Tools / Online Spreadsheet Tools

Online Spreadsheet Tools

Spreadsheet tools on TheFatBaby focus on tabular interchange: Excel to CSV, Excel to JSON, and CSV to Excel. They sit alongside other developer utilities but deserve a dedicated hub for people searching for spreadsheet conversion.

Use these for one-off migrations and QA, then call the Spreadsheet API for recurring imports. Credits apply on successful conversions; invalid files fail validation early when possible.

Start freeSpreadsheet APIDocumentation

All Spreadsheet Tools

4 live tools — each links to a full SEO landing with the working UI.

CSV ↔ JSON

live

Convert CSV to JSON or JSON to CSV.

0 credits · Open →

Excel → CSV

live

Convert an .xlsx workbook sheet to CSV.

1 credits · Open →

Excel → JSON

live

Convert an .xlsx sheet to JSON rows.

1 credits · Open →

CSV → Excel

live

Convert CSV text into an .xlsx file.

1 credits · Open →

What you can do

  • Convert Excel workbooks to CSV
  • Convert Excel sheets to JSON for apps
  • Build Excel files from CSV
  • Pair with CSV ↔ JSON text utilities

Common use cases

  • Partner file onboarding
  • Moving spreadsheet exports into APIs
  • Quick format fixes before BI imports

Build with the Spreadsheet API

Every tool maps to a REST operation on TheFatBaby. Get an API key, read the docs, and keep the same credit wallet.

Spreadsheet APIGet API keyPricing

FAQ

Where do these tools live in the catalog?

They are listed under Developer tools as well as this Spreadsheet hub. Canonical URLs use nested /tools/developer/… paths.

Is there a Spreadsheet API?

Yes — see /apis/spreadsheet for REST endpoints and examples.

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