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Sequential ID Generator

Create formatted sequential identifiers with a prefix, a padded counter, a suffix, a start and a step.

Generate sequential ids

First id: —
Last id: —
Next after the list: —
Status: —
Numbers longer than the digit count are printed in full, so the counter never silently wraps.

How to use the Sequential ID Generator

  1. Type the prefix and suffix that should wrap every identifier.
  2. Set the start value, the step and how many digits the counter keeps.
  3. Choose how many ids you need, then copy the finished list.

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Frequently Asked Questions

Common questions about the free online sequential id generator.

It is an identifier built from an ordered counter, such as INV-000001, so the numbers follow one another without gaps.
The counter is filled with leading zeros until it reaches the digit count you set, so 42 becomes 000042 with six digits.
No. The counter is numeric, but the prefix and suffix accept any letters, digits or symbols you like.
No. Once the number is longer than the digit count it is printed in full, so no identifier is ever repeated.
Yes. A step of 10 gives 001000, 001010 and so on, which is handy when several systems share a number pool.
Up to 500 at a time. Copy the list and paste it into a spreadsheet or your database tool.
Invoice numbers, ticket references, order ids, licence keys and anywhere a human readable series is useful.
No. The list exists only on this page, so nothing is uploaded or kept after you close the tab.
Yes. The generator is free, unlimited and needs no account or sign-up.

Last updated: October 10, 2026