LC ListCombinator

Local-only workspace

Build repeatable list workflows without uploading your data

Import TXT, CSV, or JSON, arrange deterministic cleanup steps, preview the result, and save a reusable recipe. Your dataset stays in this browser tab unless you explicitly export it.

Private by default

Inputs and results are never included in recipe saves or share links.

Deterministic steps

Every operation is explicit, reorderable, and repeatable on another file.

No account required

Recipes are stored locally only when you press Save recipe.

Workflow Studio

Input → recipe → result

Step 1

Add a local dataset

0 rows

Files are read locally. CSV fields become items in reading order; JSON accepts arrays of strings, numbers, or objects.

Step 2

Build the recipe

0 steps

Local rule parser—no AI service or API key. Example: “trim spaces, remove empty lines, deduplicate ignoring case, sort ascending”.

No steps yet

Add an operation or describe a workflow above. Steps run from top to bottom.

    Step 3

    Run and preview

    0 rows
    0Input
    0Output
    0Removed
    0 msDuration

    Ready. Add input and at least one enabled step.

    Preview is capped for responsiveness; exports use the complete result.

    This browser only

    Saved recipes

    Only recipe names, steps, and options are stored. Input and output are excluded.

    No recipes saved on this device.

      What a recipe contains

      Operation IDs

      Known local operations such as trim, deduplicate, filter, sort, replace, or change case.

      Safe options

      Small settings such as sort direction or a prefix. Unknown operations and malformed options are rejected.

      No dataset

      Recipe JSON and recipe links deliberately omit pasted text, imported files, output, and filenames.

      Privacy settings

      Control optional providers

      Necessary local storage keeps your consent choice and, when you ask, recipes or favorites on this device.