What format can I create?

You can combine a text prefix (INV, BILL, etc.), an optional date segment (YYYYMMDD, YYYYMM, or YYYY), and a zero-padded sequential counter. A separator (- _ / or none) is placed between each part. For example: INV-20260821-0001.

What is the date in the invoice number based on?

Today's date at the time you open the page. If you need a different date, you can manually type the date into the prefix field as part of the prefix text.

Can I generate non-sequential numbers?

This tool generates a consecutive sequence starting from your chosen start number. For non-sequential IDs, combine this with the Random Number Generator.

Is anything sent to a server?

No. All generation is pure client-side JavaScript — nothing is uploaded or transmitted.

INVOICE NUMBER GENERATOR

Create sequential invoice numbers with a custom prefix, date, separator, and counter. Preview and copy results in one click.

Prefix

Separator

Date segment

Number digits: 4

Starting number

Count

Preview

INV-20260824-0001

How to generate invoice numbers

1
Set a prefix (e.g. INV, BILL) and choose a separator (hyphen, underscore, slash, or none).
2
Pick whether to include a date segment — full date, year+month, year only, or no date.
3
Choose the number of digits for the counter and a starting number.
4
Set the count and click Generate. Copy individual numbers or use Copy all to export the full list.

Questions

What format can I create?: You can combine a text prefix (INV, BILL, etc.), an optional date segment (YYYYMMDD, YYYYMM, or YYYY), and a zero-padded sequential counter. A separator (- _ / or none) is placed between each part. For example: INV-20260821-0001.
What is the date in the invoice number based on?: Today's date at the time you open the page. If you need a different date, you can manually type the date into the prefix field as part of the prefix text.
Can I generate non-sequential numbers?: This tool generates a consecutive sequence starting from your chosen start number. For non-sequential IDs, combine this with the Random Number Generator.
Is anything sent to a server?: No. All generation is pure client-side JavaScript — nothing is uploaded or transmitted.