Batch Barcode Generator

Import a CSV or paste rows to generate hundreds of PNG barcodes in one go.

Bulk Generation

Default type:

Show data under barcode

Auto check digit i

Module width: i

Height: i

Quiet zone: i

Paste rows or CSV:

Accepted input: one per line (data) or with a type prefix (type,data). See “Accepted Input Formats” below.

Upload CSV:

Scale your labeling in minutes. Paste a list of product IDs or import a CSV, validate each line automatically, and export a clean ZIP of PNG barcodes ready for print or packaging. Everything runs locally in your browser for speed and privacy—ideal for retail, warehouse, library, and light manufacturing workflows.

How Bulk Generation Works

Input: Paste rows into the textarea or upload a CSV. Each row can be data or type,data. A header line (type,data) is optional.
Validation: Each row is checked against the chosen symbology rules. For EAN-13 and UPC-A, the tool can auto-append or correct the check digit.
Rendering: Barcodes are rasterized to crisp PNGs using your global settings (module width, height, quiet zone, and human-readable text).
Export: Download everything at once as a ZIP archive, or export a companion CSV with filenames and per-row status.
Privacy: Processing happens entirely in your browser—no uploads or tracking.

Accepted Input Formats

Row Format	Example	Notes
`data`	`400638133393`	Uses the default type selected above.
`type,data`	`ean13,400638133393`	Overrides the type for that row.
CSV with header	`type,data on first line`	Columns may be in any order if named type and data.

Performance Tips for Large Batches

Chunk your exports: For thousands of rows, process in smaller batches (e.g., 200–500) to keep the browser responsive.
Avoid unnecessary styles: Keep barcodes black on white and enable human-readable text only if you need it printed.
Use consistent settings: Choose module width, height, and quiet zone based on your printer and scanner tests before generating at scale.
Filename hygiene: We sanitize filenames automatically; consider adding prefixes for product groups in your source data.

Printing and Readability

Quiet zones matter: Leave clear margins around bars—3–5 mm is a common minimum.
Resolution: Aim for at least 300 DPI for label printers. PNG output here is suitable for office printers and inserts.
Contrast: Black on white yields the highest scanning reliability. Avoid colored or low-contrast backgrounds.
Spot check: Test a few codes from the batch on your actual scanners before mass printing.

Troubleshooting Batch Errors

Invalid length or characters: Ensure the data matches the chosen format. ITF is digits-only; Code 39 has a limited character set.
Check digits corrected: When auto check digit is enabled, EAN-13 or UPC-A inputs may be adjusted. The "Final value" column shows the exact encoded number.
Mixed formats: Use type,data rows or a CSV header to vary symbologies within one file.
Too small for your printer: Increase module width and height; ensure quiet zones are preserved by your label templates.

Privacy & Local Processing

This batch generator runs entirely on your device. CSV parsing, validation, and image rendering happen in your browser—nothing is uploaded.

Batch Generator – FAQ

Can I mix different barcode types?: Yes. Use rows like type,data or provide a CSV header with typeand data.
Do you support CSV separators other than commas?: Use commas for best results. If your data contains commas, wrap the field in quotes as in standard CSV.
How many barcodes can I generate at once?: Browsers handle a few hundred comfortably. For thousands, run multiple smaller batches.
Are my files uploaded?: No. Everything happens locally in your browser for speed and privacy.
Can I get vector (SVG/PDF) output?: This tool outputs PNG only. For large signage, render at a high module width or use a dedicated vector workflow.