Australia issues vehicle number plates state by state, and each state or territory runs its own general-issue format — the pattern stamped on standard plates when a new series is rolled out. This free validator checks an Australian plate against the current general-issue pattern for the jurisdiction you select, which is useful for fleet managers, parking systems, and developers building registration software.
How it works
There is no national plate algorithm or check digit; each authority defines a positional pattern of letters and digits. The tool normalises your input (uppercase, removing spaces and dashes) and tests it against the jurisdiction’s regular expression:
- NSW — 2 letters · 2 digits · 2 letters (e.g.
AB 12 CD) - VIC — 1 digit · 2 letters · 1 digit · 2 letters (e.g.
1AB 2CD) - QLD — 3 digits · 3 letters (e.g.
123 ABC) - WA — 1 digit · 3 letters · 3 digits (e.g.
1ABC 234) - SA —
S· 3 digits · 3 letters (e.g.S123 ABC) - TAS — 2 letters · 2 digits · 2 letters
- ACT — 3 letters · 2 digits · 1 letter (Y-series)
- NT —
C+ letter · 2 digits · 2 letters
Because some jurisdictions share a shape (NSW and TAS both use letter-letter-digit-digit-letter-letter), the tool also lists every state your plate would match, which is handy when you don’t know the issuing state.
Notes and example
Enter AB12CD with NSW selected and the validator reports a match for the 2 letters · 2 digits · 2 letters pattern. Switch to QLD and the same plate fails, because QLD general issue starts with three digits.
A format match confirms the plate is well-formed for that series — it does not confirm the vehicle is registered. Personalised and custom plates deliberately break the standard pattern and will be flagged as not matching general issue. For registration status, always use the official state road authority lookup. Everything here runs locally; your plate never leaves your device.