Invoice Number Generator - Sequential Invoice IDs

Generate sequential invoice numbers with custom prefix, date formats, and auto-increment. Track next number, preview format, copy values. Works offline.

Invoice Number Preview

INV-001

Next invoice number

Format Settings

Prefix Optional prefix before the number

Date Format

Separator

Counter Padding

Current Counter Will auto-increment after each generation

How many to generate?

Generated Invoice Numbers (0)

No invoice numbers generated yet

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Frequently Asked Questions

Fully customizable: custom prefix (INV, BILL, etc.), date-based patterns (YYYYMMDD, YYYY-MM, etc.), sequential counters with padding (001, 0001), separators (dash, slash, underscore, none), and combinations.

The counter automatically increments each time you generate. Your current number is saved in browser localStorage, so it persists between sessions and continues from where you left off.

Yes. Choose from multiple date formats: YYYYMMDD (20250315), YYYY-MM (2025-03), YYMMDD (250315), or no date. Date is automatically set to today or can be customized.

Padding adds leading zeros to maintain consistent length. For example, with padding 4, numbers appear as 0001, 0002, 0099, 0100. This keeps invoice numbers aligned and professional.

Yes. Click 'Reset Counter to 1' to restart numbering from 1. Useful when starting a new fiscal year, changing formats, or testing.

Yes. The current counter value is saved in browser localStorage. Close and reopen the browser, and your counter continues from the last value. Clear browser data to reset.

Common patterns: sequential (INV-001), date-sequential (2025-03-001), year-sequential (2025-0001), client-sequential (CLIENT-001), or fiscal-year-sequential (FY25-001).

Yes. The preview shows your next invoice number in real-time as you change settings. This helps verify the format before generating.

Click the copy button next to any generated invoice number, or click 'Copy All' to copy the entire list. Numbers are copied in plain text, ready to paste into invoices or spreadsheets.

Manually adjust the counter value in settings to move backward or forward. For example, if you accidentally generated 3 numbers, decrease the counter by 3 to reuse those numbers.

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