Number Sequence Generator

Generate integer ranges with a step (forwards or backwards), geometric progressions, random integers (deduplicated and sortable, seeded from crypto rather than Math.random) and letter sequences from A to AZ. Zero padding, prefixes, suffixes, values per line and separators are all configurable.

How to use

1. Fill in the input box above, or click "Fill sample" to try it instantly
2. Adjust the options as needed — results update as you type
3. Click "Run" to get the result, then copy or export it in one click

Tips

• Runs entirely in your browser — your data never leaves the device
• Completely free, no registration, no usage limits
• Most tools compute in real time as you type