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Invoice Number Generator

Generate sequential invoice numbers with custom prefix, year format, separator, and zero-padding. Copy individual numbers or all at once. No signup required.

FreeNo SignupNo Server UploadsZero Tracking
Format Configuration
Year Format
Separator
Generation Options

Preview

INV-2026-0001

Configure your format and click "Generate" to see invoice numbers here.

How to Use Invoice Number Generator

  1. 1

    Set your prefix

    Enter a prefix like 'INV', 'BILL', or your company initials. Leave empty for numbers only.

  2. 2

    Choose a year format

    Select YYYY for full year (2026), YY for short year (26), or no year to exclude it entirely.

  3. 3

    Pick a separator and padding

    Choose a separator character (-, /, .) and set how many digits to pad the sequential number to.

  4. 4

    Generate numbers

    Set the start number and count, then click 'Generate' to create a batch of sequential invoice numbers.

  5. 5

    Copy the results

    Click 'Copy All' to copy every number to your clipboard, or hover over individual numbers and click 'Copy'.

Frequently Asked Questions

A good format includes a prefix (like INV), the year, and a zero-padded sequential number. For example: INV-2026-0001. This keeps numbers unique, sortable, and professional.

Zero-padding ensures all numbers have the same length, which makes them sort correctly in spreadsheets and accounting software. INV-0001 sorts better than INV-1.

Yes. Set the 'Generate Count' field to any number up to 100 to generate a batch of sequential invoice numbers.

No. Everything runs in your browser. No data is sent to any server.