Barcode Generator
Generate Code 128 and Code 39 barcodes from any text. Download as PNG.
How to Use This Tool
- Choose the options or parameters you want the Barcode Generator to use, such as length, character set, or quantity.
- Click the generate button and the Barcode Generator will produce a fresh result instantly.
- Copy the output to your clipboard, or click generate again for another unique result.
Common Use Cases
- Rapid prototyping: Developers and designers use the Barcode Generator to produce sample output for layouts, tests, and demos without manual creation.
- Bulk content creation: Marketers and content teams generate many variations quickly for A/B tests or template population.
- Configuration scaffolding: Engineers produce starter files or values that match a specific format spec, then customize as needed.
Frequently Asked Questions
How random is the output from the
The generator uses window.crypto.getRandomValues() where randomness matters, drawing from the OS's cryptographic RNG. For non-security uses (placeholder text, sample data), it uses Math.random(). Both produce well-distributed output for typical use cases.
What's the maximum output length?
Output size is limited only by browser memory and the input ranges you configure. Typical generators handle outputs in the tens of thousands of characters without lag. For multi-megabyte output, use a server-side tool or scripting language instead.
Can I customize the output format?
Yes. Use the controls above to set length, character set, separators, or other format-specific options. Settings persist within your browser session, so reopening the page restores your last configuration.