free csv & excel tools

Quick tools for messy spreadsheet work.

Convert, validate, and inspect CSV and Excel files in your browser. These tools are free, private, and built around the import problems SaaS teams hit before data reaches the backend.

available now

Free tools

Each tool is useful on its own and points to the deeper Rowslint workflow when you need this inside a product.

Converter

Convert CSV to JSON in your browser

Paste CSV, pick delimiter and output shape, then copy or download JSON without uploading the file.

CSVJSONprivate
Open toolConverter

Turn modern Excel workbooks into CSV

Upload a .xlsx workbook, choose a sheet, select a delimiter, and export CSV locally in the browser.

XLSXCSVworksheets
Open toolValidator

Find CSV issues before import

Check required values, invalid emails, duplicates, and row shape problems before a file reaches your backend.

required fieldsemailsduplicates
Open tool
next tools

Built as a system, not one-off pages.

The layout is ready for more focused tools. The next additions should capture search traffic while staying close to Rowslint's paid product: import quality, validation, mapping, and file preparation.

  • JSON to CSV converter
  • CSV delimiter converter
  • TSV to CSV converter
  • CSV schema generator
inside your app

Free tools are useful. A guided import flow converts customers.

Rowslint embeds CSV and Excel import, column mapping, validation, and clean row delivery directly into your SaaS onboarding.

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