Random Barcode Generator

What it does

The Random Barcode Generator produces synthetic EAN-13 and UPC-A barcode numbers with correctly calculated checksums, so they pass scanner and software validation while remaining entirely fictional. Generate up to 1,000 per run, seeded for stable fixtures, exportable as text, CSV, or JSON.

Common use cases

• Retail system testing — product lookups, label printing, and POS flows exercised with valid-format codes that match no real product.
• Inventory management — barcode columns for demo catalogs and warehouse fixtures.
• Validation testing — the check digit is real math, so your checksum verification code gets genuine positive cases (corrupt one digit yourself for the negative cases).
• Bulk fixtures — presets for single-format and bulk generation in both symbologies.

Settings

• Format — EAN-13 (13 digits, international) or UPC-A (12 digits, North America).
• How many — 1 to 1,000 barcode values.
• Seed — identical seed + settings = identical codes, so fixture files never drift.

Privacy note

Values are generated locally in your browser and never uploaded. These are synthetic numbers — not registered with GS1, not assigned to any product — for testing only. Don’t print them onto real merchandise.

FAQ

Will these scan? The numbers validate (correct check digit), so software accepts them. To scan optically you’d render them as barcode images with any barcode library — this tool supplies the correct values.

Could one collide with a real product? Possible in principle — the number space is shared with real GS1 assignments. That’s fine for test systems and exactly why you shouldn’t use them commercially.

What’s the difference between EAN-13 and UPC-A? UPC-A is the 12-digit North American standard; EAN-13 is the 13-digit international superset (a UPC-A is an EAN-13 with a leading zero). Test whichever your market scans — or both.

Need ISBNs instead? Books use ISBN — the Random ISBN generator handles those check digits.