Is the Invoice Numbers free to use?

Yes, the Invoice Numbers is completely free. There is no sign-up, no account required, and no limit on how often you can use it.

Does the Invoice Numbers factor in taxes or fees?

The Invoice Numbers performs the core calculation only. For final figures, you may need to add applicable taxes, fees, or charges relevant to your situation.

What devices does the Invoice Numbers work on?

The Invoice Numbers works on any device with a modern web browser — desktop, laptop, tablet, or phone. It is mobile-friendly and works offline once the page has loaded.

💼 Business

Invoice Number Generator

Generate sequential invoice numbers with custom prefix, suffix and padding. Bulk generate up to 500. Copy as CSV. Free, no sign-up.

The Invoice Numbers is a free online tool that helps you generate sequential invoice numbers with custom prefix, suffix and padding. bulk generate up to 500. copy as csv. free, no sign-up It runs in your browser with no sign-up, downloads, or installation needed. All processing happens locally — your data stays on your device.

Prefix

Suffix

Starting number

How many to generate

Number padding (digits)

Separator

Generated invoice numbers

How to use

Set your format

Choose a prefix (e.g. INV-, #, your company initials), starting number and padding. Padding ensures numbers are the same length — INV-001 through INV-999 rather than INV-1 through INV-999. Add a year suffix like -2025 to keep invoices organised by year.

Copy and use

Copy all generated numbers to paste into your invoicing software, spreadsheet or accounting system. Switch to comma or tab separator for easy CSV import. Generate up to 500 invoice numbers at once.

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