Custom Code 128 Barcode Maker — High-Resolution PNG & SVG
What it is
A web tool that creates Code 128 barcodes you can customize and download as high-resolution PNG or scalable SVG files.
Key features
- Formats: Export as PNG (raster, configurable DPI) and SVG (vector, infinite scalability).
- Encoding: Full Code 128 support (A/B/C subsets) and automatic subset selection for numeric compression.
- Checksum: Automatic calculation and optional display of the checksum character.
- Customization: Set barcode height, module (bar) width, quiet zone, foreground/background colors, and human-readable text font/position.
- Batch generation: Upload CSV to create multiple barcodes with filenames or labels from a column.
- Output options: Transparent background PNG, margin control, filename templates, and SVG optimization for web/print.
- Validation: Input validation for unsupported characters per subset, preview to check scannability.
- Advanced: GS1-128 support (FNC1), prefix/suffix templates, leading zeros handling.
Typical use cases
- Product labels and retail packaging
- Shipping and logistics barcodes
- Inventory management and asset tagging
- Print-ready labels for thermal or laser printers
- Embedding barcodes in PDFs, websites, or packaging art
Best practices
- Use SVG for print at any size and PNG at sufficiently high DPI (300–600 DPI) for reliable scanning.
- Keep quiet zones (margin) at least 10× the narrow bar width.
- Test printed samples with target scanners; prefer Code 128C for long numeric sequences (more compact).
- Include human-readable text for manual entry; ensure contrast between bars and background.
Limitations
- Not for GS1 applications unless explicitly supporting FNC1 and GS1 formatting.
- Poorly configured module width or low DPI can make barcodes unscannable.
If you want, I can generate example parameters (size, DPI, colors) for a specific label size or produce sample SVG/PNG settings for printing.
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