Cartesian Product Generator

Every Combination, One Item From Each List

The cartesian product takes one item from every list and produces all possible tuples: 2 colors × 3 sizes = 6 combinations, add 2 materials and you get 12. Paste up to four lists (items separated by tabs, newlines, commas, semicolons, or pipes — auto-detected, so spreadsheet cells paste straight in), and the generator writes out every combination instantly. Everything runs locally in your browser; your data never leaves your device.

Worked example

List 1 red, blue × List 2 S, M, L, joined with a space:

red S
red M
red L
blue S
blue M
blue L

The count is always the product of the list sizes (here 2 × 3 = 6), and the rightmost list cycles fastest — the same order Python's itertools.product or a SQL CROSS JOIN gives you.

Features

• 2–4 lists: List 1 and List 2 are required; List 3 and List 4 are optional and simply ignored when left empty.
• Flexible splitting: items are split by tab, newline, comma, semicolon, or pipe (auto-detected, or pick one — slash is available but never guessed, so URLs and dates stay whole), trimmed, and blank entries dropped. Optionally deduplicate each list first. Tab mode also splits on line breaks, so a rectangle of spreadsheet cells pastes in as one item per cell.
• Join your way: space, nothing (concatenation), comma, dash, underscore, pipe, tab, newline, or any custom string — plus an optional prefix/suffix on every line. That covers SKUs (sku-tee-black), quoted PPC phrase-match keywords (prefix and suffix "), bracketed [...] variants, and +broad +match terms (custom join " +" with prefix +).
• Count before you generate: the Count only output format reports the multiplication (2 x 3 x 2 = 12) without producing a single line — and it ignores the cap, so you can size up a product that would be too big to generate.
• Four output formats: plain lines, CSV rows (cells quoted and escaped when needed), a JSON array of per-combination arrays, or the count alone. Copy the result or download it as a text file.
• Use cases: product variant matrices, SEO keyword permutations (best plumber Austin), test-case grids, filename or SKU generation.

Limits and edge cases

• The combination count is capped by Max combinations (default 10,000, hard cap 100,000). Exceeding it never truncates — you get an error stating the exact count so you can shrink a list or raise the cap. The Count only format is exempt: counting 26 × 26 × 26 × 26 = 456,976 is instant and safe even though generating it would exceed the cap.
• A required list with no items (empty, or only blanks/separators) is an error that names the list; empty optional lists are skipped.
• Prefix, suffix, and the join separator apply to the lines format only — CSV, JSON, and Count own their structure (quoting/escaping) instead.
• Items containing spaces (like navy blue) are fine: spaces never split items, only tabs/newlines/commas/semicolons/pipes do. Numeric-looking items like 007 or 1.50 stay exactly as typed — nothing is reformatted as a number.

FAQ