About this tool
Create sequences: numbers with any step, padding and decimals; dates every N days, weeks or months; letter ranges like A–Z or AA–AZ; and consecutive IP addresses.
Numbers are computed as start + i × step (no floating drift), dates by calendar steps in UTC (month ends stay valid), letters like spreadsheet columns, IPs as 32-bit counters.
Example: 1 to 10 step 3 → 1, 4, 7, 10.
Monthly steps from the 31st land on the last valid day only when that day exists — choose day 1 to 28 for exact monthly dates.
Quick steps
- Choose the options — amount, range and format.
- Press Generate. Every press gives a new result.
- Copy the result or download it as a file.
Everything runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Number, Date & Letter List Generator work?
Numbers are computed as start + i × step (no floating drift), dates by calendar steps in UTC (month ends stay valid), letters like spreadsheet columns, IPs as 32-bit counters.
What should I keep in mind?
Monthly steps from the 31st land on the last valid day only when that day exists — choose day 1 to 28 for exact monthly dates.
Is my text uploaded or saved?
No. It is processed on your device in a separate background task that is stopped if it takes too long; nothing is stored or sent.