About the Random 6 Digit Number Generator
Six digits is the standard width for a verification code because it balances a million possibilities against something a person can retype from a text message. This generator produces that exact shape, from 000000 to 999999, with leading zeros intact, which is why it suits seeding a login flow, filling a staging OTP field or printing serial style labels.
These are ordinary random codes, not real one time passcodes. A genuine authenticator code is derived from a shared secret and the current clock, so it changes every thirty seconds and can be verified by the server. Nothing generated here will pass a real verification check, and it is not meant to; the point is realistic sample data while you build the screen.
With repeats off, a batch of 200 is guaranteed distinct, which is useful for a fixture file of unique reference numbers. Copy takes the whole column, and Download writes plain text one code per line. If four digits is closer to what you need, use the Random 4 Digit Number Generator, and for alphanumeric references the Random String Generator mixes letters in.
How to use
- Choose how many six digit codes your test data needs.
- Leave No repeats ticked for a set of unique reference numbers.
- Press Generate and copy the column into your fixture or spreadsheet.
- Download the batch when you want it saved as a file.
Common questions
- Can I use these as real OTP codes?
- No. Real codes are derived from a shared secret and a clock, so a random six digit number will never pass server verification.
- Are leading zeros preserved?
- Yes. Codes such as 004217 keep their zeros, so every result is exactly six characters wide.
- How many unique codes are possible?
- One million, from 000000 through 999999, all equally likely on each draw.
- What are these actually good for?
- Seeding test databases, filling staging forms, printing raffle or reference numbers and demoing a verification screen.