Free in-browser tool

Turn Messy Rows Into a Dataset You Can Reuse

Name what one row represents, define the fields, and add a few real examples. The tool checks the structure and gives you clean files you can open, share, or build on.

  • Catch missing values and duplicate identifiers before they spread
  • Download CSV, JSON, XLSX, and a plain-English README
  • Keep the dataset in your browser instead of uploading it
Build your dataset

Your working file

Build the structure, then test real rows

Start small. A few awkward examples will find problems while they are still easy to fix.

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1

Name the dataset and one row

One row should represent one clear thing, such as a product, business, query, or event.

2

Define the fields

Give every column one job. Mark fields required when a useful record cannot exist without them.

3

Test a few real rows

Add records here or paste CSV. Empty rows are ignored when you check and export the dataset.

4

Fix the warnings, then take the files

The check covers field names, required values, data types, and identifiers marked unique.