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SleekPrompt

Convert CSV to JSON

Paste a CSV or drop a spreadsheet export and get clean JSON back instantly. Auto-detects the delimiter and number types.

CSV input

empty

JSON output

Ready

How to use the CSV to JSON

  1. 1

    Paste your CSV, or drop a .csv file onto the input panel.

  2. 2

    The delimiter is detected automatically — comma, semicolon or tab.

  3. 3

    Copy the JSON output, or download it as a .json file.

Frequently asked questions

Does it detect semicolon or tab separated files?

Yes. The delimiter is auto-detected from the content, and you can override it manually if the guess is wrong for an unusual file.

Are numbers converted automatically?

With "Convert types" enabled, values that look like numbers or booleans become real JSON numbers and booleans instead of strings. Turn it off to keep every value as text.

Is my data uploaded to a server?

No. Every tool on this site runs entirely inside your browser using JavaScript. Your input never leaves your device and is never sent over the network, which means it is safe to paste production data, API responses and tokens.