RUT Generator
GeneratorsGenerate valid Chilean RUT numbers for testing
XX.XXX.XXX-Y
Click 'Generate' to create your first XX.XXX.XXX-Y
About this tool
About RUT Generator
The Chilean RUT (Rol Único Tributario) and RUN (Rol Único Nacional) are Chile's national identification numbers. Both share the same format and algorithm: a numeric body of up to 8 digits, a hyphen, and a check digit (DV) that is 0–9 or the letter K. This generator produces format-valid RUT numbers for testing using the official Modulo-11 algorithm.
Each generated number is a random 7 or 8 digit body with the correct check digit calculated via the Modulo-11 algorithm. The output is formatted in the standard Chilean style with dots as thousands separators (e.g., 12.345.678-5). Numbers are generated purely for testing — they follow the correct mathematical structure but are not issued to any real individual.
Use generated RUT numbers to populate test databases, fill in form fields during QA testing, validate that your front-end correctly handles Chilean ID inputs, or test the Modulo-11 check digit logic in your own code. It is also useful for generating realistic-looking test data for Chilean market applications.
One-click generation with immediate copy-to-clipboard. The generated RUT is always correctly formatted and mathematically valid. All computation runs locally in your browser with no data sent to any server.
Key Features
- Correct Modulo-11 check digit (DV) algorithm
- Standard dotted format: XX.XXX.XXX-Y
- Random 7–8 digit body range
- Instant copy to clipboard
- Bulk generation support
- 100% browser-based, no data sent
- For testing purposes only
FAQ
Chilean RUT Generator — Frequently Asked Questions
What is a Chilean RUT?
RUT stands for Rol Único Tributario, Chile's unique tax identifier. It is assigned to both individuals and legal entities for all tax and legal purposes. For natural persons, the RUT is identical to the RUN (Rol Único Nacional), the civil registry number assigned at birth. The format is a numeric body of up to 8 digits, a hyphen, and a check digit (DV) that can be 0–9 or the letter K.
How is the check digit (DV) calculated?
The DV uses a Modulo 11 algorithm: multiply each digit of the RUT number (right-to-left) by the repeating sequence 2, 3, 4, 5, 6, 7, sum the results, take the remainder modulo 11, then subtract from 11. If the result is 11 the DV is '0'; if 10 the DV is 'K'; otherwise the DV is that number.
Are these generated RUTs real?
No. The generator produces numbers that are mathematically valid (correct DV) but are not issued by the Chilean government. They follow the correct format and pass the Modulo 11 check, making them suitable for testing form validation and ID-handling logic, but they should never be used to impersonate a real person.
Why does the DV sometimes show as K instead of a digit?
When the Modulo 11 calculation yields a remainder of 1 (11 − 10 = 1, but the remainder of 1 mod 11 subtracted from 11 = 10, which cannot be a single digit), the letter K is used. This convention was established in the original Chilean specification to keep the DV to a single character.
Tips
- Use the RUT Validator on this site to verify any RUT number you receive
- The DV 'K' must be written as a letter, not as the number 10
- Standard Chilean formatting uses dots as thousands separators: 12.345.678-5
- Generated RUTs are for testing only — never use them to represent real individuals