Serial number generator.
Unique, in bulk, free.

A serial number is a unique code given to one individual item, so it can be told apart from every other unit of the same product. Two identical blenders share a model number and a GTIN, but each has its own serial number.

Choose sequential or random numbering, add a prefix such as a product code, set the length and how many you need, then press Generate. Download the list as CSV and send it to your printer or packaging supplier. Everything runs in your browser and nothing is stored.

Sequential serials are easy to sort and tell you roughly when an item was made. Random serials can’t be guessed, so nobody can invent a valid one by changing a digit. Use random serials when the number unlocks something, such as warranty registration or a claim.

Yes, every serial in a batch is different. The tool can’t see serials you created earlier, so give each batch something of its own, such as a date, batch code or a different start number, and keep a record of what you’ve issued.

One extra character at the end, calculated from the rest of the serial. If someone mistypes a character or swaps two neighbors, the check no longer matches, so a form can reject the typo. Use the Luhn check digit for all-digit serials and the ISO 7064 MOD 37,36 check character when serials contain letters.

Avoid characters that look alike on a printed label: 0 and O, 1 and I. Customers typing a serial from a sticker mix them up all the time. Spaces and symbols also cause problems in forms and systems, so stick to letters, digits and hyphens.

In GS1 barcodes and GS1 Digital Link, the serial number (Application Identifier 21) can be up to 20 characters. Letters, digits and a small set of symbols such as hyphens are allowed. Add your GTIN in the tool and it keeps serials within that limit and builds a Digital Link for each one.

No. The serials are generated in your browser and never sent to Veribl. Download the CSV and keep it as your record.