Read the province, birth date and gender out of an Indonesian NIK/KTP number - purely by computation, locally in your browser, no registry lookup.
Running locally on your device ...
Running locally on your device ...
0%
Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
The NIK (Nomor Induk Kependudukan) is Indonesia's sixteen-digit personal identity number, printed on the KTP ID card. Its structure is publicly documented: two digits province code, two digits regency code, two digits sub-district code, then the birth date (day, month, two-digit year) and a four-digit sequence number. For a female holder, 40 is added to the day - that is how the number itself encodes gender.
This tool is a decoder, not a registry lookup (important and honest): it reads out only what is publicly documented in the sixteen digits themselves - province, regency/sub-district code (as raw digits, without name lookup, since those tables are not reliably sourceable), birth date and gender. It does not access any population registry and stores nothing. There is also no publicly documented check digit for a NIK - this tool therefore validates length and date plausibility, never an invented checksum.
All processing runs locally in your browser as plain JavaScript - your NIK is never uploaded, sent anywhere or stored.
| Input formats | Text input |
|---|---|
| Output format | JSON |
| Batch processing | No |
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: IMPORTANT: this tool performs only a mathematical checksum/format check. It is not an official identity, existence, or registry verification and not a request to any authority. Any additional information derived from the number's structure (province, birth date, gender) is based solely on the publicly documented encoding logic of the issuing authority. This tool derives the birth date, gender and region purely by computation from the number you enter; it does not access any registry and stores nothing. Regency/sub-district names and the newest (2022) province codes are deliberately not guessed, only shown as a raw code. This function runs exclusively locally in the user's browser. The provider never receives, stores, or transmits the entered number or any result derived from it. The provider is therefore not a data controller or processor within the meaning of UU PDP 27/2022 Pasal 1 Angka 4/5 with respect to this input.
No. Decoding runs entirely locally in your browser; the NIK never leaves your device and is not stored.
No, never. It reads out only what the sixteen digits themselves publicly, documentedly encode - no registry lookup, no existence check.
For a female holder, 40 is added to the birth day (e.g. day 15 becomes 55); this tool subtracts that back out and shows the real date plus the encoded gender.
No - no publicly documented check digit is known for the NIK. The tool validates length and date plausibility, but does not invent a checksum.