embedded mod-43 checksum for maximum scanning reliability. Code 39 (with Checksum) uses the same 43-character alphanumeric set as standard Code 39 but always appends a mandatory mod-43 check digit that scanners verify on every read. Customize the colors, width, and height, preview it live, and download it as PNG, SVG, JPG, or WEBP. No login or technical skills required.
Generate Code 39 (with Checksum) BarcodeWhat is a Code 39 (with Checksum) Barcode?
Code 39 (with Checksum) is the standard Code 39 symbology plus a mandatory modulo-43 check digit. The digit is computed from the encoded characters and added before the stop character, which makes symbol verification a two-step process for the scanner. It keeps the familiar 43-character alphanumeric set — A–Z, 0–9, space, and - . $ / + % — so it works everywhere standard Code 39 is accepted, but with significantly stronger error detection.
In short: Code 39 (with Checksum) is standard Code 39 with a mandatory mod-43 check digit, giving every barcode an extra layer of scanning reliability.
Code 39 (with Checksum) Quick Facts
| Encodes | 43 characters: A–Z, 0–9, space, and - . $ / + % |
|---|---|
| Length | Variable (any practical length) |
| Check digit | Mandatory mod-43 check digit |
| Start/stop | Asterisk (*) character at both ends |
| Encoding standard | ISO/IEC 16388 with mod-43 check |
| Typical use | DoD logistics, healthcare, automotive, high-reliability labels |
How to Create Your Code 39 (with Checksum) Barcode
Follow these four steps to generate a professional Code 39 barcode with checksum in under a minute.
1
Enter Your Data
Type or paste your alphanumeric value — the generator computes and appends the mod-43 check digit for you.
2
Customize the Look
Adjust foreground and background colors, width scale, height, and toggle the human-readable text.
3
Generate & Preview
Your barcode renders instantly with a live preview so you can verify it before download.
4
Download & Print
Export as PNG, SVG, JPG, or WEBP and use it on labels, tags, and packaging.
No registration required. Your barcode is generated in seconds and ready for print or digital use.
Benefits of Code 39 (with Checksum) Barcodes
Why teams and businesses choose Code 39 (with Checksum) barcodes for dependable, scannable identification.
Mandatory Check Digit
Every symbol includes a mod-43 check digit that guards each read against errors.
Stronger Error Detection
The modulo-43 checksum catches misreads that plain Code 39 would accept.
Drops Right In
Uses the same character set and start/stop marks, so existing Code 39 systems still read it.
Trusted in Critical Flows
DoD logistics, healthcare labeling, and automotive supply chains rely on checked data.
Full Alphanumeric Set
Encodes A–Z, 0–9, space, and - . $ / + % — 43 characters in total.
Scans Everywhere
Read by virtually all modern laser and camera barcode scanners.
Common Use Cases for Code 39 (with Checksum)
See how Code 39 (with Checksum) barcodes are used across retail, logistics, healthcare, and manufacturing.
DoD Logistics
Checked property and supply labels where data accuracy is mandatory.
Healthcare Labeling
HIBC-style labels that benefit from a verified check digit.
Automotive (AIAG)
Part and shipping identifiers with checksum for serial verification.
Warehouse Stock
Numeric and alphanumeric stock tags that must scan correctly first time.
Asset Management
Verified asset tags for audit and tracking accuracy.
Quality Control
Inspection and routing labels with built-in data validation.
Code 39 (with Checksum) Barcode – Frequently Asked Questions
Quick answers about how the Code 39 checksum works and when to use it.
It is the standard Code 39 symbology plus a mandatory mod-43 check digit, calculated from the encoded characters and added before the stop character for extra scanning reliability.
Each character is assigned a value from 0 to 42, the values are added together, and the sum is divided by 43. The remainder becomes the check digit appended to the barcode.
Standard Code 39 does not require one, but Code 39 (with Checksum) makes the mod-43 check digit mandatory for extra reliability.
Standard Code 39 has no mandatory check digit. Code 39 (with Checksum) encodes the same 43 characters but always appends a mod-43 check digit that scanners verify.
No — like standard Code 39, it encodes uppercase A–Z, digits 0–9, space, and - . $ / + %. For lowercase or full ASCII, use Extended Code 39 instead.
Anywhere standard Code 39 is accepted but data accuracy matters most — DoD logistics, healthcare labeling, automotive supply chains, and verified asset tracking.
Create Your Free Code 39 (with Checksum) Barcode Now
Generate a scannable, print-ready Code 39 barcode with a verified mod-43 check digit in seconds—download it in any format and use it with confidence.
Generate Code 39 (with Checksum) Barcode
Free, unlimited generation with a live preview—no sign-up needed, only with TryQRCode.