Free · No signup · Runs in your browser
CSV Sequence Generator
Produce a numeric sequence column — start, end, step — as clean RFC-4180 CSV, generated client-side.
Produce a numeric sequence column — start, end, step — as clean RFC-4180 CSV, generated client-side.
Set a column name, a start and end value, and a step size. The tool walks from start to end inclusively and emits one number per row, ready to paste or download.
Type a header for the output column. It defaults to "n" and is escaped automatically if it contains commas or quotes.
Enter the first value, the last value (inclusive), and how much to increment by. Descending ranges work too — just set end below start.
The CSV is generated instantly in your browser. Copy it to the clipboard or save the file — nothing ever leaves your machine.
A focused way to produce numeric ranges for IDs, test fixtures, axis labels, and spreadsheet fills without writing a formula or a script.
Every value is computed in your browser with the standard JavaScript engine. There is no upload and no server round-trip, so your configuration stays private.
The range includes both endpoints when the step divides evenly, and the direction follows your start and end automatically.
Fractional steps are rounded to remove floating-point noise, so 0.1 increments read as 0.1, 0.2, 0.3 instead of 0.30000000000000004.
A zero step is corrected, bad numbers fall back to defaults, and row count is capped at 100,000 so a huge range can never hang the page.