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JSON → CSV converter

Flatten an array of JSON objects into a table you can open in Excel.

Drop a JSON file here or click to select

Array of objects [{...},{...}] — keys become columns automatically

📁 Choose file

Private by design — every conversion runs inside your browser (JavaScript), so your data is never uploaded anywhere. Safe for customer lists, sales figures and personal data. It even works offline.

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All-in-one converter CSV → Excel Excel → CSV JSON → CSV CSV → JSON Markdown table maker

Frequently asked questions

Which JSON shapes are supported?

An array of objects [{...},{...}] is the primary shape. An array of arrays becomes the table as-is, and a wrapper object like {"data":[...]} is unwrapped automatically. Nested objects/arrays are stored as JSON strings in their cells.

What if objects have different keys?

Columns are built from the union of all keys; missing values are left blank.

My Korean/legacy CSV shows garbled characters

Many CSV files saved by older spreadsheet apps use legacy encodings such as EUC-KR (CP949). sheetmoa first reads your file as UTF-8 and, if it detects broken characters (�), automatically retries with the EUC-KR decoder. Legacy .xls files are read with codepage 949 as a fallback too. If it still looks wrong, re-save the file as "CSV UTF-8" in Excel.

Is my data uploaded to a server?

No. Every conversion runs inside your browser and your file is never sent over the network. Safe even for customer lists and confidential spreadsheets.

Is it free?

Completely free — no limits on file count or size, and no sign-up.