Serial number generator
Create sequential or random serial numbers with prefixes, leading zeros and downloadable batches.
Bookmark this page
Keep this page handy for next time.
- On a computer
- Press Ctrl + D, or Command + D on a Mac.
- On a phone or tablet
- Open your browser's menu or Share menu and look for Add Bookmark, Bookmark or Add to favourites.
A bookmark saves the page link. Save any tool results separately.
How to use this tool
- Choose counting upwards or random codes, and add any beginning or ending text.
- For sequential numbers, set the start, minimum digit count and increment. For random codes, choose the groups and separator.
- Generate the batch and download it. Record your next starting number separately if you need to continue a sequence later.
Things to know
- Sequential numbering uses exact whole-number arithmetic and adds leading zeros to reach the minimum width. Numbers can grow beyond that width.
- No sequence or previous batch is saved. These labels do not register products, validate manufacturer serials or guarantee uniqueness across separate batches.
- Random mode supports up to 16 groups of 32 characters.
- Generate up to 10,000 codes at a time. Results stay in this tab and are never saved by the site.
- Copy or download the complete batch as text or CSV. Import the CSV column as text to keep leading zeros; formula-like CSV values receive a protective apostrophe.
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