Barcode will not scan
increase size and quiet zone, restore high contrast and test without decorative colors.
Barcode Generator
Create one barcode or a batch from line-separated values, with symbology-specific validation before PNG or ZIP export.
QR, Barcode & SEODirect answer
A barcode generator converts text or digits into a machine-readable symbol using a selected symbology. AppKiro exposes Micro QR, Data Matrix, Aztec, PDF417, Code 128, Code 39, EAN-13 and UPC-A with size, padding and color controls; input rules and capacity vary by format.
Letters, numbers, and symbols
Enter content to generate Data Matrix
300px
2
About Data Matrix
Invented by: International Data Matrix Inc. (RVSI Acuity CiMatrix)
Year: 1987
Used extensively in electronics, healthcare, and logistics. Can encode up to 2,335 alphanumeric characters.
How to use it
Enter the source data: Choose the barcode type, then enter one value or one value per line for batch mode. Follow the visible character and digit rules for that symbology.
Choose the relevant settings: Set dimensions, padding/quiet zone and colors. Keep dark modules on a light background and avoid reducing margins below the format’s practical requirements.
Review and verify the result: Generate and scan-test the result. Download one PNG or the batch ZIP only after invalid rows are reported clearly.
Key capabilities
- Supports eight listed 1D/2D symbologies.
- Single-value and line-based batch generation.
- Editable size, padding and foreground/background colors.
- PNG export for individual symbols.
- ZIP export for successfully generated batch items.
Best use cases
- Create internal inventory or test labels.
- Generate EAN/UPC samples after validating digit rules.
- Build Data Matrix, PDF417 or Aztec fixtures for scanner testing.
Limits and safety notes
- Each barcode family has different data, length, check-digit, density and printing requirements. EAN-13 accepts 12 digits for check-digit generation or 13 with a valid check digit only if that behavior is confirmed in the implementation. Regulatory retail use may require officially assigned identifiers.
- The core transformation runs in the current browser component. Browser extensions, clipboard history, downloaded files and site-wide diagnostics remain separate exposure points, so never enter production secrets unless you have reviewed the complete environment.
Troubleshooting
EAN/UPC input is rejected
verify digit count and check-digit behavior for the selected type.
Batch ZIP misses rows
show an itemized error list and never silently omit failed values.
Frequently asked questions
Which barcode type should I use?
Use the format required by your scanner or business workflow. Code 128 is flexible for general alphanumeric data; EAN/UPC are retail-oriented numeric formats; Data Matrix, Aztec and PDF417 serve different 2D use cases.
Can I generate barcodes in bulk?
Batch mode processes up to 200 non-empty lines and reports invalid rows. ZIP generation streams entries and releases each temporary data URL after it is added, which avoids retaining a second full set of generated images in component state.
Why does a generated barcode fail to scan?
Common causes are low contrast, insufficient quiet zone, dimensions that are too small, unsupported input or printing distortion. Test the exact exported or printed symbol with the target scanner.
Is it safe and private?
The calculation runs in this browser component, but that alone is not a complete privacy guarantee. Use non-production data unless you have also reviewed extensions, clipboard history, downloads and site diagnostics.
Does it work on mobile?
The layout adapts to narrow screens. File selection, camera access, clipboard actions and downloads still depend on the permissions and capabilities of the mobile browser.
Related tools
Use the tool
Select the required symbology, validate the data and scan-test the exported image in its real use environment.